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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

Browse Source 
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (32 commits)
  [CIFS] Fix double list addition in cifs posix open code
  [CIFS] Allow raw ntlmssp code to be enabled with sec=ntlmssp
  [CIFS] Fix SMB uid in NTLMSSP authenticate request
  [CIFS] NTLMSSP reenabled after move from connect.c to sess.c
  [CIFS] Remove sparse warning
  [CIFS] remove checkpatch warning
  [CIFS] Fix final user of old string conversion code
  [CIFS] remove cifs_strfromUCS_le
  [CIFS] NTLMSSP support moving into new file, old dead code removed
  [CIFS] Fix endian conversion of vcnum field
  [CIFS] Remove trailing whitespace
  [CIFS] Remove sparse endian warnings
  [CIFS] Add remaining ntlmssp flags and standardize field names
  [CIFS] Fix build warning
  cifs: fix length handling in cifs_get_name_from_search_buf
  [CIFS] Remove unneeded QuerySymlink call and fix mapping for unmapped status
  [CIFS] rename cifs_strndup to cifs_strndup_from_ucs
  Added loop check when mounting DFS tree.
  Enable dfs submounts to handle remote referrals.
  [CIFS] Remove older session setup implementation
  ...
This commit is contained in:
Linus Torvalds 2009-05-07 21:13:24 -07:00
commit d7a5926978
22 changed files with 811 additions and 1643 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
fs/cifs/CHANGES
View File

@ -1,3 +1,16 @@
Version 1.58
------------
Guard against buffer overruns in various UCS-2 to UTF-8 string conversions
when the UTF-8 string is composed of unusually long (more than 4 byte) converted
characters. Add support for mounting root of a share which redirects immediately
to DFS target. Convert string conversion functions from Unicode to more
accurately mark string length before allocating memory (which may help the
rare cases where a UTF-8 string is much larger than the UCS2 string that
we converted from). Fix endianness of the vcnum field used during
session setup to distinguish multiple mounts to same server from different
userids. Raw NTLMSSP fixed (it requires /proc/fs/cifs/experimental
flag to be set to 2, and mount must enable krb5 to turn on extended security).
Version 1.57
------------
Improve support for multiple security contexts to the same server. We

10
fs/cifs/README
View File

@ -651,7 +651,15 @@ Experimental When set to 1 used to enable certain experimental
signing turned on in case buffer was modified
just before it was sent, also this flag will
be used to use the new experimental directory change
notification code).
notification code). When set to 2 enables
an additional experimental feature, "raw ntlmssp"
session establishment support (which allows
specifying "sec=ntlmssp" on mount). The Linux cifs
module will use ntlmv2 authentication encapsulated
in "raw ntlmssp" (not using SPNEGO) when
"sec=ntlmssp" is specified on mount.
This support also requires building cifs with
the CONFIG_CIFS_EXPERIMENTAL configuration flag.
These experimental features and tracing can be enabled by changing flags in
/proc/fs/cifs (after the cifs module has been installed or built into the

32
fs/cifs/cifs_dfs_ref.c
View File

@ -340,28 +340,24 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
for (i = 0; i < num_referrals; i++) {
int len;
dump_referral(referrals+i);
/* connect to a storage node */
if (referrals[i].flags & DFSREF_STORAGE_SERVER) {
int len;
len = strlen(referrals[i].node_name);
if (len < 2) {
cERROR(1, ("%s: Net Address path too short: %s",
/* connect to a node */
len = strlen(referrals[i].node_name);
if (len < 2) {
cERROR(1, ("%s: Net Address path too short: %s",
__func__, referrals[i].node_name));
rc = -EINVAL;
goto out_err;
}
mnt = cifs_dfs_do_refmount(nd->path.mnt,
nd->path.dentry,
referrals + i);
cFYI(1, ("%s: cifs_dfs_do_refmount:%s , mnt:%p",
__func__,
rc = -EINVAL;
goto out_err;
}
mnt = cifs_dfs_do_refmount(nd->path.mnt,
nd->path.dentry, referrals + i);
cFYI(1, ("%s: cifs_dfs_do_refmount:%s , mnt:%p", __func__,
referrals[i].node_name, mnt));
/* complete mount procedure if we accured submount */
if (!IS_ERR(mnt))
break;
}
/* complete mount procedure if we accured submount */
if (!IS_ERR(mnt))
break;
}
/* we need it cause for() above could exit without valid submount */

