[PATCH 5.10 149/545] selftests/seccomp: Fix compile warning when CC=clang
From: Greg Kroah-Hartman
Date: Fri Aug 19 2022 - 12:06:47 EST
From: YiFei Zhu <zhuyifei@xxxxxxxxxx>
[ Upstream commit 3ce4b78f73e8e00fb86bad67ee7f6fe12019707e ]
clang has -Wconstant-conversion by default, and the constant 0xAAAAAAAAA
(9 As) being converted to an int, which is generally 32 bits, results
in the compile warning:
clang -Wl,-no-as-needed -Wall -isystem ../../../../usr/include/ -lpthread seccomp_bpf.c -lcap -o seccomp_bpf
seccomp_bpf.c:812:67: warning: implicit conversion from 'long' to 'int' changes value from 45812984490 to -1431655766 [-Wconstant-conversion]
int kill = kill_how == KILL_PROCESS ? SECCOMP_RET_KILL_PROCESS : 0xAAAAAAAAA;
~~~~ ^~~~~~~~~~~
1 warning generated.
-1431655766 is the expected truncation, 0xAAAAAAAA (8 As), so use
this directly in the code to avoid the warning.
Fixes: 3932fcecd962 ("selftests/seccomp: Add test for unknown SECCOMP_RET kill behavior")
Signed-off-by: YiFei Zhu <zhuyifei@xxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220526223407.1686936-1-zhuyifei@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index e36745995f22..413a7b9f3c4d 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -798,7 +798,7 @@ void kill_thread_or_group(struct __test_metadata *_metadata,
.len = (unsigned short)ARRAY_SIZE(filter_thread),
.filter = filter_thread,
};
- int kill = kill_how == KILL_PROCESS ? SECCOMP_RET_KILL_PROCESS : 0xAAAAAAAAA;
+ int kill = kill_how == KILL_PROCESS ? SECCOMP_RET_KILL_PROCESS : 0xAAAAAAAA;
struct sock_filter filter_process[] = {
BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
offsetof(struct seccomp_data, nr)),
--
2.35.1