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OpenCloudOS-Kernel
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David Vrabel 0e367ae465 xen/blkback: correctly respond to unknown, non-native requests 
If the frontend is using a non-native protocol (e.g., a 64-bit
frontend with a 32-bit backend) and it sent an unrecognized request,
the request was not translated and the response would have the
incorrect ID.  This may cause the frontend driver to behave
incorrectly or crash.

Since the ID field in the request is always in the same place,
regardless of the request type we can get the correct ID and make a
valid response (which will report BLKIF_RSP_EOPNOTSUPP).

This bug affected 64-bit SLES 11 guests when using a 32-bit backend.
This guest does a BLKIF_OP_RESERVED_1 (BLKIF_OP_PACKET in the SLES
source) and would crash in blkif_int() as the ID in the response would
be invalid.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: stable@vger.kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
 		2013-03-11 13:54:28 -04:00
..
aoe aoe: fix use after free in aoedev_by_aoeaddr() 2012-12-17 17:15:26 -08:00
drbd drbd: fix potential protocol error and resulting disconnect/reconnect 2013-01-21 22:58:36 +01:00
mtip32xx mtip32xx: fix for crash when the device surprise removed during rebuild 2013-01-11 14:35:58 +01:00
paride paride/pcd: fix bool verbose module parameter. 2012-01-13 09:32:26 +10:30
xen-blkback xen/blkback: correctly respond to unknown, non-native requests 2013-03-11 13:54:28 -04:00
DAC960.c dac960: Remove unused variables from DAC960_CreateProcEntries() 2012-05-11 16:42:14 +02:00
DAC960.h
…
Kconfig cciss: select CONFIG_CHECK_SIGNATURE 2012-10-30 08:37:00 +01:00
Makefile block: remove the deprecated ub driver 2012-09-05 17:18:53 -07:00
amiflop.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
ataflop.c block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers 2011-04-21 21:33:05 +02:00
brd.c block: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:16 +08:00
cciss.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
cciss.h cciss: Adds simple mode functionality 2011-08-08 11:40:15 +02:00
cciss_cmd.h cciss: use new doorbell-bit-5 reset method 2011-05-06 08:23:55 -06:00
cciss_scsi.c cciss: fix handling of protocol error 2012-09-18 11:57:08 +02:00
cciss_scsi.h cciss: add cciss_tape_cmds module paramter 2011-05-06 08:23:59 -06:00
cpqarray.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
cpqarray.h
…
cryptoloop.c
…
floppy.c floppy: destroy floppy workqueue before cleaning up the queue 2012-11-23 14:32:54 +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
…
loop.c Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block 2012-12-17 13:39:11 -08:00
mg_disk.c mg_disk: Use struct dev_pm_ops for power management 2012-07-06 19:07:00 +02:00
nbd.c nbd: handle discard requests 2012-10-06 03:05:24 +09:00
nvme.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
osdblk.c block: Add bio_clone_bioset(), bio_clone_kmalloc() 2012-09-09 10:35:39 +02:00
pktcdvd.c pktcdvd: Switch to bio_kmalloc() 2012-09-09 10:35:39 +02:00
ps3disk.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
ps3vram.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
rbd.c rbd: get rid of rbd_{get,put}_dev() 2012-12-20 10:56:44 -06:00
rbd_types.h rbd: get rid of RBD_MAX_SEG_NAME_LEN 2012-12-17 08:37:29 -06:00
smart1,2.h fix typos 'comamnd' -> 'command' in comments 2011-02-02 11:31:21 +01:00
sunvdc.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
swim.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
swim3.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
swim_asm.S m68k: mac - Add SWIM floppy support 2009-03-26 21:15:27 +01:00
sx8.c block, sx8: fix pointer math issue getting fw version 2012-03-03 19:44:39 +01:00
umem.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
umem.h
…
virtio_blk.c Various minor fixes, but a slightly more complex one to fix the per-cpu overload 2013-01-20 16:44:28 -08:00
xd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
xd.h [PATCH] switch xd 2008-10-21 07:48:11 -04:00
xen-blkfront.c xen-blkfront: drop the use of llist_for_each_entry_safe 2013-02-19 15:17:08 -05:00
xsysace.c Drivers: block: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
z2ram.c drivers/block/z2ram.c: correct printing of sector_t 2010-10-28 06:15:26 -06:00