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authorJulian Orth <ju.orth@gmail.com>2022-05-17 12:32:53 +0200
committerPaul Moore <paul@paul-moore.com>2022-05-17 15:03:36 -0400
commit69e9cd66ae1392437234a63a3a1d60b6655f92ef (patch)
tree72296aa53c30b631a5d99898780a84ad1d0baf5c /kernel
parent42226c989789d8da4af1de0c31070c96726d990c (diff)
audit,io_uring,io-wq: call __audit_uring_exit for dummy contexts
Not calling the function for dummy contexts will cause the context to not be reset. During the next syscall, this will cause an error in __audit_syscall_entry: WARN_ON(context->context != AUDIT_CTX_UNUSED); WARN_ON(context->name_count); if (context->context != AUDIT_CTX_UNUSED || context->name_count) { audit_panic("unrecoverable error in audit_syscall_entry()"); return; } These problematic dummy contexts are created via the following call chain: exit_to_user_mode_prepare -> arch_do_signal_or_restart -> get_signal -> task_work_run -> tctx_task_work -> io_req_task_submit -> io_issue_sqe -> audit_uring_entry Cc: stable@vger.kernel.org Fixes: 5bd2182d58e9 ("audit,io_uring,io-wq: add some basic audit support to io_uring") Signed-off-by: Julian Orth <ju.orth@gmail.com> [PM: subject line tweaks] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/auditsc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ea2ee1181921..f3a2abd6d1a1 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1959,6 +1959,12 @@ void __audit_uring_exit(int success, long code)
{
struct audit_context *ctx = audit_context();
+ if (ctx->dummy) {
+ if (ctx->context != AUDIT_CTX_URING)
+ return;
+ goto out;
+ }
+
if (ctx->context == AUDIT_CTX_SYSCALL) {
/*
* NOTE: See the note in __audit_uring_entry() about the case