200
fs/cifs/cifs_unicode.c
View File

@ -1,7 +1,7 @@
/*
* fs/cifs/cifs_unicode.c
*
* Copyright (c) International Business Machines Corp., 2000,2005
* Copyright (c) International Business Machines Corp., 2000,2009
* Modified by Steve French (sfrench@us.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
@ -26,31 +26,157 @@
#include "cifs_debug.h"
/*
* NAME: cifs_strfromUCS()
*
* FUNCTION: Convert little-endian unicode string to character string
* cifs_ucs2_bytes - how long will a string be after conversion?
* @ucs - pointer to input string
* @maxbytes - don't go past this many bytes of input string
* @codepage - destination codepage
*
* Walk a ucs2le string and return the number of bytes that the string will
* be after being converted to the given charset, not including any null
* termination required. Don't walk past maxbytes in the source buffer.
*/
int
cifs_strfromUCS_le(char *to, const __le16 *from,
int len, const struct nls_table *codepage)
cifs_ucs2_bytes(const __le16 *from, int maxbytes,
const struct nls_table *codepage)
{
int i;
int outlen = 0;
int charlen, outlen = 0;
int maxwords = maxbytes / 2;
char tmp[NLS_MAX_CHARSET_SIZE];
for (i = 0; (i < len) && from[i]; i++) {
int charlen;
/* 2.4.0 kernel or greater */
charlen =
codepage->uni2char(le16_to_cpu(from[i]), &to[outlen],
NLS_MAX_CHARSET_SIZE);
if (charlen > 0) {
for (i = 0; from[i] && i < maxwords; i++) {
charlen = codepage->uni2char(le16_to_cpu(from[i]), tmp,
NLS_MAX_CHARSET_SIZE);
if (charlen > 0)
outlen += charlen;
} else {
to[outlen++] = '?';
}
else
outlen++;
}
to[outlen] = 0;
return outlen;
}
/*
* cifs_mapchar - convert a little-endian char to proper char in codepage
* @target - where converted character should be copied
* @src_char - 2 byte little-endian source character
* @cp - codepage to which character should be converted
* @mapchar - should character be mapped according to mapchars mount option?
*
* This function handles the conversion of a single character. It is the
* responsibility of the caller to ensure that the target buffer is large
* enough to hold the result of the conversion (at least NLS_MAX_CHARSET_SIZE).
*/
static int
cifs_mapchar(char *target, const __le16 src_char, const struct nls_table *cp,
bool mapchar)
{
int len = 1;
if (!mapchar)
goto cp_convert;
/*
* BB: Cannot handle remapping UNI_SLASH until all the calls to
* build_path_from_dentry are modified, as they use slash as
* separator.
*/
switch (le16_to_cpu(src_char)) {
case UNI_COLON:
*target = ':';
break;
case UNI_ASTERIK:
*target = '*';
break;
case UNI_QUESTION:
*target = '?';
break;
case UNI_PIPE:
*target = '|';
break;
case UNI_GRTRTHAN:
*target = '>';
break;
case UNI_LESSTHAN:
*target = '<';
break;
default:
goto cp_convert;
}
out:
return len;
cp_convert:
len = cp->uni2char(le16_to_cpu(src_char), target,
NLS_MAX_CHARSET_SIZE);
if (len <= 0) {
*target = '?';
len = 1;
}
goto out;
}
/*
* cifs_from_ucs2 - convert utf16le string to local charset
* @to - destination buffer
* @from - source buffer
* @tolen - destination buffer size (in bytes)
* @fromlen - source buffer size (in bytes)
* @codepage - codepage to which characters should be converted
* @mapchar - should characters be remapped according to the mapchars option?
*
* Convert a little-endian ucs2le string (as sent by the server) to a string
* in the provided codepage. The tolen and fromlen parameters are to ensure
* that the code doesn't walk off of the end of the buffer (which is always
* a danger if the alignment of the source buffer is off). The destination
* string is always properly null terminated and fits in the destination
* buffer. Returns the length of the destination string in bytes (including
* null terminator).
*
* Note that some windows versions actually send multiword UTF-16 characters
* instead of straight UCS-2. The linux nls routines however aren't able to
* deal with those characters properly. In the event that we get some of
* those characters, they won't be translated properly.
*/
int
cifs_from_ucs2(char *to, const __le16 *from, int tolen, int fromlen,
const struct nls_table *codepage, bool mapchar)
{
int i, charlen, safelen;
int outlen = 0;
int nullsize = nls_nullsize(codepage);
int fromwords = fromlen / 2;
char tmp[NLS_MAX_CHARSET_SIZE];
/*
* because the chars can be of varying widths, we need to take care
* not to overflow the destination buffer when we get close to the
* end of it. Until we get to this offset, we don't need to check
* for overflow however.
*/
safelen = tolen - (NLS_MAX_CHARSET_SIZE + nullsize);
for (i = 0; i < fromwords && from[i]; i++) {
/*
* check to see if converting this character might make the
* conversion bleed into the null terminator
*/
if (outlen >= safelen) {
charlen = cifs_mapchar(tmp, from[i], codepage, mapchar);
if ((outlen + charlen) > (tolen - nullsize))
break;
}
/* put converted char into 'to' buffer */
charlen = cifs_mapchar(&to[outlen], from[i], codepage, mapchar);
outlen += charlen;
}
/* properly null-terminate string */
for (i = 0; i < nullsize; i++)
to[outlen++] = 0;
return outlen;
}
@ -88,3 +214,41 @@ cifs_strtoUCS(__le16 *to, const char *from, int len,
return i;
}
/*
* cifs_strndup_from_ucs - copy a string from wire format to the local codepage
* @src - source string
* @maxlen - don't walk past this many bytes in the source string
* @is_unicode - is this a unicode string?
* @codepage - destination codepage
*
* Take a string given by the server, convert it to the local codepage and
* put it in a new buffer. Returns a pointer to the new string or NULL on
* error.
*/
char *
cifs_strndup_from_ucs(const char *src, const int maxlen, const bool is_unicode,
const struct nls_table *codepage)
{
int len;
char *dst;
if (is_unicode) {
len = cifs_ucs2_bytes((__le16 *) src, maxlen, codepage);
len += nls_nullsize(codepage);
dst = kmalloc(len, GFP_KERNEL);
if (!dst)
return NULL;
cifs_from_ucs2(dst, (__le16 *) src, len, maxlen, codepage,
false);
} else {
len = strnlen(src, maxlen);
len++;
dst = kmalloc(len, GFP_KERNEL);
if (!dst)
return NULL;
strlcpy(dst, src, len);
}
return dst;
}

23
fs/cifs/cifs_unicode.h
View File

@ -5,7 +5,7 @@
* Convert a unicode character to upper or lower case using
* compressed tables.
*
* Copyright (c) International Business Machines Corp., 2000,2007
* Copyright (c) International Business Machines Corp., 2000,2009
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -37,6 +37,19 @@
#define UNIUPR_NOLOWER /* Example to not expand lower case tables */
/*
* Windows maps these to the user defined 16 bit Unicode range since they are
* reserved symbols (along with \ and /), otherwise illegal to store
* in filenames in NTFS
*/
#define UNI_ASTERIK (__u16) ('*' + 0xF000)
#define UNI_QUESTION (__u16) ('?' + 0xF000)
#define UNI_COLON (__u16) (':' + 0xF000)
#define UNI_GRTRTHAN (__u16) ('>' + 0xF000)
#define UNI_LESSTHAN (__u16) ('<' + 0xF000)
#define UNI_PIPE (__u16) ('|' + 0xF000)
#define UNI_SLASH (__u16) ('\\' + 0xF000)
/* Just define what we want from uniupr.h. We don't want to define the tables
* in each source file.
*/
@ -59,8 +72,14 @@ extern struct UniCaseRange UniLowerRange[];
#endif /* UNIUPR_NOLOWER */
#ifdef __KERNEL__
int cifs_strfromUCS_le(char *, const __le16 *, int, const struct nls_table *);
int cifs_from_ucs2(char *to, const __le16 *from, int tolen, int fromlen,
const struct nls_table *codepage, bool mapchar);
int cifs_ucs2_bytes(const __le16 *from, int maxbytes,
const struct nls_table *codepage);
int cifs_strtoUCS(__le16 *, const char *, int, const struct nls_table *);
char *cifs_strndup_from_ucs(const char *src, const int maxlen,
const bool is_unicode,
const struct nls_table *codepage);
#endif
/*

2
fs/cifs/cifsfs.h
View File

@ -100,5 +100,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* EXPERIMENTAL */
#define CIFS_VERSION "1.57"
#define CIFS_VERSION "1.58"
#endif /* _CIFSFS_H */

16
fs/cifs/cifsglob.h
View File

@ -82,8 +82,8 @@ enum securityEnum {
LANMAN, /* Legacy LANMAN auth */
NTLM, /* Legacy NTLM012 auth with NTLM hash */
NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
RawNTLMSSP, /* NTLMSSP without SPNEGO */
NTLMSSP, /* NTLMSSP via SPNEGO */
RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
NTLMSSP, /* NTLMSSP via SPNEGO, NTLMv2 hash */
Kerberos, /* Kerberos via SPNEGO */
MSKerberos, /* MS Kerberos via SPNEGO */
};
@ -531,6 +531,7 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param,
#define CIFSSEC_MAY_PLNTXT 0
#endif /* weak passwords */
#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
#define CIFSSEC_MUST_SIGN 0x01001
/* note that only one of the following can be set so the
@ -543,22 +544,23 @@ require use of the stronger protocol */
#define CIFSSEC_MUST_LANMAN 0x10010
#define CIFSSEC_MUST_PLNTXT 0x20020
#ifdef CONFIG_CIFS_UPCALL
#define CIFSSEC_MASK 0x3F03F /* allows weak security but also krb5 */
#define CIFSSEC_MASK 0xAF0AF /* allows weak security but also krb5 */
#else
#define CIFSSEC_MASK 0x37037 /* current flags supported if weak */
#define CIFSSEC_MASK 0xA70A7 /* current flags supported if weak */
#endif /* UPCALL */
#else /* do not allow weak pw hash */
#ifdef CONFIG_CIFS_UPCALL
#define CIFSSEC_MASK 0x0F00F /* flags supported if no weak allowed */
#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
#else
#define CIFSSEC_MASK 0x07007 /* flags supported if no weak allowed */
#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
#endif /* UPCALL */
#endif /* WEAK_PW_HASH */
#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5)
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
/*
*****************************************************************
* All constants go here

