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qemu-user does has its own implementation of coredumping. That implementation does not respect the call to prctl(PR_SET_DUMPABLE, 0) in run_protection(). This leads to a coredump for every test run under qemu-user. Use also setrlimit() to inhibit coredump creation which is respected by qemu-user. Link: https://lore.kernel.org/qemu-devel/20231115-qemu-user-dumpable-v1-2-edbe7f0fbb02@t-8ch.de/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/lkml/20231123-nolibc-rlimit-v1-3-a428b131de2a@weissschuh.net/ Acked-by: Willy Tarreau <w@1wt.eu>