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Orangefs: cleanups and a strncpy vulnerability fix.

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Cleanups:
 
   - remove an unused variable from orangefs_readdir.
   - clean up printk wrapper used for ofs "gossip" debugging.
   - clean up truncate ctime and mtime setting in inode.c
   - remove a useless null check found by coccinelle.
   - optimize some memcpy/memset boilerplate code.
   - remove some useless sanity checks from xattr.c
 
 Fix:
 
   - fix a potential strncpy vulnerability.
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Merge tag 'for-linus-4.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs fixes from Mike Marshall:
 "Orangefs cleanups and a strncpy vulnerability fix.

  Cleanups:
   - remove an unused variable from orangefs_readdir.
   - clean up printk wrapper used for ofs "gossip" debugging.
   - clean up truncate ctime and mtime setting in inode.c
   - remove a useless null check found by coccinelle.
   - optimize some memcpy/memset boilerplate code.
   - remove some useless sanity checks from xattr.c

  Fix:
   - fix a potential strncpy vulnerability"

* tag 'for-linus-4.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: remove unused variable
  orangefs: Add KERN_<LEVEL> to gossip_<level> macros
  orangefs: strncpy -> strscpy
  orangefs: clean up truncate ctime and mtime setting
  Orangefs: fix ifnullfree.cocci warnings
  Orangefs: optimize boilerplate code.
  Orangefs: xattr.c cleanup
This commit is contained in:
Linus Torvalds 2016-04-09 10:33:58 -07:00
commit 6759212640
6 changed files with 27 additions and 52 deletions
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4
fs/orangefs/dir.c
View File

@ -153,7 +153,6 @@ static int orangefs_readdir(struct file *file, struct dir_context *ctx)
struct dentry *dentry = file->f_path.dentry;
struct orangefs_kernel_op_s *new_op = NULL;
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(dentry->d_inode);
int buffer_full = 0;
struct orangefs_readdir_response_s readdir_response;
void *dents_buf;
int i = 0;
@ -350,8 +349,7 @@ get_new_buffer_index:
/*
* Did we hit the end of the directory?
*/
if (readdir_response.token == ORANGEFS_READDIR_END &&
!buffer_full) {
if (readdir_response.token == ORANGEFS_READDIR_END) {
gossip_debug(GOSSIP_DIR_DEBUG,
"End of dir detected; setting ctx->pos to ORANGEFS_READDIR_END.\n");
ctx->pos = ORANGEFS_READDIR_END;

16
fs/orangefs/inode.c
View File

@ -204,22 +204,8 @@ static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
if (ret != 0)
return ret;
/*
* Only change the c/mtime if we are changing the size or we are
* explicitly asked to change it. This handles the semantic difference
* between truncate() and ftruncate() as implemented in the VFS.
*
* The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
* special case where we need to update the times despite not having
* these flags set. For all other operations the VFS set these flags
* explicitly if it wants a timestamp update.
*/
if (orig_size != i_size_read(inode) &&
!(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
iattr->ia_ctime = iattr->ia_mtime =
current_fs_time(inode->i_sb);
if (orig_size != i_size_read(inode))
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
}
return ret;
}

3
fs/orangefs/orangefs-debugfs.c
View File

@ -126,8 +126,7 @@ out:
void orangefs_debugfs_cleanup(void)
{
if (debug_dir)
debugfs_remove_recursive(debug_dir);
debugfs_remove_recursive(debug_dir);
}
/* open ORANGEFS_KMOD_DEBUG_HELP_FILE */

6
fs/orangefs/orangefs-utils.c
View File

@ -315,9 +315,13 @@ int orangefs_inode_getattr(struct inode *inode, int new, int size)
inode->i_size = (loff_t)strlen(new_op->
downcall.resp.getattr.link_target);
orangefs_inode->blksize = (1 << inode->i_blkbits);
strlcpy(orangefs_inode->link_target,
ret = strscpy(orangefs_inode->link_target,
new_op->downcall.resp.getattr.link_target,
ORANGEFS_NAME_MAX);
if (ret == -E2BIG) {
ret = -EIO;
goto out;
}
inode->i_link = orangefs_inode->link_target;
}
break;