5
fs/cifs/cifsproto.h
View File

@ -260,8 +260,7 @@ extern int CIFSUnixCreateSymLink(const int xid,
const struct nls_table *nls_codepage);
extern int CIFSSMBUnixQuerySymLink(const int xid,
struct cifsTconInfo *tcon,
const unsigned char *searchName,
char *syminfo, const int buflen,
const unsigned char *searchName, char **syminfo,
const struct nls_table *nls_codepage);
extern int CIFSSMBQueryReparseLinkInfo(const int xid,
struct cifsTconInfo *tcon,
@ -307,8 +306,6 @@ extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, __u64 *inode_number,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int cifs_convertUCSpath(char *target, const __le16 *source, int maxlen,
const struct nls_table *codepage);
extern int cifsConvertToUCS(__le16 *target, const char *source, int maxlen,
const struct nls_table *cp, int mapChars);

217
fs/cifs/cifssmb.c
View File

@ -1,7 +1,7 @@
/*
* fs/cifs/cifssmb.c
*
* Copyright (C) International Business Machines Corp., 2002,2008
* Copyright (C) International Business Machines Corp., 2002,2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
* Contains the routines for constructing the SMB PDUs themselves
@ -81,41 +81,6 @@ static struct {
#endif /* CONFIG_CIFS_WEAK_PW_HASH */
#endif /* CIFS_POSIX */
/* Allocates buffer into dst and copies smb string from src to it.
* caller is responsible for freeing dst if function returned 0.
* returns:
* on success - 0
* on failure - errno
*/
static int
cifs_strncpy_to_host(char **dst, const char *src, const int maxlen,
const bool is_unicode, const struct nls_table *nls_codepage)
{
int plen;
if (is_unicode) {
plen = UniStrnlen((wchar_t *)src, maxlen);
*dst = kmalloc(plen + 2, GFP_KERNEL);
if (!*dst)
goto cifs_strncpy_to_host_ErrExit;
cifs_strfromUCS_le(*dst, (__le16 *)src, plen, nls_codepage);
} else {
plen = strnlen(src, maxlen);
*dst = kmalloc(plen + 2, GFP_KERNEL);
if (!*dst)
goto cifs_strncpy_to_host_ErrExit;
strncpy(*dst, src, plen);
}
(*dst)[plen] = 0;
(*dst)[plen+1] = 0; /* harmless for ASCII case, needed for Unicode */
return 0;
cifs_strncpy_to_host_ErrExit:
cERROR(1, ("Failed to allocate buffer for string\n"));
return -ENOMEM;
}
/* Mark as invalid, all open files on tree connections since they
were closed when session to server was lost */
static void mark_open_files_invalid(struct cifsTconInfo *pTcon)
@ -484,6 +449,14 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
cFYI(1, ("Kerberos only mechanism, enable extended security"));
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
cFYI(1, ("NTLMSSP only mechanism, enable extended security"));
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
}
#endif
count = 0;
for (i = 0; i < CIFS_NUM_PROT; i++) {
@ -620,6 +593,8 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
server->secType = NTLMv2;
else if (secFlags & CIFSSEC_MAY_KRB5)
server->secType = Kerberos;
else if (secFlags & CIFSSEC_MAY_NTLMSSP)
server->secType = NTLMSSP;
else if (secFlags & CIFSSEC_MAY_LANMAN)
server->secType = LANMAN;
/* #ifdef CONFIG_CIFS_EXPERIMENTAL
@ -2417,8 +2392,7 @@ winCreateHardLinkRetry:
int
CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName,
char *symlinkinfo, const int buflen,
const unsigned char *searchName, char **symlinkinfo,
const struct nls_table *nls_codepage)
{
/* SMB_QUERY_FILE_UNIX_LINK */
@ -2428,6 +2402,7 @@ CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
int bytes_returned;
int name_len;
__u16 params, byte_count;
char *data_start;
cFYI(1, ("In QPathSymLinkInfo (Unix) for path %s", searchName));
@ -2482,30 +2457,26 @@ querySymLinkRetry:
/* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
if (rc || (pSMBr->ByteCount < 2))
/* BB also check enough total bytes returned */
rc = -EIO; /* bad smb */
if (rc || (pSMBr->ByteCount < 2))
rc = -EIO;
else {
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
__u16 count = le16_to_cpu(pSMBr->t2.DataCount);
bool is_unicode;
u16 count = le16_to_cpu(pSMBr->t2.DataCount);
data_start = ((char *) &pSMBr->hdr.Protocol) +
le16_to_cpu(pSMBr->t2.DataOffset);
if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
is_unicode = true;
else
is_unicode = false;
if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len = UniStrnlen((wchar_t *) ((char *)
&pSMBr->hdr.Protocol + data_offset),
min_t(const int, buflen, count) / 2);
/* BB FIXME investigate remapping reserved chars here */
cifs_strfromUCS_le(symlinkinfo,
(__le16 *) ((char *)&pSMBr->hdr.Protocol
+ data_offset),
name_len, nls_codepage);
} else {
strncpy(symlinkinfo,
(char *) &pSMBr->hdr.Protocol +
data_offset,
min_t(const int, buflen, count));
}
symlinkinfo[buflen] = 0;
/* just in case so calling code does not go off the end of buffer */
*symlinkinfo = cifs_strndup_from_ucs(data_start, count,
is_unicode, nls_codepage);
if (!symlinkinfo)
rc = -ENOMEM;
}
}
cifs_buf_release(pSMB);
@ -2603,7 +2574,6 @@ validate_ntransact(char *buf, char **ppparm, char **ppdata,
*pparmlen = parm_count;
return 0;
}
#endif /* CIFS_EXPERIMENTAL */
int
CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
@ -2613,7 +2583,6 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
{
int rc = 0;
int bytes_returned;
int name_len;
struct smb_com_transaction_ioctl_req *pSMB;
struct smb_com_transaction_ioctl_rsp *pSMBr;
@ -2650,59 +2619,55 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
} else { /* decode response */
__u32 data_offset = le32_to_cpu(pSMBr->DataOffset);
__u32 data_count = le32_to_cpu(pSMBr->DataCount);
if ((pSMBr->ByteCount < 2) || (data_offset > 512))
if ((pSMBr->ByteCount < 2) || (data_offset > 512)) {
/* BB also check enough total bytes returned */
rc = -EIO; /* bad smb */
else {
if (data_count && (data_count < 2048)) {
char *end_of_smb = 2 /* sizeof byte count */ +
pSMBr->ByteCount +
(char *)&pSMBr->ByteCount;
goto qreparse_out;
}
if (data_count && (data_count < 2048)) {
char *end_of_smb = 2 /* sizeof byte count */ +
pSMBr->ByteCount + (char *)&pSMBr->ByteCount;
struct reparse_data *reparse_buf =
struct reparse_data *reparse_buf =
(struct reparse_data *)
((char *)&pSMBr->hdr.Protocol
+ data_offset);
if ((char *)reparse_buf >= end_of_smb) {
rc = -EIO;
goto qreparse_out;
}
if ((reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset +
reparse_buf->TargetNameLen) >
end_of_smb) {
cFYI(1, ("reparse buf beyond SMB"));
rc = -EIO;
goto qreparse_out;
}
if ((char *)reparse_buf >= end_of_smb) {
rc = -EIO;
goto qreparse_out;
}
if ((reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset +
reparse_buf->TargetNameLen) > end_of_smb) {
cFYI(1, ("reparse buf beyond SMB"));
rc = -EIO;
goto qreparse_out;
}
if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len = UniStrnlen((wchar_t *)
if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
cifs_from_ucs2(symlinkinfo, (__le16 *)
(reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset),
min(buflen/2,
reparse_buf->TargetNameLen / 2));
cifs_strfromUCS_le(symlinkinfo,
(__le16 *) (reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset),
name_len, nls_codepage);
} else { /* ASCII names */
strncpy(symlinkinfo,
reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset,
min_t(const int, buflen,
reparse_buf->TargetNameLen));
}
} else {
rc = -EIO;
cFYI(1, ("Invalid return data count on "
"get reparse info ioctl"));
buflen,
reparse_buf->TargetNameLen,
nls_codepage, 0);
} else { /* ASCII names */
strncpy(symlinkinfo,
reparse_buf->LinkNamesBuf +
reparse_buf->TargetNameOffset,
min_t(const int, buflen,
reparse_buf->TargetNameLen));
}
symlinkinfo[buflen] = 0; /* just in case so the caller
does not go off the end of the buffer */
cFYI(1, ("readlink result - %s", symlinkinfo));
} else {
rc = -EIO;
cFYI(1, ("Invalid return data count on "
"get reparse info ioctl"));
}
symlinkinfo[buflen] = 0; /* just in case so the caller
does not go off the end of the buffer */
cFYI(1, ("readlink result - %s", symlinkinfo));
}
qreparse_out:
cifs_buf_release(pSMB);
@ -2711,6 +2676,7 @@ qreparse_out:
return rc;
}
#endif /* CIFS_EXPERIMENTAL */
#ifdef CONFIG_CIFS_POSIX
@ -3928,27 +3894,6 @@ GetInodeNumOut:
return rc;
}
/* computes length of UCS string converted to host codepage
* @src: UCS string
* @maxlen: length of the input string in UCS characters
* (not in bytes)
*
* return: size of input string in host codepage
*/
static int hostlen_fromUCS(const __le16 *src, const int maxlen,
const struct nls_table *nls_codepage) {
int i;
int hostlen = 0;
char to[4];
int charlen;
for (i = 0; (i < maxlen) && src[i]; ++i) {
charlen = nls_codepage->uni2char(le16_to_cpu(src[i]),
to, NLS_MAX_CHARSET_SIZE);
hostlen += charlen > 0 ? charlen : 1;
}
return hostlen;
}
/* parses DFS refferal V3 structure
* caller is responsible for freeing target_nodes
* returns:
@ -3994,7 +3939,7 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n",
*num_of_nodes,
le16_to_cpu(pSMBr->DFSFlags)));
le32_to_cpu(pSMBr->DFSFlags)));
*target_nodes = kzalloc(sizeof(struct dfs_info3_param) *
*num_of_nodes, GFP_KERNEL);
@ -4010,14 +3955,14 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
int max_len;
struct dfs_info3_param *node = (*target_nodes)+i;
node->flags = le16_to_cpu(pSMBr->DFSFlags);
node->flags = le32_to_cpu(pSMBr->DFSFlags);
if (is_unicode) {
__le16 *tmp = kmalloc(strlen(searchName)*2 + 2,
GFP_KERNEL);
cifsConvertToUCS((__le16 *) tmp, searchName,
PATH_MAX, nls_codepage, remap);
node->path_consumed = hostlen_fromUCS(tmp,
le16_to_cpu(pSMBr->PathConsumed)/2,
node->path_consumed = cifs_ucs2_bytes(tmp,
le16_to_cpu(pSMBr->PathConsumed),
nls_codepage);
kfree(tmp);
} else
@ -4029,20 +3974,24 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
/* copy DfsPath */
temp = (char *)ref + le16_to_cpu(ref->DfsPathOffset);
max_len = data_end - temp;
rc = cifs_strncpy_to_host(&(node->path_name), temp,
max_len, is_unicode, nls_codepage);
if (rc)
node->path_name = cifs_strndup_from_ucs(temp, max_len,
is_unicode, nls_codepage);
if (IS_ERR(node->path_name)) {
rc = PTR_ERR(node->path_name);
node->path_name = NULL;
goto parse_DFS_referrals_exit;
}
/* copy link target UNC */
temp = (char *)ref + le16_to_cpu(ref->NetworkAddressOffset);
max_len = data_end - temp;
rc = cifs_strncpy_to_host(&(node->node_name), temp,
max_len, is_unicode, nls_codepage);
if (rc)
node->node_name = cifs_strndup_from_ucs(temp, max_len,
is_unicode, nls_codepage);
if (IS_ERR(node->node_name)) {
rc = PTR_ERR(node->node_name);
node->node_name = NULL;
goto parse_DFS_referrals_exit;
ref += le16_to_cpu(ref->Size);
}
}
parse_DFS_referrals_exit:

