Author: kib
Date: Fri Mar 17 13:37:37 2017
New Revision: 315453
URL: https://svnweb.freebsd.org/changeset/base/315453
Log:
When clearing altsigstack settings on exec, do it to the right thread.
Diagnosed by: smh
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/kern/kern_sig.c
Modified: head/sys/kern/kern_sig.c
==============================================================================
--- head/sys/kern/kern_sig.c Fri Mar 17 13:31:24 2017 (r315452)
+++ head/sys/kern/kern_sig.c Fri Mar 17 13:37:37 2017 (r315453)
@@ -976,7 +976,6 @@ execsigs(struct proc *p)
* and are now ignored by default).
*/
PROC_LOCK_ASSERT(p, MA_OWNED);
- td = FIRST_THREAD_IN_PROC(p);
ps = p->p_sigacts;
mtx_lock(&ps->ps_mtx);
while (SIGNOTEMPTY(ps->ps_sigcatch)) {
@@ -1007,6 +1006,8 @@ execsigs(struct proc *p)
* Reset stack state to the user stack.
* Clear set of signals caught on the signal stack.
*/
+ td = curthread;
+ MPASS(td->td_proc == p);
td->td_sigstk.ss_flags = SS_DISABLE;
td->td_sigstk.ss_size = 0;
td->td_sigstk.ss_sp = 0;
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