| Date | Mon, 2 May 2022 12:08:49 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH v2 10/12] ptrace: Only return signr from ptrace_stop if it was provided |
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On 2022-04-29 16:48:35 [-0500], Eric W. Biederman wrote: > In ptrace_stop a ptrace_unlink or SIGKILL can occur either after > siglock is dropped or after tasklist_lock is dropped. At either point > the result can be that ptrace will continue and not stop at schedule. > > This means that there are cases where the current logic fails to handle > the fact that ptrace_stop did not actually stop, and can potentially > cause ptrace_report_syscall to attempt to deliver a signal. > > Instead of attempting to detect in ptrace_stop when it fails to > stop update ptrace_resume and ptrace_detach to set a flag to indicate , > that the signal to continue with has be set. Use that been > new flag to decided how to set return signal. > > Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Sebastian
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