A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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msm: camera: smmu: Avoid NULL dereference in cam_smmu_alloc_firmware

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The iommu domain we grab from iommu_get_domain_for_dev can
be NULL. Eventually we will hit a NULL dereference in the
cam_smmu_alloc_firmware due to the missing check. Modify the
existing check to account for the possiblity of a NULL
domain and bail early.

CRs-Fixed: 2804766
Change-Id: I201260c3559b847cfb0bf7f85226816af148671d
Signed-off-by: Fernando Pacheco <fpacheco@codeaurora.org>
This commit is contained in:
Fernando Pacheco 2020-10-23 13:56:35 -07:00
commit 4e09bf5f97
1 changed files with 1 additions and 1 deletions
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2
drivers/cam_smmu/cam_smmu_api.c
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@ -3552,7 +3552,7 @@ static int cam_smmu_setup_cb(struct cam_context_bank_info *cb,
/* create a virtual mapping */
if (cb->io_support) {
cb->domain = iommu_get_domain_for_dev(dev);
if (IS_ERR(cb->domain)) {
if (IS_ERR_OR_NULL(cb->domain)) {
CAM_ERR(CAM_SMMU, "Error: create domain Failed");
rc = -ENODEV;
goto end;