From: Varun Prakash Date: Wed, 18 Dec 2019 13:45:31 +0000 (+0530) Subject: scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=71482fde704efdd8c3abe0faf34d922c61e8d76b;p=openwrt%2Fstaging%2Fblogic.git scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy() 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 Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c index 0d044c165960..dc9320f37ebf 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);