Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-29 09:12:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Don't feed anything but regular iovec's to blk_rq_map_user_iov

Browse Source 
In theory we could map other things, but there's a reason that function
is called "user_iov".  Using anything else (like splice can do) just
confuses it.

Reported-and-tested-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2016-12-06 16:18:14 -08:00
parent bc3913a537
commit a0ac402cfc
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/blk-map.c
View File

@ -118,6 +118,9 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
struct iov_iter i;
int ret;
if (!iter_is_iovec(iter))
goto fail;
if (map_data)
copy = true;
else if (iov_iter_alignment(iter) & align)
@ -140,6 +143,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
unmap_rq:
__blk_rq_unmap_user(bio);
fail:
rq->bio = NULL;
return -EINVAL;
}