| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 44/97] scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy() | Date | Wed, 22 Jan 2020 10:28:48 +0100 |
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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
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