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-rw-r--r--block/io.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/block/io.c b/block/io.c
index ab953bd58f..c8c9dea554 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1565,8 +1565,12 @@ static bool bdrv_init_padding(BlockDriverState *bs,
int64_t offset, int64_t bytes,
BdrvRequestPadding *pad)
{
- uint64_t align = bs->bl.request_alignment;
- size_t sum;
+ int64_t align = bs->bl.request_alignment;
+ int64_t sum;
+
+ bdrv_check_request(offset, bytes, &error_abort);
+ assert(align <= INT_MAX); /* documented in block/block_int.h */
+ assert(align <= SIZE_MAX / 2); /* so we can allocate the buffer */
memset(pad, 0, sizeof(*pad));