Date: Wed, 11 Nov 2020 00:43:13 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r367582 - stable/12/sys/kern Message-ID: <202011110043.0AB0hDtt064080@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: kib Date: Wed Nov 11 00:43:13 2020 New Revision: 367582 URL: https://svnweb.freebsd.org/changeset/base/367582 Log: MFC r367120: Check for process group change in tty_wait_background(). PR: 250701 Modified: stable/12/sys/kern/tty.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/tty.c ============================================================================== --- stable/12/sys/kern/tty.c Tue Nov 10 23:25:16 2020 (r367581) +++ stable/12/sys/kern/tty.c Wed Nov 11 00:43:13 2020 (r367582) @@ -464,6 +464,19 @@ tty_wait_background(struct tty *tp, struct thread *td, sig = 0; } PGRP_LOCK(pg); + + /* + * pg may no longer be our process group. + * Re-check after locking process group. + */ + PROC_LOCK(p); + if (p->p_pgrp != pg) { + PROC_UNLOCK(p); + PGRP_UNLOCK(pg); + continue; + } + + PROC_UNLOCK(p); pgsignal(pg, ksi.ksi_signo, 1, &ksi); PGRP_UNLOCK(pg);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202011110043.0AB0hDtt064080>