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authorChristof Schmitt <christof.schmitt@de.ibm.com>2009-09-17 09:10:14 +0200
committerJames Bottomley <James.Bottomley@suse.de>2009-10-02 09:45:58 -0500
commite27168f8c337b12b8aa8d59c3123c79d2f83603d (patch)
tree947d5e483ca1d4ee0bbbbdc7abf317f1f591dbd0 /sound
parent5915136d4d3954867cced8a2297bddd16caf36a1 (diff)
[SCSI] sg: Free data buffers after calling blk_rq_unmap_user
Running sg_luns on s390x with CONFIG_DEBUG_PAGEALLOC enabled fails with EFAULT from the SG_IO ioctl. The EFAULT is the result from copy_to_user failing in this call chain: sg_ioctl sg_new_read sg_finish_rem_req blk_rq_unmap_user __blk_rq_unmap_user bio_uncopy_user __bio_copy_iov copy_to_user The sg driver calls sg_remove_scat to free the memory pages before calling blk_rq_unmap_user that tries to copy the data back to userspace. Change the order to first call blk_rq_unmap_user before freeing the pages in sg_remove_scat. Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: stable@kernel.org Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions