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From: zhanchengbin <zhanchengbin1@huawei.com>
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 <zhanchengbin1@huawei.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
---
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++;
}
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