From: zhanchengbin Date: Mon, 10 Oct 2022 17:23:24 +0800 Subject: [PATCH 24/24] fsck: Processes may kill other processes. A error in disk-utils/fsck.c, if run the fsck -N command, processes don't execute, just show what would be done. However, the pid whose value is -1 is added to the instance_list list in the execute function,if the kill_all function is called later, kill(-1, signum) is executed, Signals are sent to all processes except the number one process and itself. Other processes will be killed if they use the default signal processing function. Signed-off-by: zhanchengbin Reviewed-by: Lukas Czerner --- disk-utils/fsck.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/disk-utils/fsck.c b/disk-utils/fsck.c index 505952c..800d3ce 100644 --- a/disk-utils/fsck.c +++ b/disk-utils/fsck.c @@ -730,6 +730,8 @@ static int kill_all(int signum) for (inst = instance_list; inst; inst = inst->next) { if (inst->flags & FLAG_DONE) continue; + if (inst->pid <= 0) + continue; kill(inst->pid, signum); n++; }