Avoid returning success when max_append_sectors is zero. This prevents infinite loop in bio_iov_iter_get_pages().
Signed-off-by: Kanchan Joshi <[email protected]> Signed-off-by: Selvakumar S <[email protected]> Signed-off-by: Nitesh Shetty <[email protected]> Signed-off-by: Javier Gonzalez <[email protected]> Reviewed-by: Damien Le Moal <[email protected]> --- block/bio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bio.c b/block/bio.c index a7366c0..0cecdbc 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1044,7 +1044,7 @@ static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *iter) size_t offset; if (WARN_ON_ONCE(!max_append_sectors)) - return 0; + return -EINVAL; /* * Move page array up in the allocated memory for the bio vecs as far as -- 2.7.4
