The branch stable/12 has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=16787d049ece7fdf457e7571050e837fc24a697f
commit 16787d049ece7fdf457e7571050e837fc24a697f
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2020-12-31 01:45:12 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-01-17 04:46:19 +0000
issignal(): when handling STOP-like signals, drop sigacts mutex earlier.
(cherry picked from commit e0d83cd3e49f0b9e16bc82ced7bd3b0ef9aa6a71)
---
sys/kern/kern_sig.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index b84793285d8a..9fbb6d86457a 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -2950,17 +2950,20 @@ issignal(struct thread *td)
* should ignore tty stops.
*/
if (prop & SIGPROP_STOP) {
+ mtx_unlock(&ps->ps_mtx);
if ((p->p_flag & (P_TRACED | P_WEXIT |
P_SINGLE_EXIT)) != 0 ||
(p->p_pgrp->pg_jobc == 0 &&
- (prop & SIGPROP_TTYSTOP) != 0))
+ (prop & SIGPROP_TTYSTOP) != 0)) {
+ mtx_lock(&ps->ps_mtx);
break; /* == ignore */
+ }
if (TD_SBDRY_INTR(td)) {
KASSERT((td->td_flags & TDF_SBDRY) != 0,
("lost TDF_SBDRY"));
+ mtx_lock(&ps->ps_mtx);
return (-1);
}
- mtx_unlock(&ps->ps_mtx);
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK,
&p->p_mtx.lock_object, "Catching SIGSTOP");
sigqueue_delete(&td->td_sigqueue, sig);
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