Commit 76f6777c authored by David Howells's avatar David Howells Committed by Linus Torvalds
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pipe: Fix iteration end check in fuse_dev_splice_write() 



Fix the iteration end check in fuse_dev_splice_write().  The iterator
position can only be compared with == or != since wrappage may be involved.

Fixes: 8cefc107 ("pipe: Use head and tail pointers for the ring, not cursor and length")
Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 43a28986

fs/fuse/dev.c

+1 −1
Original line number Diff line number Diff line
@@ -1965,7 +1965,7 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe, 


	nbuf = 0;

	rem = 0;

	for (idx = tail; idx < head && rem < len; idx++)

	for (idx = tail; idx != head && rem < len; idx++)

		rem += pipe->bufs[idx & mask].len;



	ret = -EINVAL;