From: Eric W. Biederman Date: Wed, 23 Jun 2021 21:51:49 +0000 (-0500) Subject: signal/seccomp: Dump core when there is only one live thread X-Git-Tag: libata-5.15-2021-09-05~40^2 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d21918e5a94a862ccb297b9f2be38574c865fda0;p=linux-block.git signal/seccomp: Dump core when there is only one live thread Replace get_nr_threads with atomic_read(¤t->signal->live) as that is a more accurate number that is decremented sooner. Acked-by: Kees Cook Link: https://lkml.kernel.org/r/87lf6z6qbd.fsf_-_@disp2133 Signed-off-by: "Eric W. Biederman" --- diff --git a/kernel/seccomp.c b/kernel/seccomp.c index abcbd3d2ba54..afa4db097068 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -1264,7 +1264,7 @@ static int __seccomp_filter(int this_syscall, const struct seccomp_data *sd, seccomp_log(this_syscall, SIGSYS, action, true); /* Dump core only if this is the last remaining thread. */ if (action != SECCOMP_RET_KILL_THREAD || - get_nr_threads(current) == 1) { + (atomic_read(¤t->signal->live) == 1)) { /* Show the original registers in the dump. */ syscall_rollback(current, current_pt_regs()); /* Trigger a coredump with SIGSYS */