1190
fs/cifs/connect.c
View File

File diff suppressed because it is too large Load Diff

15
fs/cifs/dir.c
View File

@ -281,6 +281,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
int create_options = CREATE_NOT_DIR;
int oplock = 0;
int oflags;
bool posix_create = false;
/*
* BB below access is probably too much for mknod to request
* but we have to do query and setpathinfo so requesting
@ -328,11 +329,13 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
negotation. EREMOTE indicates DFS junction, which is not
handled in posix open */
if ((rc == 0) && (newinode == NULL))
goto cifs_create_get_file_info; /* query inode info */
else if (rc == 0) /* success, no need to query */
goto cifs_create_set_dentry;
else if ((rc != -EIO) && (rc != -EREMOTE) &&
if (rc == 0) {
posix_create = true;
if (newinode == NULL) /* query inode info */
goto cifs_create_get_file_info;
else /* success, no need to query */
goto cifs_create_set_dentry;
} else if ((rc != -EIO) && (rc != -EREMOTE) &&
(rc != -EOPNOTSUPP)) /* path not found or net err */
goto cifs_create_out;
/* else fallthrough to retry, using older open call, this is
@ -464,7 +467,7 @@ cifs_create_set_dentry:
if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) {
/* mknod case - do not leave file open */
CIFSSMBClose(xid, tcon, fileHandle);
} else if (newinode) {
} else if (!(posix_create) && (newinode)) {
cifs_fill_fileinfo(newinode, fileHandle,
cifs_sb->tcon, write_only);
}

14
fs/cifs/file.c
View File

@ -129,15 +129,12 @@ static inline int cifs_posix_open_inode_helper(struct inode *inode,
struct file *file, struct cifsInodeInfo *pCifsInode,
struct cifsFileInfo *pCifsFile, int oplock, u16 netfid)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
/* struct timespec temp; */ /* BB REMOVEME BB */
file->private_data = kmalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
if (file->private_data == NULL)
return -ENOMEM;
pCifsFile = cifs_init_private(file->private_data, inode, file, netfid);
write_lock(&GlobalSMBSeslock);
list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList);
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
if (pCifsInode == NULL) {
@ -145,17 +142,6 @@ static inline int cifs_posix_open_inode_helper(struct inode *inode,
return -EINVAL;
}
/* want handles we can use to read with first
in the list so we do not have to walk the
list to search for one in write_begin */
if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
list_add_tail(&pCifsFile->flist,
&pCifsInode->openFileList);
} else {
list_add(&pCifsFile->flist,
&pCifsInode->openFileList);
}
if (pCifsInode->clientCanCacheRead) {
/* we have the inode open somewhere else
no need to discard cache data */

