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AJvYcCUznsT2S/dkKb79nrCCvbBkalS77BvWhr1SntY9rLTqhiw3Wtj6jDqPuQT6064TunxtW4V3wnStRb23y04=@vger.kernel.org X-Gm-Message-State: AOJu0Yx287SVu4Cq0QGV7sp6xCxJKbLWbUzRQkiQEYbtCqxBx9T1GZXU 1E6lwbWvG9KUYTXGKbfWNxR89Vnvaw1bcabjZ6yFyMJVJryvG+jEiMQoYN6EbjjBu+a6ftD0bfd JZ2FmuYOuK886nPelAbB/BxOQidRkJfayTsHp+veJI/6PZI5YcmoeC70= X-Google-Smtp-Source: AGHT+IEQPcUNvrJLEU7d7xlJ0ZQq++hRsnZQ1POdFHrA5/4/IztvyioxlOWkApLGwBivdU2vRJ6Qydzvs9jABzdQlAmKxRQfFs21 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:b745:0:b0:3a3:b256:f31f with SMTP id e9e14a558f8ab-3a3b256f33cmr7929745ab.19.1728561449731; Thu, 10 Oct 2024 04:57:29 -0700 (PDT) Date: Thu, 10 Oct 2024 04:57:29 -0700 In-Reply-To: <66feec23.050a0220.9ec68.0059.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6707c129.050a0220.64b99.0017.GAE@google.com> Subject: Re: [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dtInsertEntry From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: d3d1556696c1 Merge tag 'mm-hotfixes-stable-2024-10-09-15-4.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1354cb27980000 kernel config: https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995 dashboard link: https://syzkaller.appspot.com/bug?extid=5f7f0caf9979e9d09ff8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f66fd0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ed005f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ea459972f07f/disk-d3d15566.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b8dcb9ab73d3/vmlinux-d3d15566.xz kernel image: https://storage.googleapis.com/syzbot-assets/686f1b595c23/bzImage-d3d15566.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/73f0c7d76431/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5f7f0caf9979e9d09ff8@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:3624:7 index -1 is out of range for type 'struct dtslot[128]' CPU: 0 UID: 0 PID: 5218 Comm: syz-executor135 Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429 dtInsertEntry+0x1735/0x1780 fs/jfs/jfs_dtree.c:3624 dtInsert+0xbc1/0x6c10 fs/jfs/jfs_dtree.c:893 jfs_create+0x7ba/0xbb0 fs/jfs/namei.c:137 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3930 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_open fs/open.c:1438 [inline] __se_sys_open fs/open.c:1434 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2b371c0639 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff164f4418 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fff164f45f8 RCX: 00007f2b371c0639 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000000 RBP: 00007f2b37239610 R08: 0000000000005d93 R09: 0000000000000000 R10: 00007fff164f42e0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff164f45e8 R14: 0000000000000001 R15: 0000000000000001 ---[ end trace ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.