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Wed, 05 Feb 2025 07:20:03 -0800 (PST) Date: Wed, 05 Feb 2025 07:20:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67a381a3.050a0220.50516.0077.GAE@google.com> Subject: Re: [syzbot] [hardening?] [mm?] BUG: bad usercopy in vfs_readlink From: syzbot To: akpm@linux-foundation.org, brauner@kernel.org, gustavoars@kernel.org, kees@kernel.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mjguzik@gmail.com, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: BBDA040014 X-Stat-Signature: 45k7goca1q36cyo6tyuc3jicap5y7xfj X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1738768804-858838 X-HE-Meta: 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 EoC6MheE 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 1hREs478 zwxJkpn2J6y5SYR37yawxFc7y280eT1+s3i83xkjP2KLYWwGgq9Mi0YswxQx/11a5XDgArbBIGfuHm0Ed1WV6sbm21CUToSbKC2Eh7cQKOg0Q//mZPqS3SM5ByGFcfcU X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-by: syzbot+48a99e426f29859818c0@syzkaller.appspotmail.com Tested-by: syzbot+48a99e426f29859818c0@syzkaller.appspotmail.com Tested on: commit: 5c8c2292 Merge tag 'kthreads-fixes-2025-02-04' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=108993df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=207eb10d2de1b054 dashboard link: https://syzkaller.appspot.com/bug?extid=48a99e426f29859818c0 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=112ecdf8580000 Note: testing is done by a robot and is best-effort only.