This is a note to let you know that I've just added the patch titled
block: don't add or resize partition on the disk with GENHD_FL_NO_PART
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
block-don-t-add-or-resize-partition-on-the-disk-with-genhd_fl_no_part.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1a721de8489fa559ff4471f73c58bb74ac5580d3 Mon Sep 17 00:00:00 2001
From: Li Lingfeng <lilingfeng3@xxxxxxxxxx>
Date: Thu, 31 Aug 2023 15:59:00 +0800
Subject: block: don't add or resize partition on the disk with GENHD_FL_NO_PART
From: Li Lingfeng <lilingfeng3@xxxxxxxxxx>
commit 1a721de8489fa559ff4471f73c58bb74ac5580d3 upstream.
Commit a33df75c6328 ("block: use an xarray for disk->part_tbl") remove
disk_expand_part_tbl() in add_partition(), which means all kinds of
devices will support extended dynamic `dev_t`.
However, some devices with GENHD_FL_NO_PART are not expected to add or
resize partition.
Fix this by adding check of GENHD_FL_NO_PART before add or resize
partition.
Fixes: a33df75c6328 ("block: use an xarray for disk->part_tbl")
Signed-off-by: Li Lingfeng <lilingfeng3@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Link: https://lore.kernel.org/r/20230831075900.1725842-1-lilingfeng@xxxxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/ioctl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -20,6 +20,8 @@ static int blkpg_do_ioctl(struct block_d
struct blkpg_partition p;
long long start, length;
+ if (disk->flags & GENHD_FL_NO_PART)
+ return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
Patches currently in stable-queue which might be from lilingfeng3@xxxxxxxxxx are
queue-5.15/block-don-t-add-or-resize-partition-on-the-disk-with-genhd_fl_no_part.patch
