From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Varun Prakash <varun@chelsio.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Sasha Levin <sashal@kernel.org>,
linux-scsi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 3/4] scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy()
Date: Fri, 3 Jan 2020 22:37:01 -0500 [thread overview]
Message-ID: <20200104033702.11304-3-sashal@kernel.org> (raw)
In-Reply-To: <20200104033702.11304-1-sashal@kernel.org>
From: Varun Prakash <varun@chelsio.com>
[ Upstream commit 71482fde704efdd8c3abe0faf34d922c61e8d76b ]
If cxgb4i_ddp_init() fails then cdev->cdev2ppm will be NULL, so add a check
for NULL pointer before dereferencing it.
Link: https://lore.kernel.org/r/1576676731-3068-1-git-send-email-varun@chelsio.com
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/cxgbi/libcxgbi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index e974106f2bb5..3d6e653f5147 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -121,7 +121,8 @@ static inline void cxgbi_device_destroy(struct cxgbi_device *cdev)
"cdev 0x%p, p# %u.\n", cdev, cdev->nports);
cxgbi_hbas_remove(cdev);
cxgbi_device_portmap_cleanup(cdev);
- cxgbi_ppm_release(cdev->cdev2ppm(cdev));
+ if (cdev->cdev2ppm)
+ cxgbi_ppm_release(cdev->cdev2ppm(cdev));
if (cdev->pmap.max_connect)
cxgbi_free_big_mem(cdev->pmap.port_csk);
kfree(cdev);
--
2.20.1
parent reply other threads:[~2020-01-04 3:37 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20200104033702.11304-1-sashal@kernel.org>]
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