diff options
| author | Christian Brauner <brauner@kernel.org> | 2025-01-04 09:56:42 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-01-04 10:12:19 +0100 |
| commit | 6a4ef7a2ff4dfdb7b345b13bd74fc68fe351bb45 (patch) | |
| tree | 785e008a7ebbfceed344f84b34bfdef5d0810d96 /fs/proc/array.c | |
| parent | aaec5a95d59615523db03dd53c2052f0a87beea7 (diff) | |
| parent | 15858da53542360931a457f32bcdc4287d13731f (diff) | |
Merge patch series "fix reading ESP during coredump"
Nam Cao <namcao@linutronix.de> says:
In /proc/PID/stat, there is the kstkesp field which is the stack pointer of
a thread. While the thread is active, this field reads zero. But during a
coredump, it should have a valid value.
However, at the moment, kstkesp is zero even during coredump.
The first commit fixes this problem, and the second commit adds a selftest
to detect if this problem appears again in the future.
* patches from https://lore.kernel.org/r/cover.1735805772.git.namcao@linutronix.de:
selftests: coredump: Add stackdump test
fs/proc: do_task_stat: Fix ESP not readable during coredump
Link: https://lore.kernel.org/r/cover.1735805772.git.namcao@linutronix.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 55ed3510d2bb..d6a0369caa93 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -500,7 +500,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, * a program is not able to use ptrace(2) in that case. It is * safe because the task has stopped executing permanently. */ - if (permitted && (task->flags & (PF_EXITING|PF_DUMPCORE))) { + if (permitted && (task->flags & (PF_EXITING|PF_DUMPCORE|PF_POSTCOREDUMP))) { if (try_get_task_stack(task)) { eip = KSTK_EIP(task); esp = KSTK_ESP(task); |