From: Shuah Khan skhan@linuxfoundation.org
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 --- tools/testing/selftests/x86/test_vsyscall.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/x86/test_vsyscall.c +++ b/tools/testing/selftests/x86/test_vsyscall.c @@ -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");