[PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[Thomas Huth]

When running the migration test compiled with Clang from Fedora 37
and sanitizers enabled, there is an error complaining about unlink():

 ../tests/qtest/migration-test.c:1072:12: runtime error: null pointer
  passed as argument 1, which is declared to never be null
 /usr/include/unistd.h:858:48: note: nonnull attribute specified here
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
  ../tests/qtest/migration-test.c:1072:12 in
 (test program exited with status code 1)
 TAP parsing error: Too few tests run (expected 33, got 20)

The data->clientcert and data->clientkey pointers can indeed be unset
in some tests, so we have to check them before calling unlink() with
those.

While we're at it, I also noticed that the code is only freeing
some but not all of the allocated strings in this function, and
indeed, valgrind is also complaining about memory leaks here.
So let's call g_free() on all allocated strings to avoid leaking
memory here.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/migration-test.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 442998d9eb..dbde726adf 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -1066,15 +1066,27 @@ test_migrate_tls_x509_finish(QTestState *from,
     TestMigrateTLSX509Data *data = opaque;
 
     test_tls_cleanup(data->keyfile);
+    g_free(data->keyfile);
+
     unlink(data->cacert);
+    g_free(data->cacert);
     unlink(data->servercert);
+    g_free(data->servercert);
     unlink(data->serverkey);
-    unlink(data->clientcert);
-    unlink(data->clientkey);
-    rmdir(data->workdir);
+    g_free(data->serverkey);
 
+    if (data->clientcert) {
+        unlink(data->clientcert);
+        g_free(data->clientcert);
+    }
+    if (data->clientkey) {
+        unlink(data->clientkey);
+        g_free(data->clientkey);
+    }
+
+    rmdir(data->workdir);
     g_free(data->workdir);
-    g_free(data->keyfile);
+
     g_free(data);
 }
 #endif /* CONFIG_TASN1 */
-- 
2.31.1

Re: [PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[Daniel P. Berrangé]

On Fri, Nov 25, 2022 at 09:30:54AM +0100, Thomas Huth wrote:
> When running the migration test compiled with Clang from Fedora 37
> and sanitizers enabled, there is an error complaining about unlink():
> 
>  ../tests/qtest/migration-test.c:1072:12: runtime error: null pointer
>   passed as argument 1, which is declared to never be null
>  /usr/include/unistd.h:858:48: note: nonnull attribute specified here
>  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
>   ../tests/qtest/migration-test.c:1072:12 in
>  (test program exited with status code 1)
>  TAP parsing error: Too few tests run (expected 33, got 20)
> 
> The data->clientcert and data->clientkey pointers can indeed be unset
> in some tests, so we have to check them before calling unlink() with
> those.
> 
> While we're at it, I also noticed that the code is only freeing
> some but not all of the allocated strings in this function, and
> indeed, valgrind is also complaining about memory leaks here.
> So let's call g_free() on all allocated strings to avoid leaking
> memory here.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  tests/qtest/migration-test.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
-- 
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Re: [PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[Juan Quintela]

Thomas Huth <thuth@redhat.com> wrote:
> When running the migration test compiled with Clang from Fedora 37
> and sanitizers enabled, there is an error complaining about unlink():
>
>  ../tests/qtest/migration-test.c:1072:12: runtime error: null pointer
>   passed as argument 1, which is declared to never be null
>  /usr/include/unistd.h:858:48: note: nonnull attribute specified here
>  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
>   ../tests/qtest/migration-test.c:1072:12 in
>  (test program exited with status code 1)
>  TAP parsing error: Too few tests run (expected 33, got 20)
>
> The data->clientcert and data->clientkey pointers can indeed be unset
> in some tests, so we have to check them before calling unlink() with
> those.
>
> While we're at it, I also noticed that the code is only freeing
> some but not all of the allocated strings in this function, and
> indeed, valgrind is also complaining about memory leaks here.
> So let's call g_free() on all allocated strings to avoid leaking
> memory here.
>
> Signed-off-by: Thomas Huth <thuth@redhat.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>

Re: [PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[Bin Meng]

On Fri, Nov 25, 2022 at 4:33 PM Thomas Huth <thuth@redhat.com> wrote:
>
> When running the migration test compiled with Clang from Fedora 37
> and sanitizers enabled, there is an error complaining about unlink():
>
>  ../tests/qtest/migration-test.c:1072:12: runtime error: null pointer
>   passed as argument 1, which is declared to never be null
>  /usr/include/unistd.h:858:48: note: nonnull attribute specified here
>  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
>   ../tests/qtest/migration-test.c:1072:12 in
>  (test program exited with status code 1)
>  TAP parsing error: Too few tests run (expected 33, got 20)
>
> The data->clientcert and data->clientkey pointers can indeed be unset
> in some tests, so we have to check them before calling unlink() with
> those.
>
> While we're at it, I also noticed that the code is only freeing
> some but not all of the allocated strings in this function, and
> indeed, valgrind is also complaining about memory leaks here.
> So let's call g_free() on all allocated strings to avoid leaking
> memory here.
>
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  tests/qtest/migration-test.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
>

Tested-by: Bin Meng <bmeng@tinylab.org>

Re: [PATCH] tests/qtest/migration-test: Fix unlink error and memory leaks

[Juan Quintela]

Daniel P. Berrangé <berrange@redhat.com> wrote:
> On Fri, Nov 25, 2022 at 09:30:54AM +0100, Thomas Huth wrote:
>> When running the migration test compiled with Clang from Fedora 37
>> and sanitizers enabled, there is an error complaining about unlink():
>> 
>>  ../tests/qtest/migration-test.c:1072:12: runtime error: null pointer
>>   passed as argument 1, which is declared to never be null
>>  /usr/include/unistd.h:858:48: note: nonnull attribute specified here
>>  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
>>   ../tests/qtest/migration-test.c:1072:12 in
>>  (test program exited with status code 1)
>>  TAP parsing error: Too few tests run (expected 33, got 20)
>> 
>> The data->clientcert and data->clientkey pointers can indeed be unset
>> in some tests, so we have to check them before calling unlink() with
>> those.
>> 
>> While we're at it, I also noticed that the code is only freeing
>> some but not all of the allocated strings in this function, and
>> indeed, valgrind is also complaining about memory leaks here.
>> So let's call g_free() on all allocated strings to avoid leaking
>> memory here.
>> 
>> Signed-off-by: Thomas Huth <thuth@redhat.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>