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From: Luca Weiss <luca.weiss@fairphone.com>
To: linux-arm-msm@vger.kernel.org
Cc: ~postmarketos/upstreaming@lists.sr.ht,
	Luca Weiss <luca.weiss@fairphone.com>,
	Stanimir Varbanov <stanimir.varbanov@linaro.org>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] media: venus: hfi: avoid null dereference in deinit
Date: Fri, 14 Jan 2022 12:02:26 +0100	[thread overview]
Message-ID: <20220114110226.130380-2-luca.weiss@fairphone.com> (raw)
In-Reply-To: <20220114110226.130380-1-luca.weiss@fairphone.com>

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>
---
 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 4e2151fb47f0..1968f09ad177 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)
-- 
2.34.1


  reply	other threads:[~2022-01-14 11:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-14 11:02 [PATCH 1/2] media: venus: hfi: Add error message for timeout error Luca Weiss
2022-01-14 11:02 ` Luca Weiss [this message]
2022-03-25  7:58 ` Luca Weiss

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