Raghavendra K T 9967d8ac5c null_blk: Null pointer deference problem in alloc_page_buffers ...

If we load the null_blk module with bs=8k we get following oops:
[ 3819.812190] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 3819.812387] IP: [<ffffffff81170aa5>] create_empty_buffers+0x28/0xaf
[ 3819.812527] PGD 219244067 PUD 215a06067 PMD 0
[ 3819.812640] Oops: 0000 [#1] SMP
[ 3819.812772] Modules linked in: null_blk(+)

 Fix that by resetting block size to PAGE_SIZE if it is greater than PAGE_SIZE

Reported-by: Sumanth <sumantk2@linux.vnet.ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Reviewed-by: Matias Bjorling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2014-01-21 20:22:40 -08:00

..

aoe

aoe: Convert to immutable biovecs

2013-11-23 22:33:52 -08:00

drbd

block: Immutable bio vecs

2013-11-23 22:33:49 -08:00

mtip32xx

mtip32xx: Correctly handle security locked condition

2014-01-21 20:20:44 -08:00

paride

drivers/block/paride/pg.c: underflow bug in pg_write()

2014-01-21 20:16:56 -08:00

rsxx

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

xen-blkback

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

amiflop.c

tree-wide: use reinit_completion instead of INIT_COMPLETION

2013-11-15 09:32:21 +09:00

ataflop.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

brd.c

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

cciss_cmd.h

cciss: use new doorbell-bit-5 reset method

2011-05-06 08:23:55 -06:00

cciss_scsi.c

cciss: switch to ->show_info()

2013-04-09 14:13:19 -04:00

cciss_scsi.h

cciss: add cciss_tape_cmds module paramter

2011-05-06 08:23:59 -06:00

cciss.c

drivers/block/cciss.c:cciss_init_one(): use proper errnos

2014-01-21 20:16:56 -08:00

cciss.h

cciss: Adds simple mode functionality

2011-08-08 11:40:15 +02:00

cpqarray.c

cpqarray: fix info leak in ida_locked_ioctl()

2013-09-24 17:00:26 -07:00

cpqarray.h

…

cryptoloop.c

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

DAC960.c

procfs: new helper - PDE_DATA(inode)

2013-04-09 14:13:32 -04:00

DAC960.h

…

floppy.c

floppy: bail out in open() if drive is not responding to block0 read

2014-01-17 11:12:06 +01:00

hd.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

ida_cmd.h

…

ida_ioctl.h

…

Kconfig

Merge branch 'for-3.13/post-mq-drivers' into for-linus

2013-11-14 08:29:01 -07:00

loop.c

drivers/block/loop.c: fix comment typo in loop_config_discard

2014-01-21 20:16:56 -08:00

loop.h

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

Makefile

Merge branch 'for-3.13/post-mq-drivers' into for-linus

2013-11-14 08:29:01 -07:00

mg_disk.c

mg_disk: remove deprecated IRQF_DISABLED

2013-11-08 09:10:27 -07:00

nbd.c

block: Immutable bio vecs

2013-11-23 22:33:49 -08:00

null_blk.c

null_blk: Null pointer deference problem in alloc_page_buffers

2014-01-21 20:22:40 -08:00

nvme-core.c

block: Introduce new bio_split()

2013-11-23 22:33:57 -08:00

nvme-scsi.c

NVMe: Use kzalloc instead of kmalloc+memset

2013-06-19 13:24:27 -04:00

osdblk.c

block: replace strict_strtoul() with kstrtoul()

2013-09-11 15:56:56 -07:00

pktcdvd.c

pktcdvd: fix error return code

2014-01-03 10:05:34 +01:00

ps3disk.c

block: Kill bio_segments()/bi_vcnt usage

2013-11-23 22:33:51 -08:00

ps3vram.c

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

rbd_types.h

rbd: get rid of RBD_MAX_SEG_NAME_LEN

2012-12-17 08:37:29 -06:00

rbd.c

rbd: Refactor bio cloning

2013-11-23 22:33:54 -08:00

skd_main.c

drivers: block: Mark the functions as static in skd_main.c

2013-12-19 08:06:49 -07:00

skd_s1120.h

skd: fix formatting in skd_s1120.h

2013-11-08 09:10:30 -07:00

smart1,2.h

fix typos 'comamnd' -> 'command' in comments

2011-02-02 11:31:21 +01:00

sunvdc.c

sunvdc: Fix off-by-one in generic_request().

2013-02-14 11:49:01 -08:00

swim3.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

swim_asm.S

m68k: mac - Add SWIM floppy support

2009-03-26 21:15:27 +01:00

swim.c

drivers/block/swim.c: remove unnecessary platform_set_drvdata()

2013-09-11 15:56:59 -07:00

sx8.c

drivers/block/sx8.c: remove unnecessary pci_set_drvdata()

2014-01-21 20:16:56 -08:00

umem.c

block: Convert drivers to immutable biovecs

2013-11-23 22:33:51 -08:00

umem.h

…

virtio_blk.c

virtio-blk: virtqueue_kick() must be ordered with other virtqueue operations

2013-11-19 19:00:45 -07:00

xen-blkfront.c

Linux 3.13-rc6

2013-12-31 09:51:02 -07:00

xsysace.c

xilinx systemace: Fix sparse warnings

2013-07-10 07:47:12 +02:00

z2ram.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00