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audit: deliver signal_info regarless of syscall

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When a process signals the audit daemon (shutdown, rotate, resume,
reconfig) but syscall auditing is not enabled, we still want to know the
identity of the process sending the signal to the audit daemon.

Move audit_signal_info() out of syscall auditing to general auditing but
create a new function audit_signal_info_syscall() to take care of the
syscall dependent parts for when syscall auditing is enabled.

Please see the github kernel audit issue
https://github.com/linux-audit/audit-kernel/issues/111

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Guy Briggs 2019-05-10 12:21:49 -04:00 • committed by Paul Moore
parent a188339ca5
commit b48345aafb
5 changed files with 46 additions and 19 deletions
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9
include/linux/audit.h
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@ -196,6 +196,9 @@ static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
}
extern u32 audit_enabled;
extern int audit_signal_info(int sig, struct task_struct *t);
#else /* CONFIG_AUDIT */
static inline __printf(4, 5)
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
@ -249,6 +252,12 @@ static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
}
#define audit_enabled AUDIT_OFF
static inline int audit_signal_info(int sig, struct task_struct *t)
{
return 0;
}
#endif /* CONFIG_AUDIT */
#ifdef CONFIG_AUDIT_COMPAT_GENERIC