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62badefdba
A shared signal that is still queued when a thread crashes gets retargeted to the dumper when a zapped sibling restores its signal mask on the way out of sigtimedwait(). That sets TIF_SIGPENDING on the dumper and cuts the core short at the next full pipe or socket buffer. Cover that: - one sibling sleeps in sigtimedwait() for SIGUSR1 - a vfork() child queues SIGUSR1 for the main thread while it sleeps killably and then the SIGSEGV that is dequeued first - the coredump server holds its read back so the dumper blocks on the full socket buffer Check that the core covers every segment with and without the queued signal. Link: https://patch.msgid.link/20260921-work-coredump-fixes-v3-6-8e4adb1619e6@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
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