Message ID | 20240120-qemu-user-dumpable-v3-2-6aa410c933f1@t-8ch.de |
---|---|
State | New |
Headers | show |
Series | linux-user: two fixes to coredump generation | expand |
On 20/1/24 22:45, Thomas Weißschuh wrote: > 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: Richard Henderson <richard.henderson@linaro.org> > Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> > --- > linux-user/elfload.c | 6 ++++++ > 1 file changed, 6 insertions(+) Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index c5968719380a..daf7ef843564 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -2,6 +2,7 @@ #include "qemu/osdep.h" #include <sys/param.h> +#include <sys/prctl.h> #include <sys/resource.h> #include <sys/shm.h> @@ -4667,6 +4668,11 @@ static int elf_core_dump(int signr, const CPUArchState *env) init_note_info(&info); errno = 0; + + if (prctl(PR_GET_DUMPABLE) == 0) { + return 0; + } + if (getrlimit(RLIMIT_CORE, &dumpsize) == 0 && dumpsize.rlim_cur == 0) { return 0; }