[merged mm-stable] selftests-memfd-fix-wmaybe-uninitialized-warning-in-memfd_test.patch removed from -mm tree

[merged mm-stable] selftests-memfd-fix-wmaybe-uninitialized-warning-in-memfd_test.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/memfd: fix -Wmaybe-uninitialized warning in memfd_test
has been removed from the -mm tree.  Its filename was
     selftests-memfd-fix-wmaybe-uninitialized-warning-in-memfd_test.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Konstantin Khorenko <khorenko@virtuozzo.com>
Subject: selftests/memfd: fix -Wmaybe-uninitialized warning in memfd_test
Date: Sun, 24 May 2026 22:35:56 +0300

Patch series "selftests/memfd: fix compilation warnings".

This patchset fixes warnings about unused but initialized variables, and
unused dummy buffer passed to pwrite() syscall in the tests.


This patch (of 2):

  memfd_test.c: In function 'mfd_fail_grow_write.part.0':
  memfd_test.c:685:13: warning: '<unknown>' may be used uninitialized
  [-Wmaybe-uninitialized]
    685 |         l = pwrite(fd, buf, mfd_def_size * 8, 0);
        |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

pwrite() is declared with attribute 'access (read_only, 2, 3)', so GCC
knows it reads from the buffer.  malloc() returns uninitialized memory,
hence the warning.  Use calloc() to zero-initialize the buffer.  The
actual contents don't matter here since the test verifies that pwrite()
fails on a sealed memfd.

Link: https://lore.kernel.org/20260524193732.48853-1-eva.kurchatova@virtuozzo.com
Link: https://lore.kernel.org/20260524193732.48853-2-eva.kurchatova@virtuozzo.com
Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Cc: Aristeu Rozanski <aris@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/memfd/memfd_test.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/memfd/memfd_test.c~selftests-memfd-fix-wmaybe-uninitialized-warning-in-memfd_test
+++ a/tools/testing/selftests/memfd/memfd_test.c
@@ -688,9 +688,9 @@ static void mfd_assert_grow_write(int fd
 	if (hugetlbfs_test)
 		return;
 
-	buf = malloc(mfd_def_size * 8);
+	buf = calloc(1, mfd_def_size * 8);
 	if (!buf) {
-		printf("malloc(%zu) failed: %m\n", mfd_def_size * 8);
+		printf("calloc(1, %zu) failed: %m\n", mfd_def_size * 8);
 		abort();
 	}
 
_

Patches currently in -mm which might be from khorenko@virtuozzo.com are