linux-user/elfload: check PR_GET_DUMPABLE before creating coredump
A process can opt-out of coredump creation by calling prctl(PR_SET_DUMPABLE, 0). linux-user passes this call from the guest through to the operating system. From there it can be read back again to avoid creating coredumps from qemu-user itself if the guest chose so. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> Message-Id: <20240120-qemu-user-dumpable-v3-2-6aa410c933f1@t-8ch.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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@ -2,6 +2,7 @@
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#include "qemu/osdep.h"
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#include "qemu/osdep.h"
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#include <sys/param.h>
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#include <sys/param.h>
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#include <sys/prctl.h>
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#include <sys/resource.h>
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#include <sys/resource.h>
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#include <sys/shm.h>
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#include <sys/shm.h>
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@ -4667,6 +4668,11 @@ static int elf_core_dump(int signr, const CPUArchState *env)
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init_note_info(&info);
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init_note_info(&info);
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errno = 0;
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errno = 0;
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if (prctl(PR_GET_DUMPABLE) == 0) {
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return 0;
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}
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if (getrlimit(RLIMIT_CORE, &dumpsize) == 0 && dumpsize.rlim_cur == 0) {
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if (getrlimit(RLIMIT_CORE, &dumpsize) == 0 && dumpsize.rlim_cur == 0) {
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return 0;
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return 0;
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}
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}
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