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| author | Tyler Hicks | 2013-07-26 03:02:55 +0200 |
|---|---|---|
| committer | Eric Paris | 2013-11-05 17:07:23 +0100 |
| commit | 0868a5e150bc4c47e7a003367cd755811eb41e0b (patch) | |
| tree | 627c65016b3046c60741dd62d67b0ef84cadc715 /kernel/audit.c | |
| parent | audit_alloc: clear TIF_SYSCALL_AUDIT if !audit_context (diff) | |
| download | kernel-qcow2-linux-0868a5e150bc4c47e7a003367cd755811eb41e0b.tar.gz kernel-qcow2-linux-0868a5e150bc4c47e7a003367cd755811eb41e0b.tar.xz kernel-qcow2-linux-0868a5e150bc4c47e7a003367cd755811eb41e0b.zip | |
audit: printk USER_AVC messages when audit isn't enabled
When the audit=1 kernel parameter is absent and auditd is not running,
AUDIT_USER_AVC messages are being silently discarded.
AUDIT_USER_AVC messages should be sent to userspace using printk(), as
mentioned in the commit message of 4a4cd633 ("AUDIT: Optimise the
audit-disabled case for discarding user messages").
When audit_enabled is 0, audit_receive_msg() discards all user messages
except for AUDIT_USER_AVC messages. However, audit_log_common_recv_msg()
refuses to allocate an audit_buffer if audit_enabled is 0. The fix is to
special case AUDIT_USER_AVC messages in both functions.
It looks like commit 50397bd1 ("[AUDIT] clean up audit_receive_msg()")
introduced this bug.
Cc: <stable@kernel.org> # v2.6.25+
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: linux-audit@redhat.com
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 02b1b7875c92..74550ff3644f 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -612,7 +612,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) int rc = 0; uid_t uid = from_kuid(&init_user_ns, current_uid()); - if (!audit_enabled) { + if (!audit_enabled && msg_type != AUDIT_USER_AVC) { *ab = NULL; return rc; } |