mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-19 09:04:57 +00:00
Code Issues Releases Wiki Activity
linux-stable/include
History
James Bottomley 871dd9286e block: fix max discard sectors limit 
linux-v3.8-rc1 and later support for plug for blkdev_issue_discard with
commit 0cfbcafcae
(block: add plug for blkdev_issue_discard )

For example,
1) DISCARD rq-1 with size size 4GB
2) DISCARD rq-2 with size size 1GB

If these 2 discard requests get merged, final request size will be 5GB.

In this case, request's __data_len field may overflow as it can store
max 4GB(unsigned int).

This issue was observed while doing mkfs.f2fs on 5GB SD card:
https://lkml.org/lkml/2013/4/1/292

Info: sector size = 512
Info: total sectors = 11370496 (in 512bytes)
Info: zone aligned segment0 blkaddr: 512
[  257.789764] blk_update_request: bio idx 0 >= vcnt 0

mkfs process gets stuck in D state and I see the following in the dmesg:

[  257.789733] __end_that: dev mmcblk0: type=1, flags=122c8081
[  257.789764]   sector 4194304, nr/cnr 2981888/4294959104
[  257.789764]   bio df3840c0, biotail df3848c0, buffer   (null), len
1526726656
[  257.789764] blk_update_request: bio idx 0 >= vcnt 0
[  257.794921] request botched: dev mmcblk0: type=1, flags=122c8081
[  257.794921]   sector 4194304, nr/cnr 2981888/4294959104
[  257.794921]   bio df3840c0, biotail df3848c0, buffer   (null), len
1526726656

This patch fixes this issue.

Reported-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-04-24 08:52:50 -06:00
..
acpi Fixes: 2013-03-12 20:25:53 -07:00
asm-generic asm-generic: move cmpxchg*_local defs to cmpxchg.h 2013-03-13 06:11:05 +01:00
clocksource ImgTec Meta architecture changes for v3.9-rc1 2013-03-03 12:06:09 -08:00
crypto
drm drm/radeon: add Richland pci ids 2013-03-15 18:47:19 -04:00
keys
linux block: fix max discard sectors limit 2013-04-24 08:52:50 -06:00
math-emu
media
memory
misc
net ipv4: Fix ip-header identification for gso packets. 2013-03-26 13:50:05 -04:00
pcmcia
ras
rdma
rxrpc
scsi SCSI for-linus on 20130301 2013-03-02 11:42:16 -08:00
sound arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
target target: Rename spc_get_write_same_sectors -> sbc_get_write_same_sectors 2013-02-23 12:46:14 -08:00
trace Merge branch 'writeback-workqueue' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq into for-3.10/core 2013-04-02 10:04:39 +02:00
uapi net: fix *_DIAG_MAX constants 2013-03-21 12:36:33 -04:00
video ARM: at91: fix LCD-wiring mode 2013-03-13 11:05:04 +01:00
xen for-linus-20130331 2013-03-31 11:38:59 -07:00
Kbuild