31
fs/orangefs/protocol.h
View File

@ -1,3 +1,4 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock_types.h>
#include <linux/slab.h>
@ -74,8 +75,8 @@ static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
void *p, int size)
{
memset(p, 0, size);
memcpy(p, kh->u, 16);
memset(p + 16, 0, size - 16);
}
@ -427,26 +428,28 @@ struct ORANGEFS_dev_map_desc {
/* gossip.h *****************************************************************/
#ifdef GOSSIP_DISABLE_DEBUG
#define gossip_debug(mask, format, f...) do {} while (0)
#define gossip_debug(mask, fmt, ...) \
do { \
if (0) \
printk(KERN_DEBUG fmt, ##__VA_ARGS__); \
} while (0)
#else
extern __u64 gossip_debug_mask;
extern struct client_debug_mask client_debug_mask;
/* try to avoid function call overhead by checking masks in macro */
#define gossip_debug(mask, format, f...) \
do { \
if (gossip_debug_mask & mask) \
printk(format, ##f); \
#define gossip_debug(mask, fmt, ...) \
do { \
if (gossip_debug_mask & (mask)) \
printk(KERN_DEBUG fmt, ##__VA_ARGS__); \
} while (0)
#endif /* GOSSIP_DISABLE_DEBUG */
/* do file and line number printouts w/ the GNU preprocessor */
#define gossip_ldebug(mask, format, f...) \
gossip_debug(mask, "%s: " format, __func__, ##f)
#define gossip_ldebug(mask, fmt, ...) \
gossip_debug(mask, "%s: " fmt, __func__, ##__VA_ARGS__)
#define gossip_err printk
#define gossip_lerr(format, f...) \
gossip_err("%s line %d: " format, \
__FILE__, \
__LINE__, \
##f)
#define gossip_err pr_err
#define gossip_lerr(fmt, ...) \
gossip_err("%s line %d: " fmt, \
__FILE__, __LINE__, ##__VA_ARGS__)

19
fs/orangefs/xattr.c
View File

@ -73,10 +73,6 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *prefix,
"%s: prefix %s name %s, buffer_size %zd\n",
__func__, prefix, name, size);
if (name == NULL || (size > 0 && buffer == NULL)) {
gossip_err("orangefs_inode_getxattr: bogus NULL pointers\n");
return -EINVAL;
}
if ((strlen(name) + strlen(prefix)) >= ORANGEFS_MAX_XATTR_NAMELEN) {
gossip_err("Invalid key length (%d)\n",
(int)(strlen(name) + strlen(prefix)));
@ -146,8 +142,8 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *prefix,
goto out_release_op;
}
memset(buffer, 0, size);
memcpy(buffer, new_op->downcall.resp.getxattr.val, length);
memset(buffer + length, 0, size - length);
gossip_debug(GOSSIP_XATTR_DEBUG,
"orangefs_inode_getxattr: inode %pU "
"key %s key_sz %d, val_len %d\n",
@ -239,8 +235,7 @@ int orangefs_inode_setxattr(struct inode *inode, const char *prefix,
"%s: prefix %s, name %s, buffer_size %zd\n",
__func__, prefix, name, size);
if (size < 0 ||
size >= ORANGEFS_MAX_XATTR_VALUELEN ||
if (size >= ORANGEFS_MAX_XATTR_VALUELEN ||
flags < 0) {
gossip_err("orangefs_inode_setxattr: bogus values of size(%d), flags(%d)\n",
(int)size,
@ -248,12 +243,6 @@ int orangefs_inode_setxattr(struct inode *inode, const char *prefix,
return -EINVAL;
}
if (name == NULL ||
(size > 0 && value == NULL)) {
gossip_err("orangefs_inode_setxattr: bogus NULL pointers!\n");
return -EINVAL;
}
internal_flag = convert_to_internal_xattr_flags(flags);
if (prefix) {
@ -353,10 +342,6 @@ ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size)
gossip_err("%s: bogus NULL pointers\n", __func__);
return -EINVAL;
}
if (size < 0) {
gossip_err("Invalid size (%d)\n", (int)size);
return -EINVAL;
}
down_read(&orangefs_inode->xattr_sem);
new_op = op_alloc(ORANGEFS_VFS_OP_LISTXATTR);