21
fs/cifs/inode.c
View File

@ -962,13 +962,21 @@ undo_setattr:
goto out_close;
}
/*
* If dentry->d_inode is null (usually meaning the cached dentry
* is a negative dentry) then we would attempt a standard SMB delete, but
* if that fails we can not attempt the fall back mechanisms on EACESS
* but will return the EACESS to the caller. Note that the VFS does not call
* unlink on negative dentries currently.
*/
int cifs_unlink(struct inode *dir, struct dentry *dentry)
{
int rc = 0;
int xid;
char *full_path = NULL;
struct inode *inode = dentry->d_inode;
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
struct cifsInodeInfo *cifs_inode;
struct super_block *sb = dir->i_sb;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifsTconInfo *tcon = cifs_sb->tcon;
@ -1012,7 +1020,7 @@ psx_del_no_retry:
rc = cifs_rename_pending_delete(full_path, dentry, xid);
if (rc == 0)
drop_nlink(inode);
} else if (rc == -EACCES && dosattr == 0) {
} else if ((rc == -EACCES) && (dosattr == 0) && inode) {
attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
if (attrs == NULL) {
rc = -ENOMEM;
@ -1020,7 +1028,8 @@ psx_del_no_retry:
}
/* try to reset dos attributes */
origattr = cifsInode->cifsAttrs;
cifs_inode = CIFS_I(inode);
origattr = cifs_inode->cifsAttrs;
if (origattr == 0)
origattr |= ATTR_NORMAL;
dosattr = origattr & ~ATTR_READONLY;
@ -1041,13 +1050,13 @@ psx_del_no_retry:
out_reval:
if (inode) {
cifsInode = CIFS_I(inode);
cifsInode->time = 0; /* will force revalidate to get info
cifs_inode = CIFS_I(inode);
cifs_inode->time = 0; /* will force revalidate to get info
when needed */
inode->i_ctime = current_fs_time(sb);
}
dir->i_ctime = dir->i_mtime = current_fs_time(sb);
cifsInode = CIFS_I(dir);
cifs_inode = CIFS_I(dir);
CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
kfree(full_path);

114
fs/cifs/link.c
View File

@ -119,16 +119,11 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
full_path = build_path_from_dentry(direntry);
if (!full_path)
goto out_no_free;
goto out;
cFYI(1, ("Full path: %s inode = 0x%p", full_path, inode));
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
target_path = kmalloc(PATH_MAX, GFP_KERNEL);
if (!target_path) {
target_path = ERR_PTR(-ENOMEM);
goto out;
}
/* We could change this to:
if (pTcon->unix_ext)
@ -138,8 +133,7 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
if (pTcon->ses->capabilities & CAP_UNIX)
rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
target_path,
PATH_MAX-1,
&target_path,
cifs_sb->local_nls);
else {
/* BB add read reparse point symlink code here */
@ -148,22 +142,16 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
/* BB Add MAC style xsymlink check here if enabled */
}
if (rc == 0) {
/* BB Add special case check for Samba DFS symlinks */
target_path[PATH_MAX-1] = 0;
} else {
if (rc != 0) {
kfree(target_path);
target_path = ERR_PTR(rc);
}
out:
kfree(full_path);
out_no_free:
out:
FreeXid(xid);
nd_set_link(nd, target_path);
return NULL; /* No cookie */
return NULL;
}
int
@ -224,98 +212,6 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
return rc;
}
int
cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
{
struct inode *inode = direntry->d_inode;
int rc = -EACCES;
int xid;
int oplock = 0;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
char *full_path = NULL;
char *tmpbuffer;
int len;
__u16 fid;
xid = GetXid();
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
/* BB would it be safe against deadlock to grab this sem
even though rename itself grabs the sem and calls lookup? */
/* mutex_lock(&inode->i_sb->s_vfs_rename_mutex);*/
full_path = build_path_from_dentry(direntry);
/* mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);*/
if (full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
}
cFYI(1,
("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
full_path, inode, pBuffer, buflen));
if (buflen > PATH_MAX)
len = PATH_MAX;
else
len = buflen;
tmpbuffer = kmalloc(len, GFP_KERNEL);
if (tmpbuffer == NULL) {
kfree(full_path);
FreeXid(xid);
return -ENOMEM;
}
/* BB add read reparse point symlink code and
Unix extensions symlink code here BB */
/* We could disable this based on pTcon->unix_ext flag instead ... but why? */
if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
tmpbuffer,
len - 1,
cifs_sb->local_nls);
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
cERROR(1, ("SFU style symlinks not implemented yet"));
/* add open and read as in fs/cifs/inode.c */
} else {
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
OPEN_REPARSE_POINT, &fid, &oplock, NULL,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (!rc) {
rc = CIFSSMBQueryReparseLinkInfo(xid, pTcon, full_path,
tmpbuffer,
len - 1,
fid,
cifs_sb->local_nls);
if (CIFSSMBClose(xid, pTcon, fid)) {
cFYI(1, ("Error closing junction point "
"(open for ioctl)"));
}
/* If it is a DFS junction earlier we would have gotten
PATH_NOT_COVERED returned from server so we do
not need to request the DFS info here */
}
}
/* BB Anything else to do to handle recursive links? */
/* BB Should we be using page ops here? */
/* BB null terminate returned string in pBuffer? BB */
if (rc == 0) {
rc = vfs_readlink(direntry, pBuffer, len, tmpbuffer);
cFYI(1,
("vfs_readlink called from cifs_readlink returned %d",
rc));
}
kfree(tmpbuffer);
kfree(full_path);
FreeXid(xid);
return rc;
}
void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *cookie)
{
char *p = nd_get_link(nd);

71
fs/cifs/misc.c
View File

@ -635,77 +635,6 @@ dump_smb(struct smb_hdr *smb_buf, int smb_buf_length)
return;
}
/* Windows maps these to the user defined 16 bit Unicode range since they are
reserved symbols (along with \ and /), otherwise illegal to store
in filenames in NTFS */
#define UNI_ASTERIK (__u16) ('*' + 0xF000)
#define UNI_QUESTION (__u16) ('?' + 0xF000)
#define UNI_COLON (__u16) (':' + 0xF000)
#define UNI_GRTRTHAN (__u16) ('>' + 0xF000)
#define UNI_LESSTHAN (__u16) ('<' + 0xF000)
#define UNI_PIPE (__u16) ('|' + 0xF000)
#define UNI_SLASH (__u16) ('\\' + 0xF000)
/* Convert 16 bit Unicode pathname from wire format to string in current code
page. Conversion may involve remapping up the seven characters that are
only legal in POSIX-like OS (if they are present in the string). Path
names are little endian 16 bit Unicode on the wire */
int
cifs_convertUCSpath(char *target, const __le16 *source, int maxlen,
const struct nls_table *cp)
{
int i, j, len;
__u16 src_char;
for (i = 0, j = 0; i < maxlen; i++) {
src_char = le16_to_cpu(source[i]);
switch (src_char) {
case 0:
goto cUCS_out; /* BB check this BB */
case UNI_COLON:
target[j] = ':';
break;
case UNI_ASTERIK:
target[j] = '*';
break;
case UNI_QUESTION:
target[j] = '?';
break;
/* BB We can not handle remapping slash until
all the calls to build_path_from_dentry
are modified, as they use slash as separator BB */
/* case UNI_SLASH:
target[j] = '\\';
break;*/
case UNI_PIPE:
target[j] = '|';
break;
case UNI_GRTRTHAN:
target[j] = '>';
break;
case UNI_LESSTHAN:
target[j] = '<';
break;
default:
len = cp->uni2char(src_char, &target[j],
NLS_MAX_CHARSET_SIZE);
if (len > 0) {
j += len;
continue;
} else {
target[j] = '?';
}
}
j++;
/* make sure we do not overrun callers allocated temp buffer */
if (j >= (2 * NAME_MAX))
break;
}
cUCS_out:
target[j] = 0;
return j;
}
/* Convert 16 bit Unicode pathname to wire format from string in current code
page. Conversion may involve remapping up the seven characters that are
only legal in POSIX-like OS (if they are present in the string). Path

