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AJvYcCVUtyWAdTfb3B7QHmG2uY0nNjQamI2oiPmORvipNnAs49EfQejpe7g00zx3vS8NdLlPNi1sIipNCdErhqAncjMfUxjd6M0B6uufO3zTWMRRgB2I54xUR5ipSGpHpjApoM73x8iAF98Mzrg0iA== X-Gm-Message-State: AOJu0YwzUigU8D8N5wabKiSHSLyNZKAupDi3JZhgSipTd0CQwEM2d/Sf M7fn17ZOsKkJResrB6ou+dHYCY/ZOXeUvLus6HyeJzP8s49VSi0u X-Received: by 2002:a17:903:284:b0:1e0:dc6e:45d6 with SMTP id j4-20020a170903028400b001e0dc6e45d6mr7878661plr.60.1714049078305; Thu, 25 Apr 2024 05:44:38 -0700 (PDT) Received: from kernelexploit-virtual-machine.localdomain ([121.185.186.233]) by smtp.gmail.com with ESMTPSA id b3-20020a170902650300b001ea2838fa5dsm4920064plk.76.2024.04.25.05.44.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Apr 2024 05:44:38 -0700 (PDT) From: Jeongjun Park To: willy@infradead.org Cc: brauner@kernel.org, eadavis@qq.com, jfs-discussion@lists.sourceforge.net, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzbot+241c815bda521982cb49@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com Subject: Re: [PATCH] jfs: Fix array-index-out-of-bounds in diFree Date: Thu, 25 Apr 2024 21:44:33 +0900 Message-Id: <20240425124433.28645-1-aha310510@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Through direct testing and debugging, I've determined that this vulnerability occurs when mounting an incorrect image, leading to the potential passing of an excessively large value to 'sbi->bmap->db_agl2size'. Importantly, there have been no instances of memory corruption observed within 'sbi->bmap->db_agl2size'. Therefore, I think implementing a patch that terminates the function in cases where an invalid value is detected. Thanks.