From: Shuah Khan Date: Thu, 21 Oct 2021 21:33:33 +0000 (-0600) Subject: selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv() X-Git-Tag: v5.16-rc1~138^2~1 X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/dd40f44eabe1e122c6852fabb298aac05b083fce selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv() 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 --- diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c index 65c141ebfbbd..5b45e6986aea 100644 --- a/tools/testing/selftests/x86/test_vsyscall.c +++ b/tools/testing/selftests/x86/test_vsyscall.c @@ -497,7 +497,7 @@ 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");