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Merge branch 'next/deletion' of git+ssh://master.kernel.org/pub/scm/linux/kernel...
[firefly-linux-kernel-4.4.55.git]
/
block
/
blk-map.c
diff --git
a/block/blk-map.c
b/block/blk-map.c
index d4a586d8691ec5ed37311d1e3fc76aa0c310828f..e663ac2d8e68f70ff17ce274f3cebec16c1dd18c 100644
(file)
--- a/
block/blk-map.c
+++ b/
block/blk-map.c
@@
-201,6
+201,9
@@
int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
for (i = 0; i < iov_count; i++) {
unsigned long uaddr = (unsigned long)iov[i].iov_base;
+ if (!iov[i].iov_len)
+ return -EINVAL;
+
if (uaddr & queue_dma_alignment(q)) {
unaligned = 1;
break;