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drm/msm: prevent NULL dereference in msm_gpu_crashstate_capture()

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Coverity complains of a possible NULL dereference:

CID 120718 (#1 of 1): Dereference null return value (NULL_RETURNS)
23. dereference: Dereferencing a pointer that might be NULL state->bos when
    calling msm_gpu_crashstate_get_bo. [show details]
301                        msm_gpu_crashstate_get_bo(state, submit->bos[i].obj,
302                                submit->bos[i].iova, submit->bos[i].flags);

Fix this by employing the same state->bos NULL check as is used in the next
for loop.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210929162554.14295-1-tim.gardner@canonical.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Tim Gardner 2021-09-29 10:25:54 -06:00 committed by Rob Clark
parent 76544e4bb1
commit b220c15483
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/msm/msm_gpu.c
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@ -296,7 +296,7 @@ static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
state->bos = kcalloc(nr,
sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
for (i = 0; i < submit->nr_bos; i++) {
for (i = 0; state->bos && i < submit->nr_bos; i++) {
if (should_dump(submit, i)) {
msm_gpu_crashstate_get_bo(state, submit->bos[i].obj,
submit->bos[i].iova, submit->bos[i].flags);