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selftests/nolibc: disable coredump via setrlimit

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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>
This commit is contained in:
Thomas Weißschuh 2023-11-22 23:49:52 +01:00
parent a0bb5f88fc
commit d543d9ddf5
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/nolibc/nolibc-test.c
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@ -1166,6 +1166,7 @@ static int run_protection(int min __attribute__((unused)),
{
pid_t pid;
int llen = 0, status;
struct rlimit rlimit = { 0, 0 };
llen += printf("0 -fstackprotector ");
@ -1197,6 +1198,7 @@ static int run_protection(int min __attribute__((unused)),
close(STDERR_FILENO);
prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
setrlimit(RLIMIT_CORE, &rlimit);
smash_stack();
return 1;