FAILED: patch "[PATCH] scsi: xen: scsiback: Fix potential memory leak in" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] scsi: xen: scsiback: Fix potential memory leak in" failed to apply to 5.15-stable tree

[gregkh]

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 901a5f309daba412e2a30364d7ec1492fa11c32c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026012626-cognitive-spoiled-5d7d@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 901a5f309daba412e2a30364d7ec1492fa11c32c Mon Sep 17 00:00:00 2001
From: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Date: Tue, 23 Dec 2025 12:00:11 +0530
Subject: [PATCH] scsi: xen: scsiback: Fix potential memory leak in
 scsiback_remove()

Memory allocated for struct vscsiblk_info in scsiback_probe() is not
freed in scsiback_remove() leading to potential memory leaks on remove,
as well as in the scsiback_probe() error paths. Fix that by freeing it
in scsiback_remove().

Cc: stable@vger.kernel.org
Fixes: d9d660f6e562 ("xen-scsiback: Add Xen PV SCSI backend driver")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://patch.msgid.link/20251223063012.119035-1-nihaal@cse.iitm.ac.in
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 0c51edfd13dc..7d5117e5efe0 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -1262,6 +1262,7 @@ static void scsiback_remove(struct xenbus_device *dev)
 	gnttab_page_cache_shrink(&info->free_pages, 0);
 
 	dev_set_drvdata(&dev->dev, NULL);
+	kfree(info);
 }
 
 static int scsiback_probe(struct xenbus_device *dev,

[PATCH 5.15.y] scsi: xen: scsiback: Fix potential memory leak in scsiback_remove()

[Sasha Levin]

From: Abdun Nihaal <nihaal@cse.iitm.ac.in>

[ Upstream commit 901a5f309daba412e2a30364d7ec1492fa11c32c ]

Memory allocated for struct vscsiblk_info in scsiback_probe() is not
freed in scsiback_remove() leading to potential memory leaks on remove,
as well as in the scsiback_probe() error paths. Fix that by freeing it
in scsiback_remove().

Cc: stable@vger.kernel.org
Fixes: d9d660f6e562 ("xen-scsiback: Add Xen PV SCSI backend driver")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://patch.msgid.link/20251223063012.119035-1-nihaal@cse.iitm.ac.in
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
[ adapted void scsiback_remove() to int return type with return 0 statement ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/xen/xen-scsiback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 0c5e565aa8cff..244029f4a96f1 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -1197,6 +1197,7 @@ static int scsiback_remove(struct xenbus_device *dev)
 	gnttab_page_cache_shrink(&info->free_pages, 0);
 
 	dev_set_drvdata(&dev->dev, NULL);
+	kfree(info);
 
 	return 0;
 }
-- 
2.51.0