This is a note to let you know that I've just added the patch titled
dm flakey: fix a bug with 32-bit highmem systems
to the 4.19-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:
dm-flakey-fix-a-bug-with-32-bit-highmem-systems.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Sun, 22 Jan 2023 14:03:31 -0500
Subject: dm flakey: fix a bug with 32-bit highmem systems
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
commit 8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50 upstream.
The function page_address does not work with 32-bit systems with high
memory. Use bvec_kmap_local/kunmap_local instead.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-flakey.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -305,8 +305,9 @@ static void corrupt_bio_data(struct bio
struct page *page = bio_iter_page(bio, iter);
if (unlikely(page == ZERO_PAGE(0)))
break;
- segment = (page_address(page) + bio_iter_offset(bio, iter));
+ segment = bvec_kmap_local(&bvec);
segment[corrupt_bio_byte] = fc->corrupt_bio_value;
+ kunmap_local(segment);
DMDEBUG("Corrupting data bio=%p by writing %u to byte %u "
"(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n",
bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,
Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are
queue-4.19/dm-flakey-don-t-corrupt-the-zero-page.patch
queue-4.19/dm-flakey-fix-logic-when-corrupting-a-bio.patch
queue-4.19/dm-flakey-fix-a-bug-with-32-bit-highmem-systems.patch
