* [PATCH] selftests: kvm: fix mismatched fclose() after popen()
@ 2021-10-21 17:53 Shuah Khan
2021-10-21 17:55 ` Shuah Khan
0 siblings, 1 reply; 2+ messages in thread
From: Shuah Khan @ 2021-10-21 17:53 UTC (permalink / raw)
To: pbonzini, shuah; +Cc: Shuah Khan, kvm, linux-kselftest, linux-kernel
get_warnings_count() foes fclose() using File * returned from popen().
Fix it to call pclose() as it should.
tools/testing/selftests/kvm/x86_64/mmio_warning_test
x86_64/mmio_warning_test.c: In function ‘get_warnings_count’:
x86_64/mmio_warning_test.c:87:9: warning: ‘fclose’ called on pointer returned from a mismatched allocation function [-Wmismatched-dealloc]
87 | fclose(f);
| ^~~~~~~~~
x86_64/mmio_warning_test.c:84:13: note: returned from ‘popen’
84 | f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
tools/testing/selftests/kvm/x86_64/mmio_warning_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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 8039e1eff938..9f55ccd169a1 100644
--- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
+++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
@@ -84,7 +84,7 @@ int get_warnings_count(void)
f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
if (fscanf(f, "%d", &warnings) < 1)
warnings = 0;
- fclose(f);
+ pclose(f);
return warnings;
}
--
2.32.0
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] selftests: kvm: fix mismatched fclose() after popen()
2021-10-21 17:53 [PATCH] selftests: kvm: fix mismatched fclose() after popen() Shuah Khan
@ 2021-10-21 17:55 ` Shuah Khan
0 siblings, 0 replies; 2+ messages in thread
From: Shuah Khan @ 2021-10-21 17:55 UTC (permalink / raw)
To: pbonzini, shuah; +Cc: kvm, linux-kselftest, linux-kernel, Shuah Khan
On 10/21/21 11:53 AM, Shuah Khan wrote:
> get_warnings_count() foes fclose() using File * returned from popen().
Oops should have been "does". Sending v2 with that change now.
> Fix it to call pclose() as it should.
>
> tools/testing/selftests/kvm/x86_64/mmio_warning_test
> x86_64/mmio_warning_test.c: In function ‘get_warnings_count’:
> x86_64/mmio_warning_test.c:87:9: warning: ‘fclose’ called on pointer returned from a mismatched allocation function [-Wmismatched-dealloc]
> 87 | fclose(f);
> | ^~~~~~~~~
> x86_64/mmio_warning_test.c:84:13: note: returned from ‘popen’
> 84 | f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
> ---
> tools/testing/selftests/kvm/x86_64/mmio_warning_test.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> 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 8039e1eff938..9f55ccd169a1 100644
> --- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
> @@ -84,7 +84,7 @@ int get_warnings_count(void)
> f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
> if (fscanf(f, "%d", &warnings) < 1)
> warnings = 0;
> - fclose(f);
> + pclose(f);
>
> return warnings;
> }
>
thanks,
-- Shuah
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