[PATCH] pktcdvd: fix missing bio_alloc_clone NULL check in pkt_make_request_read

[Ye Chey <yechey@xxxxxxxxxxx>]

The bio_alloc_clone() call in pkt_make_request_read() lacks NULL check,
which could lead to NULL pointer dereference. Add NULL check and handle
allocation failure by calling bio_io_error().

Signed-off-by: Ye Chey <yechey@xxxxxxxxxxx>
---
 drivers/block/pktcdvd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 65b96c083..68d1f43a7 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2323,6 +2323,10 @@ static void pkt_make_request_read(struct pktcdvd_device *pd, struct bio *bio)
 {
 	struct bio *cloned_bio = bio_alloc_clone(file_bdev(pd->bdev_file), bio,
 		GFP_NOIO, &pkt_bio_set);
+	if (!cloned_bio) {
+		bio_io_error(bio);
+		return;
+	}
 	struct packet_stacked_data *psd = mempool_alloc(&psd_pool, GFP_NOIO);
 
 	psd->pd = pd;
-- 
2.44.0