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authorKees Cook <keescook@chromium.org>2013-01-11 14:32:05 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-17 08:46:22 -0800
commit2edbcdd71ca6c7751171221a559efcc3694c3694 (patch)
tree0b8613eb5cd1f5bad3e549c4150b4c7b07024931 /kernel
parent08d73254896be6d2dfa26df0a599424984ecb8c7 (diff)
audit: create explicit AUDIT_SECCOMP event type
commit 7b9205bd775afc4439ed86d617f9042ee9e76a71 upstream. The seccomp path was using AUDIT_ANOM_ABEND from when seccomp mode 1 could only kill a process. While we still want to make sure an audit record is forced on a kill, this should use a separate record type since seccomp mode 2 introduces other behaviors. In the case of "handled" behaviors (process wasn't killed), only emit a record if the process is under inspection. This change also fixes userspace examination of seccomp audit events, since it was considered malformed due to missing fields of the AUDIT_ANOM_ABEND event type. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Cc: Jeff Layton <jlayton@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Julien Tinnes <jln@google.com> Acked-by: Will Drewry <wad@chromium.org> Acked-by: Steve Grubb <sgrubb@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/auditsc.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 2f186ed80c40..157e98990181 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2735,7 +2735,7 @@ void __audit_mmap_fd(int fd, int flags)
context->type = AUDIT_MMAP;
}
-static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
+static void audit_log_task(struct audit_buffer *ab)
{
kuid_t auid, uid;
kgid_t gid;
@@ -2753,6 +2753,11 @@ static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
audit_log_task_context(ab);
audit_log_format(ab, " pid=%d comm=", current->pid);
audit_log_untrustedstring(ab, current->comm);
+}
+
+static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
+{
+ audit_log_task(ab);
audit_log_format(ab, " reason=");
audit_log_string(ab, reason);
audit_log_format(ab, " sig=%ld", signr);
@@ -2783,8 +2788,11 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
{
struct audit_buffer *ab;
- ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
- audit_log_abend(ab, "seccomp", signr);
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_SECCOMP);
+ if (unlikely(!ab))
+ return;
+ audit_log_task(ab);
+ audit_log_format(ab, " sig=%ld", signr);
audit_log_format(ab, " syscall=%ld", syscall);
audit_log_format(ab, " compat=%d", is_compat_task());
audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current));