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sysdeps: tst-bz21269: handle ENOSYS & skip appropriately

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SYS_modify_ldt requires CONFIG_MODIFY_LDT_SYSCALL to be set in the kernel, which
some distributions may disable for hardening. Check if that's the case (unset)
and mark the test as UNSUPPORTED if so.

Reviewed-by: DJ Delorie <dj@redhat.com>
Signed-off-by: Sam James <sam@gentoo.org>
This commit is contained in:
Sam James 2023-08-05 00:04:33 +01:00
parent e0b712dd91
commit 652b9fdb77
1 changed files with 10 additions and 1 deletions
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11
sysdeps/unix/sysv/linux/i386/tst-bz21269.c
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@ -52,7 +52,16 @@ xset_thread_area (struct user_desc *u_info)
static void
xmodify_ldt (int func, const void *ptr, unsigned long bytecount)
{
TEST_VERIFY_EXIT (syscall (SYS_modify_ldt, func, ptr, bytecount) == 0);
long ret = syscall (SYS_modify_ldt, func, ptr, bytecount);
if (ret == -1)
{
if (errno == ENOSYS)
FAIL_UNSUPPORTED ("modify_ldt not supported");
FAIL_EXIT1 ("modify_ldt failed (errno=%d)", errno);
}
return 0;
}
static int