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author | Boaz Harrosh <bharrosh@panasas.com> | 2009-02-03 07:47:29 +0100 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2009-02-18 10:32:00 +0100 |
commit | c1c201200a359cf3b6e2e36a4236cdca77a3cd8e (patch) | |
tree | e214a2773f20b814cb8cc8c5509066cd9ec98a1a /lib | |
parent | 5955c7a2cfb6a35429adea5dc480002b15ca8cfc (diff) | |
download | linux-c1c201200a359cf3b6e2e36a4236cdca77a3cd8e.tar.bz2 |
bsg: Fix sense buffer bug in SG_IO
When submitting requests via SG_IO, which does a sync io, a
bsg_command is not allocated. So an in-Kernel sense_buffer was not
set. However when calling blk_execute_rq() with no sense buffer
one is provided from the stack. Now bsg at blk_complete_sgv4_hdr_rq()
would check if rq->sense_len and a sense was requested by sg_io_v4
the rq->sense was copy_user() back, but by now it is already mangled
stack memory.
I have fixed that by forcing a sense_buffer when calling bsg_map_hdr().
The bsg_command->sense is provided in the write/read path like before,
and on-the-stack buffer is provided when doing SG_IO.
I have also fixed a dprintk message to print rq->errors in hex because
of the scsi bit-field use of this member. For other block devices it
does not matter anyway.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions