linux-kernel - [PATCH AUTOSEL 6.13 14/21] scsi: qla1280: Fix kernel oops when debug level

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Message-Id: <20250211012954.4096433-14-sashal@kernel.org>
Date: Mon, 10 Feb 2025 20:29:47 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Magnus Lindholm <linmag7@...il.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>,
	Sasha Levin <sashal@...nel.org>,
	mdr@....com,
	James.Bottomley@...senPartnership.com,
	linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 6.13 14/21] scsi: qla1280: Fix kernel oops when debug level > 2

From: Magnus Lindholm <linmag7@...il.com>

[ Upstream commit 5233e3235dec3065ccc632729675575dbe3c6b8a ]

A null dereference or oops exception will eventually occur when qla1280.c
driver is compiled with DEBUG_QLA1280 enabled and ql_debug_level > 2.  I
think its clear from the code that the intention here is sg_dma_len(s) not
length of sg_next(s) when printing the debug info.

Signed-off-by: Magnus Lindholm <linmag7@...il.com>
Link: https://lore.kernel.org/r/20250125095033.26188-1-linmag7@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/qla1280.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c
index 8958547ac111a..fed07b1460702 100644
--- a/drivers/scsi/qla1280.c
+++ b/drivers/scsi/qla1280.c
@@ -2867,7 +2867,7 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
 			dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n",
 				cpu_to_le32(upper_32_bits(dma_handle)),
 				cpu_to_le32(lower_32_bits(dma_handle)),
-				cpu_to_le32(sg_dma_len(sg_next(s))));
+				cpu_to_le32(sg_dma_len(s)));
 			remseg--;
 		}
 		dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather "
-- 
2.39.5