[merged mm-hotfixes-stable] procfs-fix-a-locking-bug-in-a-vmcore_add_device_dump-error-path.patch removed from -mm tree

[merged mm-hotfixes-stable] procfs-fix-a-locking-bug-in-a-vmcore_add_device_dump-error-path.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: procfs: fix a locking bug in a vmcore_add_device_dump() error path
has been removed from the -mm tree.  Its filename was
     procfs-fix-a-locking-bug-in-a-vmcore_add_device_dump-error-path.patch

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

------------------------------------------------------
From: Bart Van Assche <bvanassche@acm.org>
Subject: procfs: fix a locking bug in a vmcore_add_device_dump() error path
Date: Wed, 29 Jan 2025 14:20:03 -0800

Unlock vmcore_mutex when returning -EBUSY.

Link: https://lkml.kernel.org/r/20250129222003.1495713-1-bvanassche@acm.org
Fixes: 0f3b1c40c652 ("fs/proc/vmcore: disallow vmcore modifications while the vmcore is open")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Baoquan he <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/vmcore.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/proc/vmcore.c~procfs-fix-a-locking-bug-in-a-vmcore_add_device_dump-error-path
+++ a/fs/proc/vmcore.c
@@ -1524,7 +1524,7 @@ int vmcore_add_device_dump(struct vmcore
 		pr_warn_once("Unexpected adding of device dump\n");
 	if (vmcore_open) {
 		ret = -EBUSY;
-		goto out_err;
+		goto unlock;
 	}
 
 	list_add_tail(&dump->list, &vmcoredd_list);
@@ -1532,6 +1532,9 @@ int vmcore_add_device_dump(struct vmcore
 	mutex_unlock(&vmcore_mutex);
 	return 0;
 
+unlock:
+	mutex_unlock(&vmcore_mutex);
+
 out_err:
 	vfree(buf);
 	vfree(dump);
_

Patches currently in -mm which might be from bvanassche@acm.org are

mm-vmstat-revert-fix-a-w=1-clang-compiler-warning.patch