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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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8
kernel/audit.h
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@@ -299,7 +299,7 @@ extern const char *audit_tree_path(struct audit_tree *tree);
extern void audit_put_tree(struct audit_tree *tree);
extern void audit_kill_trees(struct audit_context *context);
extern int audit_signal_info(int sig, struct task_struct *t);
extern int audit_signal_info_syscall(struct task_struct *t);
extern void audit_filter_inodes(struct task_struct *tsk,
struct audit_context *ctx);
extern struct list_head *audit_killed_trees(void);
@@ -330,7 +330,11 @@ extern struct list_head *audit_killed_trees(void);
#define audit_tree_path(rule) "" /* never called */
#define audit_kill_trees(context) BUG()
#define audit_signal_info(s, t) AUDIT_DISABLED
static inline int audit_signal_info_syscall(struct task_struct *t)
{
return 0;
}
#define audit_filter_inodes(t, c) AUDIT_DISABLED
#endif /* CONFIG_AUDITSYSCALL */