diff options
| author | Steve Grubb <sgrubb@redhat.com> | 2007-04-19 10:28:21 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2007-05-11 05:38:26 -0400 |
| commit | 0a4ff8c2598b72f2fa9d50aae9e1809e684dbf41 (patch) | |
| tree | 309f2b2b5874692302862534cd9052a1d96018ba | |
| parent | 5712e88f2b0f626a4857c24128810bbf8ce09537 (diff) | |
[PATCH] Abnormal End of Processes
Hi,
I have been working on some code that detects abnormal events based on audit
system events. One kind of event that we currently have no visibility for is
when a program terminates due to segfault - which should never happen on a
production machine. And if it did, you'd want to investigate it. Attached is a
patch that collects these events and sends them into the audit system.
Signed-off-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/exec.c | 2 | ||||
| -rw-r--r-- | include/linux/audit.h | 3 | ||||
| -rw-r--r-- | kernel/auditsc.c | 39 |
3 files changed, 44 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c index 1ba85c7fc6af..7cf078ec758e 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1488,6 +1488,8 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs) int flag = 0; int ispipe = 0; + audit_core_dumps(signr); + binfmt = current->binfmt; if (!binfmt || !binfmt->core_dump) goto fail; diff --git a/include/linux/audit.h b/include/linux/audit.h index 22976ddbd264..fccc6e50298a 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -112,6 +112,7 @@ #define AUDIT_FIRST_KERN_ANOM_MSG 1700 #define AUDIT_LAST_KERN_ANOM_MSG 1799 #define AUDIT_ANOM_PROMISCUOUS 1700 /* Device changed promiscuous mode */ +#define AUDIT_ANOM_ABEND 1701 /* Process ended abnormally */ #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */ @@ -377,6 +378,7 @@ static inline void audit_inode_child(const char *dname, if (unlikely(!audit_dummy_context())) __audit_inode_child(dname, inode, parent); } +void audit_core_dumps(long signr); static inline void audit_ptrace(struct task_struct *t) { @@ -467,6 +469,7 @@ extern int audit_signals; #define __audit_inode_child(d,i,p) do { ; } while (0) #define audit_inode(n,i) do { ; } while (0) #define audit_inode_child(d,i,p) do { ; } while (0) +#define audit_core_dumps(i) do { ; } while (0) #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0) #define audit_get_loginuid(c) ({ -1; }) #define audit_log_task_context(b) do { ; } while (0) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 5276b7ef05f1..e36481ed61b4 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2037,3 +2037,42 @@ int __audit_signal_info(int sig, struct task_struct *t) return 0; } + +/** + * audit_core_dumps - record information about processes that end abnormally + * @sig: signal value + * + * If a process ends with a core dump, something fishy is going on and we + * should record the event for investigation. + */ +void audit_core_dumps(long signr) +{ + struct audit_buffer *ab; + u32 sid; + + if (!audit_enabled) + return; + + if (signr == SIGQUIT) /* don't care for those */ + return; + + ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND); + audit_log_format(ab, "auid=%u uid=%u gid=%u", + audit_get_loginuid(current->audit_context), + current->uid, current->gid); + selinux_get_task_sid(current, &sid); + if (sid) { + char *ctx = NULL; + u32 len; + + if (selinux_sid_to_string(sid, &ctx, &len)) + audit_log_format(ab, " ssid=%u", sid); + else + audit_log_format(ab, " subj=%s", ctx); + kfree(ctx); + } + audit_log_format(ab, " pid=%d comm=", current->pid); + audit_log_untrustedstring(ab, current->comm); + audit_log_format(ab, " sig=%ld", signr); + audit_log_end(ab); +} |