This is a note to let you know that I've just added the patch titled
zram: allow request end to coincide with disksize
to the 3.4-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:
zram-allow-request-end-to-coincide-with-disksize.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 498a727b33ee121e4b57428257a05f657674af46 Mon Sep 17 00:00:00 2001
From: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Date: Sat, 22 Jun 2013 17:21:00 +0300
Subject: zram: allow request end to coincide with disksize
From: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 upstream.
Pass valid_io_request() checks if request end coincides with disksize
(end equals bound), only fail if we attempt to read beyond the bound.
mkfs.ext2 produces numerous errors:
[ 2164.632747] quiet_error: 1 callbacks suppressed
[ 2164.633260] Buffer I/O error on device zram0, logical block 153599
[ 2164.633265] lost page write due to I/O error on zram0
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Jianguo Wu <wujianguo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/zram/zram_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -547,7 +547,7 @@ static inline int valid_io_request(struc
end = start + (bio->bi_size >> SECTOR_SHIFT);
bound = zram->disksize >> SECTOR_SHIFT;
/* out of range range */
- if (unlikely(start >= bound || end >= bound || start > end))
+ if (unlikely(start >= bound || end > bound || start > end))
return 0;
/* I/O request is valid */
Patches currently in stable-queue which might be from sergey.senozhatsky@xxxxxxxxx are
queue-3.4/zram-allow-request-end-to-coincide-with-disksize.patch
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