This is a note to let you know that I've just added the patch titled
selftests:kvm: fix get_warnings_count() ignoring fscanf() return warn
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-kvm-fix-get_warnings_count-ignoring-fscanf.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 23768beb84b31a4d0bb6b069223d07e1268c9130
Author: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Date: Wed Sep 15 15:28:06 2021 -0600
selftests:kvm: fix get_warnings_count() ignoring fscanf() return warn
[ Upstream commit 39a71f712d8a13728febd8f3cb3f6db7e1fa7221 ]
Fix get_warnings_count() to check fscanf() return value to get rid
of the following warning:
x86_64/mmio_warning_test.c: In function ‘get_warnings_count’:
x86_64/mmio_warning_test.c:85:2: warning: ignoring return value of ‘fscanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
85 | fscanf(f, "%d", &warnings);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
index e6480fd5c4bd..8039e1eff938 100644
--- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
+++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
@@ -82,7 +82,8 @@ int get_warnings_count(void)
FILE *f;
f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
- fscanf(f, "%d", &warnings);
+ if (fscanf(f, "%d", &warnings) < 1)
+ warnings = 0;
fclose(f);
return warnings;
