On Tue, May 17, 2022 at 6:33 AM Julian Orth <ju.orth(a)gmail.com> wrote:
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
Fixes: 5bd2182d58e9 ("audit,io_uring,io-wq: add some basic audit support to
io_uring")
Signed-off-by: Julian Orth <ju.orth(a)gmail.com>
---
include/linux/audit.h | 2 +-
kernel/auditsc.c | 6 ++++++
2 files changed, 7 insertions(+), 1 deletion(-)
Hi Julian,
Thanks for the report and the patch too! I agree that it does seem a
little odd that we haven't seen this before, let me dig into this a
bit more today and respond back.
--
paul-moore.com