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<20260515152529.1007540-1-dawei.feng@seu.edu.cn> Subject: Re: [PATCH] media: bcm2835-unicam: fix dummy buffer double free when register fails Content-Language: en-GB, de-DE From: Markus Elfring In-Reply-To: <20260515152529.1007540-1-dawei.feng@seu.edu.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:tx80KagCZZJg1dCw/zekfsK+LD3m2hVT3DSIOs3jDkDfennHF7w WD7aauMj07KuadCyu/H0jhPBcTamU4EQ1nzJbns08ZjECWQMzJkuYac4lCsY6nxkTfHttDC lHrQv3gUKlx57gbE5Zk/7c4m76Jr17+T65oWtaafHCc81yTDGGEaatR0keosZu8b/my1J8z 5b+29JIIRL0IbQ7fcHeEA== UI-OutboundReport: notjunk:1;M01:P0:U7Rbl2jFnrY=;qmpmyer6HO8vle17dbUrkTN9dpn kQohuQPLxRkzbdd45oy44M10JxWHNMFIHNkxxp38vm55Tj80BYT37r8ayzVYpJz/AR9MhI1rX qReItduLTfFvbsABHNUKitNqzaYktJo9RvgmMTLxA5Z+d+6Dt/ustNNtBWdKM5LXOy0MPqW7l ptnGCovdpnkWmQ1MXYoYfAlM5y0gygNeave3Ehp84QaPZ/7C84CJdV6OwWlb5plencU/i6gHf U0Cv3iMS2warfBuGoiULWcQV3pdcKPbrIEvQARbJQ8WT3NDAoqgPJL7ovKfUCjv42t6mLY0k9 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org =E2=80=A6 > Set dummy_buf_cpu_addr to NULL after dma_free_coherent() in both the > local error path and unicam_unregister_nodes() so later cleanup skips =E2=80=A6 so that? > The bug was first flagged by an experimental analysis tool we are > developing for kernel memory-management bugs while analyzing > v6.13-rc1. The tool is still under development and is not yet publicly > available. Manual inspection confirms that the bug is still > present in v7.1-rc3. Under which circumstances will the mentioned software revision gap be adjusted accordingly? Regards, Markus