2
fs/cifs/netmisc.c
View File

@ -79,6 +79,7 @@ static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
{ErrQuota, -EDQUOT},
{ErrNotALink, -ENOLINK},
{ERRnetlogonNotStarted, -ENOPROTOOPT},
{ERRsymlink, -EOPNOTSUPP},
{ErrTooManyLinks, -EMLINK},
{0, 0}
};
@ -714,6 +715,7 @@ static const struct {
ERRDOS, ERRnoaccess, 0xc000028f}, {
ERRDOS, ERRnoaccess, 0xc0000290}, {
ERRDOS, ERRbadfunc, 0xc000029c}, {
ERRDOS, ERRsymlink, NT_STATUS_STOPPED_ON_SYMLINK}, {
ERRDOS, ERRinvlevel, 0x007c0001}, };
/*****************************************************************************

9
fs/cifs/nterr.h
View File

@ -35,8 +35,6 @@ struct nt_err_code_struct {
extern const struct nt_err_code_struct nt_errs[];
/* Win32 Status codes. */
#define STATUS_BUFFER_OVERFLOW 0x80000005
#define STATUS_MORE_ENTRIES 0x0105
#define ERROR_INVALID_PARAMETER 0x0057
#define ERROR_INSUFFICIENT_BUFFER 0x007a
@ -50,6 +48,13 @@ extern const struct nt_err_code_struct nt_errs[];
#define STATUS_SOME_UNMAPPED 0x0107
#define STATUS_BUFFER_OVERFLOW 0x80000005
#define NT_STATUS_NO_MORE_ENTRIES 0x8000001a
#define NT_STATUS_MEDIA_CHANGED 0x8000001c
#define NT_STATUS_END_OF_MEDIA 0x8000001e
#define NT_STATUS_MEDIA_CHECK 0x80000020
#define NT_STATUS_NO_DATA_DETECTED 0x8000001c
#define NT_STATUS_STOPPED_ON_SYMLINK 0x8000002d
#define NT_STATUS_DEVICE_REQUIRES_CLEANING 0x80000288
#define NT_STATUS_DEVICE_DOOR_OPEN 0x80000288
#define NT_STATUS_UNSUCCESSFUL 0xC0000000 | 0x0001
#define NT_STATUS_NOT_IMPLEMENTED 0xC0000000 | 0x0002
#define NT_STATUS_INVALID_INFO_CLASS 0xC0000000 | 0x0003

68
fs/cifs/ntlmssp.h
View File

@ -27,29 +27,39 @@
#define UnknownMessage cpu_to_le32(8)
/* Negotiate Flags */
#define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are in unicode */
#define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */
#define NTLMSSP_REQUEST_TARGET 0x04 /* Server return its auth realm */
#define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signature capability */
#define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */
#define NTLMSSP_NEGOTIATE_DGRAM 0x0040
#define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Sign/seal use LM session key */
#define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */
#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000
#define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */
#define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */
#define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */
/* define reserved9 0x08 */
#define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */
#define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */
#define NTLMSSP_NEGOTIATE_DGRAM 0x0040
#define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */
/* defined reserved 8 0x0100 */
#define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */
#define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */
#define NTLMSSP_ANONYMOUS 0x0800
#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
#define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server on same machine */
#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign for all security levels */
#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
#define NTLMSSP_TARGET_TYPE_SHARE 0x40000
#define NTLMSSP_NEGOTIATE_NTLMV2 0x80000
#define NTLMSSP_REQUEST_INIT_RESP 0x100000
#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000
#define NTLMSSP_REQUEST_NOT_NT_KEY 0x400000
#define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */
#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */
#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
#define NTLMSSP_TARGET_TYPE_SHARE 0x40000
#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
/* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */
#define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000
#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */
#define NTLMSSP_REQUEST_NON_NT_KEY 0x400000
#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
#define NTLMSSP_NEGOTIATE_128 0x20000000
#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
#define NTLMSSP_NEGOTIATE_56 0x80000000
/* #define reserved4 0x1000000 */
#define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */
/* #define reserved3 0x4000000 */
/* #define reserved2 0x8000000 */
/* #define reserved1 0x10000000 */
#define NTLMSSP_NEGOTIATE_128 0x20000000
#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
#define NTLMSSP_NEGOTIATE_56 0x80000000
/* Although typedefs are not commonly used for structure definitions */
/* in the Linux kernel, in this particular case they are useful */
@ -60,32 +70,36 @@
typedef struct _SECURITY_BUFFER {
__le16 Length;
__le16 MaximumLength;
__le32 Buffer; /* offset to buffer */
__le32 BufferOffset; /* offset to buffer */
} __attribute__((packed)) SECURITY_BUFFER;
typedef struct _NEGOTIATE_MESSAGE {
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* 1 */
__le32 MessageType; /* NtLmNegotiate = 1 */
__le32 NegotiateFlags;
SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */
SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */
/* SECURITY_BUFFER for version info not present since we
do not set the version is present flag */
char DomainString[0];
/* followed by WorkstationString */
} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
typedef struct _CHALLENGE_MESSAGE {
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* 2 */
__le32 MessageType; /* NtLmChallenge = 2 */
SECURITY_BUFFER TargetName;
__le32 NegotiateFlags;
__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
__u8 Reserved[8];
SECURITY_BUFFER TargetInfoArray;
/* SECURITY_BUFFER for version info not present since we
do not set the version is present flag */
} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
typedef struct _AUTHENTICATE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
__le32 MessageType; /* 3 */
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* NtLmsAuthenticate = 3 */
SECURITY_BUFFER LmChallengeResponse;
SECURITY_BUFFER NtChallengeResponse;
SECURITY_BUFFER DomainName;
@ -93,5 +107,7 @@ typedef struct _AUTHENTICATE_MESSAGE {
SECURITY_BUFFER WorkstationName;
SECURITY_BUFFER SessionKey;
__le32 NegotiateFlags;
/* SECURITY_BUFFER for version info not present since we
do not set the version is present flag */
char UserString[0];
} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;

