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passt: Allow exit_group() system call in seccomp profiles

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We handle SIGQUIT and SIGTERM calling exit(), which is usually
implemented with the exit_group() system call.

If we don't allow exit_group(), we'll get a SIGSYS while handling
SIGQUIT and SIGTERM, which means a misleading non-zero exit code.

Reported-by: Wenli Quan <wquan@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2101990
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2022-07-13 03:36:09 +02:00
parent 17689cc9bf
commit 1d223e4b4c
3 changed files with 4 additions and 2 deletions

2
passt.c
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@ -257,6 +257,8 @@ static int sandbox(struct ctx *c)
*
* TODO: After unsharing the PID namespace and forking, SIG_DFL for SIGTERM and
* SIGQUIT unexpectedly doesn't cause the process to terminate, figure out why.
*
* #syscalls exit_group
*/
void exit_handler(int signal)
{