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selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv()

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commit dd40f44eabe1e122c6852fabb298aac05b083fce upstream.

Fix the following [-Wstringop-overread] by passing in the variable
instead of the value.

test_vsyscall.c: In function ‘test_process_vm_readv’:
test_vsyscall.c:500:22: warning: ‘__builtin_memcmp_eq’ specified bound 4096 exceeds source size 0 [-Wstringop-overread]
  500 |                 if (!memcmp(buf, (const void *)0xffffffffff600000, 4096)) {
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shuah Khan 2021-10-21 15:33:33 -06:00 committed by Greg Kroah-Hartman
parent 6904679c84
commit cbbed1338d
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/x86/test_vsyscall.c
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@ -480,7 +480,7 @@ static int test_process_vm_readv(void)
}
if (vsyscall_map_r) {
if (!memcmp(buf, (const void *)0xffffffffff600000, 4096)) {
if (!memcmp(buf, remote.iov_base, sizeof(buf))) {
printf("[OK]\tIt worked and read correct data\n");
} else {
printf("[FAIL]\tIt worked but returned incorrect data\n");