72
fs/cifs/readdir.c
View File

@ -31,6 +31,13 @@
#include "cifs_fs_sb.h"
#include "cifsfs.h"
/*
* To be safe - for UCS to UTF-8 with strings loaded with the rare long
* characters alloc more to account for such multibyte target UTF-8
* characters.
*/
#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
#ifdef CONFIG_CIFS_DEBUG2
static void dump_cifs_file_struct(struct file *file, char *label)
{
@ -438,6 +445,38 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
}
}
/* BB eventually need to add the following helper function to
resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
we try to do FindFirst on (NTFS) directory symlinks */
/*
int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
int xid)
{
__u16 fid;
int len;
int oplock = 0;
int rc;
struct cifsTconInfo *ptcon = cifs_sb->tcon;
char *tmpbuffer;
rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
OPEN_REPARSE_POINT, &fid, &oplock, NULL,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if (!rc) {
tmpbuffer = kmalloc(maxpath);
rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
tmpbuffer,
maxpath -1,
fid,
cifs_sb->local_nls);
if (CIFSSMBClose(xid, ptcon, fid)) {
cFYI(1, ("Error closing temporary reparsepoint open)"));
}
}
}
*/
static int initiate_cifs_search(const int xid, struct file *file)
{
int rc = 0;
@ -493,7 +532,10 @@ ffirst_retry:
CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
if (rc == 0)
cifsFile->invalidHandle = false;
if ((rc == -EOPNOTSUPP) &&
/* BB add following call to handle readdir on new NTFS symlink errors
else if STATUS_STOPPED_ON_SYMLINK
call get_symlink_reparse_path and retry with new path */
else if ((rc == -EOPNOTSUPP) &&
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
goto ffirst_retry;
@ -822,7 +864,7 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
/* inode num, inode type and filename returned */
static int cifs_get_name_from_search_buf(struct qstr *pqst,
char *current_entry, __u16 level, unsigned int unicode,
struct cifs_sb_info *cifs_sb, int max_len, __u64 *pinum)
struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)
{
int rc = 0;
unsigned int len = 0;
@ -881,14 +923,12 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
}
if (unicode) {
/* BB fixme - test with long names */
/* Note converted filename can be longer than in unicode */
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
pqst->len = cifs_convertUCSpath((char *)pqst->name,
(__le16 *)filename, len/2, nlt);
else
pqst->len = cifs_strfromUCS_le((char *)pqst->name,
(__le16 *)filename, len/2, nlt);
pqst->len = cifs_from_ucs2((char *) pqst->name,
(__le16 *) filename,
UNICODE_NAME_MAX,
min(len, max_len), nlt,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
} else {
pqst->name = filename;
pqst->len = len;
@ -898,8 +938,8 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
return rc;
}
static int cifs_filldir(char *pfindEntry, struct file *file,
filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
void *direntry, char *scratch_buf, unsigned int max_len)
{
int rc = 0;
struct qstr qstring;
@ -996,7 +1036,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
int num_to_fill = 0;
char *tmp_buf = NULL;
char *end_of_smb;
int max_len;
unsigned int max_len;
xid = GetXid();
@ -1070,11 +1110,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
cifsFile->srch_inf.ntwrk_buf_start);
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
/* To be safe - for UCS to UTF-8 with strings loaded
with the rare long characters alloc more to account for
such multibyte target UTF-8 characters. cifs_unicode.c,
which actually does the conversion, has the same limit */
tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
if (current_entry == NULL) {
/* evaluate whether this case is an error */

