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scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy() 

[ Upstream commit 71482fde70 ]

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>
5.4-rM2-2.2.x-imx-squashed
Varun Prakash 2019-12-18 19:15:31 +05:30 committed by Greg Kroah-Hartman
parent f44e6a300d
commit 2921fd9b30
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/cxgbi/libcxgbi.c
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@ -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);