Date: Fri, 17 Mar 2017 13:37:37 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r315453 - head/sys/kern Message-ID: <201703171337.v2HDbbqn050402@repo.freebsd.org>
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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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