Fix -Wunused-result warning generated when compiled with gcc 13.3.0,
by checking fread's return value and handling errors, preventing
potential failures when reading from stdin.
Fixes compiler warning:
warning: ignoring return value of 'fread' declared with attribute
'warn_unused_result' [-Wunused-result]
Fixes: 806a15b2545e ("kselftests/arm64: add PAuth test for whether exec()
changes keys")
Signed-off-by: Bala-Vignesh-Reddy <[email protected]>
---
tools/testing/selftests/arm64/pauth/exec_target.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/arm64/pauth/exec_target.c
b/tools/testing/selftests/arm64/pauth/exec_target.c
index 4435600ca400..c22db59194eb 100644
--- a/tools/testing/selftests/arm64/pauth/exec_target.c
+++ b/tools/testing/selftests/arm64/pauth/exec_target.c
@@ -13,7 +13,12 @@ int main(void)
unsigned long hwcaps;
size_t val;
- fread(&val, sizeof(size_t), 1, stdin);
+ size_t size = fread(&val, sizeof(size_t), 1, stdin);
+
+ if (size != 1) {
+ fprintf(stderr, "Could not read input from stdin\n");
+ return -1;
+ }
/* don't try to execute illegal (unimplemented) instructions) caller
* should have checked this and keep worker simple
--
2.43.0
