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Tue, 10 Sep 2024 12:55:43 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-378956de262sm9687135f8f.112.2024.09.10.12.55.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Sep 2024 12:55:42 -0700 (PDT) Date: Tue, 10 Sep 2024 22:55:38 +0300 From: Dan Carpenter To: Bryan O'Donoghue Cc: Robert Foss , Todor Tomov , Mauro Carvalho Chehab , Hans Verkuil , Konrad Dybcio , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] media: qcom: camss: Fix potential crash in cleanup in camss_configure_pd() Message-ID: <7883f30a-0646-440c-95d5-937062ce10b6@moroto.mountain> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding X-LSpam-Score: -6.3 (------) X-LSpam-Report: No, score=-6.3 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_VALIDITY_CERTIFIED=-3,RCVD_IN_VALIDITY_RPBL=1.31,RCVD_IN_VALIDITY_SAFE=-2,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=ham autolearn_force=no This function calls dev_pm_domain_detach(camss->genpd, true) in the cleanup path. But calling detach is only necessary if the attach succeeded. If it didn't succeed then "camss->genpd" is either an error pointer or NULL and it leads to a crash. Fixes: 23aa4f0cd327 ("media: qcom: camss: Move VFE power-domain specifics into vfe.c") Signed-off-by: Dan Carpenter --- drivers/media/platform/qcom/camss/camss.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index 1923615f0eea..f4531e7341d4 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -2130,10 +2130,8 @@ static int camss_configure_pd(struct camss *camss) if (camss->res->pd_name) { camss->genpd = dev_pm_domain_attach_by_name(camss->dev, camss->res->pd_name); - if (IS_ERR(camss->genpd)) { - ret = PTR_ERR(camss->genpd); - goto fail_pm; - } + if (IS_ERR(camss->genpd)) + return PTR_ERR(camss->genpd); } if (!camss->genpd) { @@ -2141,13 +2141,10 @@ static int camss_configure_pd(struct camss *camss) */ camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1); - } - if (IS_ERR_OR_NULL(camss->genpd)) { + if (IS_ERR(camss->genpd)) + return PTR_ERR(camss->genpd); if (!camss->genpd) - ret = -ENODEV; - else - ret = PTR_ERR(camss->genpd); - goto fail_pm; + return -ENODEV; } camss->genpd_link = device_link_add(camss->dev, camss->genpd, DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |