This is a note to let you know that I've just added the patch titled
block: fix segment split
to the 4.3-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-fix-segment-split.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 578270bfbd2803dc7b0b03fbc2ac119efbc73195 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@xxxxxxxxxxxxx>
Date: Tue, 24 Nov 2015 10:35:29 +0800
Subject: block: fix segment split
From: Ming Lei <ming.lei@xxxxxxxxxxxxx>
commit 578270bfbd2803dc7b0b03fbc2ac119efbc73195 upstream.
Inside blk_bio_segment_split(), previous bvec pointer(bvprvp)
always points to the iterator local variable, which is obviously
wrong, so fix it by pointing to the local variable of 'bvprv'.
Fixes: 5014c311baa2b(block: fix bogus compiler warnings in blk-merge.c)
Reported-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Reported-by: Mark Salter <msalter@xxxxxxxxxx>
Tested-by: Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx>
Tested-by: Mark Salter <msalter@xxxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/blk-merge.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -91,7 +91,7 @@ static struct bio *blk_bio_segment_split
seg_size += bv.bv_len;
bvprv = bv;
- bvprvp = &bv;
+ bvprvp = &bvprv;
sectors += bv.bv_len >> 9;
continue;
}
@@ -101,7 +101,7 @@ new_segment:
nsegs++;
bvprv = bv;
- bvprvp = &bv;
+ bvprvp = &bvprv;
seg_size = bv.bv_len;
sectors += bv.bv_len >> 9;
}
Patches currently in stable-queue which might be from ming.lei@xxxxxxxxxxxxx are
queue-4.3/block-fix-segment-split.patch
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