[LTP] [PATCH] syscalls/getrandom05: use tst_syscall

[Jan Stancek]

With glibc-2.40 and recent kernel (6.12) the test uses
vdso implementation which runs into SIGSEGV for EFAULT test:

  #0  __arch_chacha20_blocks_nostack () at arch/x86/entry/vdso/vgetrandom-chacha.S:146
  146             movups          state0,0x00(output)

  (gdb) bt
  #0  __arch_chacha20_blocks_nostack () at arch/x86/entry/vdso/vgetrandom-chacha.S:146
  #1  0x00007fcd3ce6417a in __cvdso_getrandom_data (rng_info=0x7fcd3ce5f280, buffer=0xffffffffffffffff, len=64, flags=1, opaque_state=0x7fcd3ce5df00,
      opaque_len=<optimized out>) at arch/x86/entry/vdso/../../../../lib/vdso/getrandom.c:237
  #2  __cvdso_getrandom (buffer=<optimized out>, len=64, flags=1, opaque_state=0x7fcd3ce5df00, opaque_len=<optimized out>)
      at arch/x86/entry/vdso/../../../../lib/vdso/getrandom.c:259
  #3  __vdso_getrandom (buffer=0xffffffffffffffff, len=64, flags=1, opaque_state=0x7fcd3ce5df00, opaque_len=<optimized out>)
      at arch/x86/entry/vdso/vgetrandom.c:11
  #4  0x00007fcd3cc7faf3 in getrandom_vdso (buffer=0xffffffffffffffff, length=64, flags=0, cancel=<optimized out>)
      at ../sysdeps/unix/sysv/linux/getrandom.c:204
  #5  0x0000000000401ff7 in verify_getrandom (i=0) at getrandom05.c:40

Change the test to use syscall implementation of getrandom().

Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
 testcases/kernel/syscalls/getrandom/getrandom05.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/getrandom/getrandom05.c b/testcases/kernel/syscalls/getrandom/getrandom05.c
index 92098deb723d..8f7ce45785c5 100644
--- a/testcases/kernel/syscalls/getrandom/getrandom05.c
+++ b/testcases/kernel/syscalls/getrandom/getrandom05.c
@@ -16,6 +16,7 @@
 
 #include "tst_test.h"
 #include "lapi/getrandom.h"
+#include "lapi/syscalls.h"
 
 static char buff_efault[64];
 static char buff_einval[64];
@@ -36,7 +37,7 @@ static void verify_getrandom(unsigned int i)
 {
 	struct test_case_t *tc = &tcases[i];
 
-	TST_EXP_FAIL2(getrandom(tc->buff, tc->size, tc->flag),
+	TST_EXP_FAIL2(tst_syscall(__NR_getrandom, tc->buff, tc->size, tc->flag),
 		tc->expected_errno, "%s", tc->desc);
 }
 
-- 
2.43.0