This is a note to let you know that I've just added the patch titled
bio-integrity: Fix bio_integrity_verify segment start bug
to the 3.13-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:
bio-integrity-fix-bio_integrity_verify-segment-start-bug.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5837c80e870bc3b12ac6a98cdc9ce7a9522a8fb6 Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Tue, 21 Jan 2014 20:32:05 -0800
Subject: bio-integrity: Fix bio_integrity_verify segment start bug
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
commit 5837c80e870bc3b12ac6a98cdc9ce7a9522a8fb6 upstream.
This patch addresses a bug in bio_integrity_verify() code that has
been causing DIF READ verify operations to be silently skipped.
The issue is that bio->bi_idx will have been incremented within
bio_advance() code in the normal blk_update_request() ->
req_bio_endio() completion path, and bio_integrity_verify() is
using bio_for_each_segment() which starts the bio segment walk
at the current bio->bi_idx.
So instead use bio_for_each_segment_all() to always start the bio
segment walk from zero, regardless of the current bio->bi_idx
value after bio_advance() has been called.
(Context change for v3.10.y -> v3.13.y code - nab)
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/bio-integrity.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -458,7 +458,7 @@ static int bio_integrity_verify(struct b
bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
bix.sector_size = bi->sector_size;
- bio_for_each_segment(bv, bio, i) {
+ bio_for_each_segment_all(bv, bio, i) {
void *kaddr = kmap_atomic(bv->bv_page);
bix.data_buf = kaddr + bv->bv_offset;
bix.data_size = bv->bv_len;
Patches currently in stable-queue which might be from nab@xxxxxxxxxxxxxxx are
queue-3.13/iscsi-iser-target-fix-isert_conn-state-hung-shutdown-issues.patch
queue-3.13/iscsi-target-fix-iscsit_get_tpg_from_np-tpg_state-bug.patch
queue-3.13/iser-target-fix-command-leak-for-tx_desc-comp_llnode_batch.patch
queue-3.13/bio-integrity-fix-bio_integrity_verify-segment-start-bug.patch
queue-3.13/iser-target-ignore-completions-for-frwrs-in-isert_cq_tx_work.patch
queue-3.13/iser-target-fix-post_send_buf_count-for-rdma-read-write.patch
queue-3.13/iscsi-iser-target-use-list_del_init-for-i_conn_node.patch
--
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