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authorDavid Howells <dhowells@redhat.com>2019-12-06 21:34:51 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-06 13:57:04 -0800
commit76f6777c9cc04efe8036b1d2aa76e618c1631cc6 (patch)
treed6383685fe462de7eb3007541ee2e26a03b2927d /fs
parent43a2898631a8beee66c1d64c1e860f43d96b2e91 (diff)
downloadlinux-76f6777c9cc04efe8036b1d2aa76e618c1631cc6.tar.bz2
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: 8cefc107ca54 ("pipe: Use head and tail pointers for the ring, not cursor and length") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fuse/dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index d4e6691d2d92..8e02d76fe104 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -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;