Date: Thu, 4 Feb 2016 10:49:34 +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: r295249 - head/sys/kern Message-ID: <201602041049.u14AnY3x036359@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: kib Date: Thu Feb 4 10:49:34 2016 New Revision: 295249 URL: https://svnweb.freebsd.org/changeset/base/295249 Log: Guard against runnable td2 exiting and than being reused for unrelated process when the parent sleeps waiting for the debugger attach on fork. Diagnosed and reviewed by: mjg Sponsored by: The FreeBSD Foundation Modified: head/sys/kern/kern_fork.c Modified: head/sys/kern/kern_fork.c ============================================================================== --- head/sys/kern/kern_fork.c Thu Feb 4 09:39:08 2016 (r295248) +++ head/sys/kern/kern_fork.c Thu Feb 4 10:49:34 2016 (r295249) @@ -777,7 +777,7 @@ do_fork(struct thread *td, struct fork_r /* * Wait until debugger is attached to child. */ - while ((td2->td_dbgflags & TDB_STOPATFORK) != 0) + while (td2->td_proc == p2 && (td2->td_dbgflags & TDB_STOPATFORK) != 0) cv_wait(&p2->p_dbgwait, &p2->p_mtx); _PRELE(p2); racct_proc_fork_done(p2);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201602041049.u14AnY3x036359>