Konrad Rzeszutek Wilk 8c9ce606a6 xen/blkback: Copy id field when doing BLKIF_DISCARD. ... We weren't copying the id field so when we sent the response back to the frontend (especially with a 64-bit host and 32-bit guest), we ended up using a random value. This lead to the frontend crashing as it would try to pass to __blk_end_request_all a NULL 'struct request' (b/c it would use the 'id' to find the proper 'struct request' in its shadow array) and end up crashing: BUG: unable to handle kernel NULL pointer dereference at 000000e4 IP: [<c0646d4c>] __blk_end_request_all+0xc/0x40 .. snip.. EIP is at __blk_end_request_all+0xc/0x40 .. snip.. [<ed95db72>] blkif_interrupt+0x172/0x330 [xen_blkfront] This fixes the bug by passing in the proper id for the response. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=824641 CC: stable@kernel.org Tested-by: William Dauchy <wdauchy@gmail.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>		2012-05-30 17:20:04 -04:00
..
blkback.c	xen/blkback: Squash the discard support for 'file' and 'phy' type.	2012-03-24 10:04:35 -04:00
common.h	xen/blkback: Copy id field when doing BLKIF_DISCARD.	2012-05-30 17:20:04 -04:00
Makefile	xen/blkback: Squash vbd.c,interface.c in blkback.c and xenbus.c respectivly.	2011-04-20 11:57:59 -04:00
xenbus.c	xen/blkback: Make optional features be really optional.	2012-03-24 10:04:36 -04:00