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[49.180.91.142]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b4cd092e2aasm15717404a12.21.2025.09.03.20.25.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Sep 2025 20:25:07 -0700 (PDT) Received: from dave by dread.disaster.area with local (Exim 4.98.2) (envelope-from ) id 1uu0au-0000000EzjC-2HuE; Thu, 04 Sep 2025 13:25:04 +1000 Date: Thu, 4 Sep 2025 13:25:04 +1000 From: Dave Chinner To: "HONG, Yun" Cc: "leah.rumancik@gmail.com" , "djwong@kernel.org" , "linux-xfs@vger.kernel.org" Subject: Re: [Crash Report] BUG: kernel NULL pointer dereference in xlog_cil_commit on 5.15 LTS kernel Message-ID: References: Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Thu, Sep 04, 2025 at 02:54:42AM +0000, HONG, Yun wrote: > Hi, > > We would like to kindly report a crash we encountered, identified as "BUG: unable to handle kernel NULL pointer dereference in xlog_cil_commit", during our fuzzing tests on Linux 5.15. This issue has been successfully reproduced on the long-term support release Linux 5.15.190. Fixed a long time ago by commit 8dc9384b7d75 ("xfs: reduce kvmalloc overhead for CIL shadow buffers"). Please only report fuzzer bugs if they can be reproduced on a current top of tree kernel release. If they can't, then we've already fixed it. In that case, you can easily do the work (e.g. a bisect) to find which commit fixed it yourself.... -Dave. -- Dave Chinner david@fromorbit.com