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| author | Eric W. Biederman <ebiederm@xmission.com> | 2021-06-24 02:14:30 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2022-01-08 12:43:57 -0600 |
| commit | 49697335e0b441b0553598c1b48ee9ebb053d2f1 (patch) | |
| tree | 87f8bbaeb9f274055e4bf8bb84e8aef77038f39f /fs/coredump.c | |
| parent | 60700e38fb68e800607ca7a027060d5419fc5798 (diff) | |
| download | linux-49697335e0b441b0553598c1b48ee9ebb053d2f1.tar.gz linux-49697335e0b441b0553598c1b48ee9ebb053d2f1.tar.bz2 linux-49697335e0b441b0553598c1b48ee9ebb053d2f1.zip | |
signal: Remove the helper signal_group_exit
This helper is misleading. It tests for an ongoing exec as well as
the process having received a fatal signal.
Sometimes it is appropriate to treat an on-going exec differently than
a process that is shutting down due to a fatal signal. In particular
taking the fast path out of exit_signals instead of retargeting
signals is not appropriate during exec, and not changing the the exit
code in do_group_exit during exec.
Removing the helper makes it more obvious what is going on as both
cases must be coded for explicitly.
While removing the helper fix the two cases where I have observed
using signal_group_exit resulted in the wrong result.
In exit_signals only test for SIGNAL_GROUP_EXIT so that signals are
retargetted during an exec.
In do_group_exit use 0 as the exit code during an exec as de_thread
does not set group_exit_code. As best as I can determine
group_exit_code has been is set to 0 most of the time during
de_thread. During a thread group stop group_exit_code is set to the
stop signal and when the thread group receives SIGCONT group_exit_code
is reset to 0.
Link: https://lkml.kernel.org/r/20211213225350.27481-8-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/coredump.c')
| -rw-r--r-- | fs/coredump.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/coredump.c b/fs/coredump.c index c92ffc0bf2c2..7dece20b162b 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -372,11 +372,12 @@ static int zap_process(struct task_struct *start, int exit_code) static int zap_threads(struct task_struct *tsk, struct core_state *core_state, int exit_code) { + struct signal_struct *signal = tsk->signal; int nr = -EAGAIN; spin_lock_irq(&tsk->sighand->siglock); - if (!signal_group_exit(tsk->signal)) { - tsk->signal->core_state = core_state; + if (!(signal->flags & SIGNAL_GROUP_EXIT) && !signal->group_exec_task) { + signal->core_state = core_state; nr = zap_process(tsk, exit_code); clear_tsk_thread_flag(tsk, TIF_SIGPENDING); tsk->flags |= PF_DUMPCORE; |