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[82.31.203.200]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38bf32222ebsm23999f8f.40.2025.01.16.06.30.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Jan 2025 06:30:39 -0800 (PST) Message-ID: Date: Thu, 16 Jan 2025 14:30:38 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Bug: slab-out-of-bounds Write in __bh_read To: Kun Hu , Andreas Gruenbacher Cc: "jjtan24@m.fudan.edu.cn" , viro@zeniv.linux.org.uk, brauner@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, gfs2@lists.linux.dev References: <5757218E-52F8-49C7-95F1-9051EB51A2F3@m.fudan.edu.cn> <6yd5s7fxnr7wtmluqa667lok54sphgtg4eppubntulelwidvca@ffyohkeovnyn> <31A10938-C36E-40A2-8A1D-180BD95528DD@m.fudan.edu.cn> <86F5589E-BC3A-49E5-824F-0E840F75F46D@m.fudan.edu.cn> <27DB604A-8C3B-4703-BB8A-CBC16B9C4969@m.fudan.edu.cn> <31f0da2e-4dd7-44eb-95ee-6d22d310a2d6@redhat.com> Content-Language: en-US From: Andrew Price In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 16/01/2025 10:41, Kun Hu wrote: > >> 2025年1月15日 02:05，Andreas Gruenbacher 写道： >> I've posted a fix and pushed it to for-next: >> >> https://lore.kernel.org/gfs2/20250114175949.1196275-1-agruenba@redhat.com/ >> >> Thanks for reporting! >> >> Andreas > >> Syzlang reproducer: https://drive.google.com/file/d/1R9QDUP2r7MI4kYMiT_yn-tzm6NqmcEW-/view?usp=sharing > > Hi Andreas, > > Thank you for the patch. I tested it using the syscall reproducer and was still able to reproduce the issue. > > Crash log: Link: https://github.com/pghk13/Kernel-Bug/blob/main/0103_6.13rc5_%E6%9C%AA%E6%8A%A5%E5%91%8A/%E5%AE%8C%E5%85%A8%E6%97%A0%E8%AE%B0%E5%BD%95/32-KASAN_%20slab-out-of-bounds%20Write%20in%20__bh_read/crashlog_0116_rc7%2Bpatch.txt > That's not the slab-out-of-bounds failure. It's failing to mount with: "kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory." This can happen when a gfs2 fs is mounted with the same locktable twice, so I expect it's a problem in the test. Please make sure you're running the same reproducer from the original report, in the same way. The patch fixes both reproducers for me. Andy