FAILED: patch "[PATCH] scsi: sd: fix missing put_disk() when device_add(&disk_dev)" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] scsi: sd: fix missing put_disk() when device_add(&disk_dev)" 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 1e111c4b3a726df1254670a5cc4868cedb946d37
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026050456-overview-shaking-6135@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From 1e111c4b3a726df1254670a5cc4868cedb946d37 Mon Sep 17 00:00:00 2001
From: Yang Xiuwei <yangxiuwei@kylinos.cn>
Date: Mon, 30 Mar 2026 09:49:52 +0800
Subject: [PATCH] scsi: sd: fix missing put_disk() when device_add(&disk_dev)
 fails

If device_add(&sdkp->disk_dev) fails, put_device() runs
scsi_disk_release(), which frees the scsi_disk but leaves the gendisk
referenced. The device_add_disk() error path in sd_probe() calls
put_disk(gd); call put_disk(gd) here to mirror that cleanup.

Fixes: 265dfe8ebbab ("scsi: sd: Free scsi_disk device via put_device()")
Cc: stable@vger.kernel.org
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Yang Xiuwei <yangxiuwei@kylinos.cn>
Link: https://patch.msgid.link/20260330014952.152776-1-yangxiuwei@kylinos.cn
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 205877b1f8aa..adc3fa55ca2c 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -4061,6 +4061,7 @@ static int sd_probe(struct scsi_device *sdp)
 	error = device_add(&sdkp->disk_dev);
 	if (error) {
 		put_device(&sdkp->disk_dev);
+		put_disk(gd);
 		goto out;
 	}