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authorTyler Hicks <tyhicks@canonical.com>2013-07-25 18:02:55 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-04 10:50:31 -0800
commite49ee6c66ebfdf4a4fb0cecad2523c7b61fc0282 (patch)
tree6106bc4fc818042ebfb97476a4a1c1cd04572ec9
parentd4bb402d7bda612a91235444dd4cf29b464f8eec (diff)
audit: printk USER_AVC messages when audit isn't enabled
commit 0868a5e150bc4c47e7a003367cd755811eb41e0b upstream. 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. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--kernel/audit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index 1c7f2c61416b..c6ed3f10114d 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -625,7 +625,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
char *ctx = NULL;
u32 len;
- if (!audit_enabled) {
+ if (!audit_enabled && msg_type != AUDIT_USER_AVC) {
*ab = NULL;
return rc;
}