From e4f530da0db59ff51549c11ed6ef799b4ade1c87 Mon Sep 17 00:00:00 2001 From: Peter Zelezny Date: Fri, 13 Oct 2017 22:49:49 +0200 Subject: nptl: Preserve error in setxid thread broadcast in coredumps [BZ #22153] --- nptl/allocatestack.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'nptl/allocatestack.c') diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 196371a88f..ad9add8d2a 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -1105,8 +1105,13 @@ __nptl_setxid_error (struct xid_command *cmdp, int error) if (olderror == error) break; if (olderror != -1) - /* Mismatch between current and previous results. */ - abort (); + { + /* Mismatch between current and previous results. Save the + error value to memory so that is not clobbered by the + abort function and preserved in coredumps. */ + volatile int xid_err __attribute__((unused)) = error; + abort (); + } } while (atomic_compare_and_exchange_bool_acq (&cmdp->error, error, -1)); } -- cgit 1.4.1