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integrity: Add errno field in audit message

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Error code is not included in the audit messages logged by
the integrity subsystem.

Define a new function integrity_audit_message() that takes error code
in the "errno" parameter. Add "errno" field in the audit messages logged
by the integrity subsystem and set the value passed in the "errno"
parameter.

[    6.303048] audit: type=1804 audit(1592506281.627:2): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=kernel op=measuring_key cause=ENOMEM comm="swapper/0" name=".builtin_trusted_keys" res=0 errno=-12

[    7.987647] audit: type=1802 audit(1592506283.312:9): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=policy_update cause=completed comm="systemd" res=1 errno=0

[    8.019432] audit: type=1804 audit(1592506283.344:10): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=measuring_kexec_cmdline cause=hashing_error comm="systemd" name="kexec-cmdline" res=0 errno=-22

Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Steve Grubb <sgrubb@redhat.com>
Suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Lakshmi Ramasubramanian 2020-06-18 14:10:11 -07:00 committed by Mimi Zohar
parent 20c59ce010
commit 2f845882ec
2 changed files with 23 additions and 1 deletions
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13
security/integrity/integrity.h
View File

@ -239,6 +239,11 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op, const unsigned char *fname, const char *op,
const char *cause, int result, int info); const char *cause, int result, int info);
void integrity_audit_message(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op,
const char *cause, int result, int info,
int errno);
static inline struct audit_buffer * static inline struct audit_buffer *
integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type) integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type)
{ {
@ -253,6 +258,14 @@ static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
{ {
} }
static inline void integrity_audit_message(int audit_msgno,
struct inode *inode,
const unsigned char *fname,
const char *op, const char *cause,
int result, int info, int errno)
{
}
static inline struct audit_buffer * static inline struct audit_buffer *
integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type) integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type)
{ {

11
security/integrity/integrity_audit.c
View File

@ -28,6 +28,15 @@ __setup("integrity_audit=", integrity_audit_setup);
void integrity_audit_msg(int audit_msgno, struct inode *inode, void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op, const unsigned char *fname, const char *op,
const char *cause, int result, int audit_info) const char *cause, int result, int audit_info)
{
integrity_audit_message(audit_msgno, inode, fname, op, cause,
result, audit_info, 0);
}
void integrity_audit_message(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op,
const char *cause, int result, int audit_info,
int errno)
{ {
struct audit_buffer *ab; struct audit_buffer *ab;
char name[TASK_COMM_LEN]; char name[TASK_COMM_LEN];
@ -53,6 +62,6 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
audit_log_untrustedstring(ab, inode->i_sb->s_id); audit_log_untrustedstring(ab, inode->i_sb->s_id);
audit_log_format(ab, " ino=%lu", inode->i_ino); audit_log_format(ab, " ino=%lu", inode->i_ino);
} }
audit_log_format(ab, " res=%d", !result); audit_log_format(ab, " res=%d errno=%d", !result, errno);
audit_log_end(ab); audit_log_end(ab);
} }