| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 026/411] media: venus: hfi: avoid null dereference in deinit | Date | Mon, 13 Jun 2022 12:04:59 +0200 |
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From: Luca Weiss <luca.weiss@fairphone.com>
[ Upstream commit 86594f6af867b5165d2ba7b5a71fae3a5961e56c ]
If venus_probe fails at pm_runtime_put_sync the error handling first calls hfi_destroy and afterwards hfi_core_deinit. As hfi_destroy sets core->ops to NULL, hfi_core_deinit cannot call the core_deinit function anymore.
Avoid this null pointer derefence by skipping the call when necessary.
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/platform/qcom/venus/hfi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/media/platform/qcom/venus/hfi.c b/drivers/media/platform/qcom/venus/hfi.c index 3d8b1284d1f3..68964a80fe61 100644 --- a/drivers/media/platform/qcom/venus/hfi.c +++ b/drivers/media/platform/qcom/venus/hfi.c @@ -104,6 +104,9 @@ int hfi_core_deinit(struct venus_core *core, bool blocking) mutex_lock(&core->lock); } + if (!core->ops) + goto unlock; + ret = core->ops->core_deinit(core); if (!ret) -- 2.35.1
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