[PATCH AUTOSEL 4.9 05/13] scsi: sg: add sg_remove_request in sg_common_write

[Sasha Levin]

From: Li Bin <huawei.libin@xxxxxxxxxx>

[ Upstream commit 849f8583e955dbe3a1806e03ecacd5e71cce0a08 ]

If the dxfer_len is greater than 256M then the request is invalid and we
need to call sg_remove_request in sg_common_write.

Link: https://lore.kernel.org/r/1586777361-17339-1-git-send-email-huawei.libin@xxxxxxxxxx
Fixes: f930c7043663 ("scsi: sg: only check for dxfer_len greater than 256M")
Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Signed-off-by: Li Bin <huawei.libin@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/sg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 8d9b416399f92..c924df5538ddc 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -809,8 +809,10 @@ sg_common_write(Sg_fd * sfp, Sg_request * srp,
 			"sg_common_write:  scsi opcode=0x%02x, cmd_size=%d\n",
 			(int) cmnd[0], (int) hp->cmd_len));
 
-	if (hp->dxfer_len >= SZ_256M)
+	if (hp->dxfer_len >= SZ_256M) {
+		sg_remove_request(sfp, srp);
 		return -EINVAL;
+	}
 
 	k = sg_start_req(srp, cmnd);
 	if (k) {
-- 
2.20.1