340
fs/cifs/sess.c
View File

@ -3,7 +3,7 @@
*
* SMB/CIFS session setup handling routines
*
* Copyright (c) International Business Machines Corp., 2006, 2007
* Copyright (c) International Business Machines Corp., 2006, 2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
@ -111,7 +111,7 @@ static __le16 get_next_vcnum(struct cifsSesInfo *ses)
get_vc_num_exit:
write_unlock(&cifs_tcp_ses_lock);
return le16_to_cpu(vcnum);
return cpu_to_le16(vcnum);
}
static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB)
@ -277,12 +277,11 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
*pbcc_area = bcc_ptr;
}
static int decode_unicode_ssetup(char **pbcc_area, int bleft,
struct cifsSesInfo *ses,
const struct nls_table *nls_cp)
static void
decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses,
const struct nls_table *nls_cp)
{
int rc = 0;
int words_left, len;
int len;
char *data = *pbcc_area;
cFYI(1, ("bleft %d", bleft));
@ -300,63 +299,29 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
++bleft;
}
words_left = bleft / 2;
/* save off server operating system */
len = UniStrnlen((wchar_t *) data, words_left);
if (len >= words_left)
return rc;
kfree(ses->serverOS);
/* UTF-8 string will not grow more than four times as big as UCS-16 */
ses->serverOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
if (ses->serverOS != NULL) {
cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
cFYI(1, ("serverOS=%s", ses->serverOS));
}
data += 2 * (len + 1);
words_left -= len + 1;
/* save off server network operating system */
len = UniStrnlen((wchar_t *) data, words_left);
if (len >= words_left)
return rc;
ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
cFYI(1, ("serverOS=%s", ses->serverOS));
len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
data += len;
bleft -= len;
if (bleft <= 0)
return;
kfree(ses->serverNOS);
ses->serverNOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
if (ses->serverNOS != NULL) {
cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
nls_cp);
cFYI(1, ("serverNOS=%s", ses->serverNOS));
if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) {
cFYI(1, ("NT4 server"));
ses->flags |= CIFS_SES_NT4;
}
}
data += 2 * (len + 1);
words_left -= len + 1;
/* save off server domain */
len = UniStrnlen((wchar_t *) data, words_left);
if (len > words_left)
return rc;
ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
cFYI(1, ("serverNOS=%s", ses->serverNOS));
len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
data += len;
bleft -= len;
if (bleft <= 0)
return;
kfree(ses->serverDomain);
ses->serverDomain = kzalloc((4 * len) + 2, GFP_KERNEL);
if (ses->serverDomain != NULL) {
cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len,
nls_cp);
cFYI(1, ("serverDomain=%s", ses->serverDomain));
}
data += 2 * (len + 1);
words_left -= len + 1;
ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
cFYI(1, ("serverDomain=%s", ses->serverDomain));
cFYI(1, ("words left: %d", words_left));
return rc;
return;
}
static int decode_ascii_ssetup(char **pbcc_area, int bleft,
@ -413,6 +378,186 @@ static int decode_ascii_ssetup(char **pbcc_area, int bleft,
return rc;
}
static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
struct cifsSesInfo *ses)
{
CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
cERROR(1, ("challenge blob len %d too small", blob_len));
return -EINVAL;
}
if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
cERROR(1, ("blob signature incorrect %s", pblob->Signature));
return -EINVAL;
}
if (pblob->MessageType != NtLmChallenge) {
cERROR(1, ("Incorrect message type %d", pblob->MessageType));
return -EINVAL;
}
memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
/* BB we could decode pblob->NegotiateFlags; some may be useful */
/* In particular we can examine sign flags */
/* BB spec says that if AvId field of MsvAvTimestamp is populated then
we must set the MIC field of the AUTHENTICATE_MESSAGE */
return 0;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
/* BB Move to ntlmssp.c eventually */
/* We do not malloc the blob, it is passed in pbuffer, because
it is fixed size, and small, making this approach cleaner */
static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
struct cifsSesInfo *ses)
{
NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
__u32 flags;
memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
sec_blob->MessageType = NtLmNegotiate;
/* BB is NTLMV2 session security format easier to use here? */
flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
if (ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
flags |= NTLMSSP_NEGOTIATE_SIGN;
if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
sec_blob->NegotiateFlags |= cpu_to_le32(flags);
sec_blob->WorkstationName.BufferOffset = 0;
sec_blob->WorkstationName.Length = 0;
sec_blob->WorkstationName.MaximumLength = 0;
/* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
sec_blob->DomainName.BufferOffset = 0;
sec_blob->DomainName.Length = 0;
sec_blob->DomainName.MaximumLength = 0;
}
/* We do not malloc the blob, it is passed in pbuffer, because its
maximum possible size is fixed and small, making this approach cleaner.
This function returns the length of the data in the blob */
static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
struct cifsSesInfo *ses,
const struct nls_table *nls_cp, int first)
{
AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
__u32 flags;
unsigned char *tmp;
char ntlm_session_key[CIFS_SESS_KEY_SIZE];
memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
sec_blob->MessageType = NtLmAuthenticate;
flags = NTLMSSP_NEGOTIATE_56 |
NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
if (ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
flags |= NTLMSSP_NEGOTIATE_SIGN;
if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
sec_blob->NegotiateFlags |= cpu_to_le32(flags);
sec_blob->LmChallengeResponse.BufferOffset =
cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
sec_blob->LmChallengeResponse.Length = 0;
sec_blob->LmChallengeResponse.MaximumLength = 0;
/* calculate session key, BB what about adding similar ntlmv2 path? */
SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key);
if (first)
cifs_calculate_mac_key(&ses->server->mac_signing_key,
ntlm_session_key, ses->password);
memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE);
sec_blob->NtChallengeResponse.MaximumLength =
cpu_to_le16(CIFS_SESS_KEY_SIZE);
tmp += CIFS_SESS_KEY_SIZE;
if (ses->domainName == NULL) {
sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->DomainName.Length = 0;
sec_blob->DomainName.MaximumLength = 0;
tmp += 2;
} else {
int len;
len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
MAX_USERNAME_SIZE, nls_cp);
len *= 2; /* unicode is 2 bytes each */
len += 2; /* trailing null */
sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->DomainName.Length = cpu_to_le16(len);
sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
tmp += len;
}
if (ses->userName == NULL) {
sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->UserName.Length = 0;
sec_blob->UserName.MaximumLength = 0;
tmp += 2;
} else {
int len;
len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
MAX_USERNAME_SIZE, nls_cp);
len *= 2; /* unicode is 2 bytes each */
len += 2; /* trailing null */
sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->UserName.Length = cpu_to_le16(len);
sec_blob->UserName.MaximumLength = cpu_to_le16(len);
tmp += len;
}
sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->WorkstationName.Length = 0;
sec_blob->WorkstationName.MaximumLength = 0;
tmp += 2;
sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->SessionKey.Length = 0;
sec_blob->SessionKey.MaximumLength = 0;
return tmp - pbuffer;
}
static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
struct cifsSesInfo *ses)
{
build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
return;
}
static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB,
struct cifsSesInfo *ses,
const struct nls_table *nls, int first_time)
{
int bloblen;
bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls,
first_time);
pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen);
return bloblen;
}
#endif
int
CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
const struct nls_table *nls_cp)
@ -431,6 +576,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
__u16 action;
int bytes_remaining;
struct key *spnego_key = NULL;
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
if (ses == NULL)
return -EINVAL;
@ -438,6 +584,10 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
type = ses->server->secType;
cFYI(1, ("sess setup type %d", type));
ssetup_ntlmssp_authenticate:
if (phase == NtLmChallenge)
phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
if (type == LANMAN) {
#ifndef CONFIG_CIFS_WEAK_PW_HASH
/* LANMAN and plaintext are less secure and off by default.
@ -651,9 +801,53 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
goto ssetup_exit;
#endif /* CONFIG_CIFS_UPCALL */
} else {
#ifdef CONFIG_CIFS_EXPERIMENTAL
if ((experimEnabled > 1) && (type == RawNTLMSSP)) {
if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
cERROR(1, ("NTLMSSP requires Unicode support"));
rc = -ENOSYS;
goto ssetup_exit;
}
cFYI(1, ("ntlmssp session setup phase %d", phase));
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
capabilities |= CAP_EXTENDED_SECURITY;
pSMB->req.Capabilities |= cpu_to_le32(capabilities);
if (phase == NtLmNegotiate) {
setup_ntlmssp_neg_req(pSMB, ses);
iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
} else if (phase == NtLmAuthenticate) {
int blob_len;
blob_len = setup_ntlmssp_auth_req(pSMB, ses,
nls_cp,
first_time);
iov[1].iov_len = blob_len;
/* Make sure that we tell the server that we
are using the uid that it just gave us back
on the response (challenge) */
smb_buf->Uid = ses->Suid;
} else {
cERROR(1, ("invalid phase %d", phase));
rc = -ENOSYS;
goto ssetup_exit;
}
iov[1].iov_base = &pSMB->req.SecurityBlob[0];
/* unicode strings must be word aligned */
if ((iov[0].iov_len + iov[1].iov_len) % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_oslm_strings(&bcc_ptr, nls_cp);
} else {
cERROR(1, ("secType %d not supported!", type));
rc = -ENOSYS;
goto ssetup_exit;
}
#else
cERROR(1, ("secType %d not supported!", type));
rc = -ENOSYS;
goto ssetup_exit;
#endif
}
iov[2].iov_base = str_area;
@ -669,12 +863,23 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
/* SMB request buf freed in SendReceive2 */
cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
if (rc)
goto ssetup_exit;
pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
smb_buf = (struct smb_hdr *)iov[0].iov_base;
if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
if (phase != NtLmNegotiate) {
cERROR(1, ("Unexpected more processing error"));
goto ssetup_exit;
}
/* NTLMSSP Negotiate sent now processing challenge (response) */
phase = NtLmChallenge; /* process ntlmssp challenge */
rc = 0; /* MORE_PROC rc is not an error here, but expected */
}
if (rc)
goto ssetup_exit;
if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
rc = -EIO;
cERROR(1, ("bad word count %d", smb_buf->WordCount));
@ -693,12 +898,18 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
if (smb_buf->WordCount == 4) {
__u16 blob_len;
blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
bcc_ptr += blob_len;
if (blob_len > bytes_remaining) {
cERROR(1, ("bad security blob length %d", blob_len));
rc = -EINVAL;
goto ssetup_exit;
}
if (phase == NtLmChallenge) {
rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
/* now goto beginning for ntlmssp authenticate phase */
if (rc)
goto ssetup_exit;
}
bcc_ptr += blob_len;
bytes_remaining -= blob_len;
}
@ -709,8 +920,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
++bcc_ptr;
--bytes_remaining;
}
rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
} else {
rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
@ -728,5 +938,9 @@ ssetup_exit:
} else if (resp_buf_type == CIFS_LARGE_BUFFER)
cifs_buf_release(iov[0].iov_base);
/* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
if ((phase == NtLmChallenge) && (rc == 0))
goto ssetup_ntlmssp_authenticate;
return rc;
}

1
fs/cifs/smberr.h
View File

@ -110,6 +110,7 @@
/* Below errors are used internally (do not come over the wire) for passthrough
from STATUS codes to POSIX only */
#define ERRsymlink 0xFFFD
#define ErrTooManyLinks 0xFFFE
/* Following error codes may be generated with the ERRSRV error class.*/

19
include/linux/nls.h
View File

@ -58,6 +58,25 @@ static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1,
return 0;
}
/*
* nls_nullsize - return length of null character for codepage
* @codepage - codepage for which to return length of NULL terminator
*
* Since we can't guarantee that the null terminator will be a particular
* length, we have to check against the codepage. If there's a problem
* determining it, assume a single-byte NULL terminator.
*/
static inline int
nls_nullsize(const struct nls_table *codepage)
{
int charlen;
char tmp[NLS_MAX_CHARSET_SIZE];
charlen = codepage->uni2char(0, tmp, NLS_MAX_CHARSET_SIZE);
return charlen > 0 ? charlen : 1;
}
#define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name))
#endif /* _LINUX_NLS_H */