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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-04-13 20:03:10 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-04-15 12:10:11 +0200
commit91e463c8f5f7a5b09d3d034c01a88567af60c504 (patch)
treeb37b3402f7eb55e9f899d63faf1e2ec520c0a3c7 /block/scsi_ioctl.c
parentd6ceb25e8d8bccf826848c2621a50d02c0a7f4ae (diff)
downloadlinux-91e463c8f5f7a5b09d3d034c01a88567af60c504.tar.gz
block: fix SG_IO to return a proper error value
blk_rq_unmap_user() returns -EFAULT if a program passes an invalid address to kernel. SG_IO path needs to pass the returned value to user space instead of ignoring it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/scsi_ioctl.c')
-rw-r--r--block/scsi_ioctl.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 626ee274c5c..84b7f8709f4 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -217,7 +217,7 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
struct bio *bio)
{
- int ret = 0;
+ int r, ret = 0;
/*
* fill in all the output members
@@ -242,7 +242,9 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
ret = -EFAULT;
}
- blk_rq_unmap_user(bio);
+ r = blk_rq_unmap_user(bio);
+ if (!ret)
+ ret = r;
blk_put_request(rq);
return ret;