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AJvYcCXoaoFVG3KNNcwSUSxyDv5qhle1djTx/vNAFfdRHPLBo1O54y06AdpwFTdzbJq5332gwOe0SMXvszcBgmw=@vger.kernel.org X-Gm-Message-State: AOJu0Yx0/OPGpqPUHkIL4ULkvr6tSNpjk0HAfVURVhJJhQTwULRBDLqK gXM/Kacxqf6V2dRdl+Pl2es0eUeJq1J6Z0pWcYKlGn7HlCfZgEK1MKnXyB2x9dYbvahZ+HN+B6X NTunR5F0UIyvF6gYox7T+VH/G7v4LHmZUcXa09bdP/56JCA8Y+pnuuwbINKE= X-Google-Smtp-Source: AGHT+IEeVII6Nr0rcVGr0qWvBULevzjLKnmb8lk2m6/X6rSx/Y/eF5oMsEBhzBa8B4iYZ0Gu0ho/Q99ZjfvDsj08YId7m16SL7Cy Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6830:3483:b0:73e:643f:5b29 with SMTP id 46e09a7af769-74177a4aaafmr4973749a34.3.1753943795474; Wed, 30 Jul 2025 23:36:35 -0700 (PDT) Date: Wed, 30 Jul 2025 23:36:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <688b0ef3.a00a0220.26d0e1.0038.GAE@google.com> Subject: [syzbot] [udf?] WARNING in __getblk_slow From: syzbot To: jack@suse.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ced1b9e0392d Merge tag 'ata-6.17-rc1' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=154e9782580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a6d3e67bfa86ec9a dashboard link: https://syzkaller.appspot.com/bug?extid=89fa933c2012e808890e compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11da74a2580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12af8cf0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7992028cc1d8/disk-ced1b9e0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/21e8b1538aee/vmlinux-ced1b9e0.xz kernel image: https://storage.googleapis.com/syzbot-assets/04d1cab11b26/bzImage-ced1b9e0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+89fa933c2012e808890e@syzkaller.appspotmail.com syz.1.17: attempt to access beyond end of device nbd1: rw=0, sector=64, nr_sectors = 1 limit=0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6081 at fs/buffer.c:1125 __getblk_slow+0x4cc/0x560 fs/buffer.c:1125 Modules linked in: CPU: 1 UID: 0 PID: 6081 Comm: syz.1.17 Not tainted 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__getblk_slow+0x4cc/0x560 fs/buffer.c:1125 Code: c0 8b 48 89 df e8 04 43 bc ff 90 0f 0b e8 4c 7f 74 ff 48 c7 c6 e0 49 c0 8b 48 89 df e8 ed 42 bc ff 90 0f 0b e8 35 7f 74 ff 90 <0f> 0b 90 8b 74 24 0c 89 ea 48 c7 c7 40 4b c0 8b 31 db e8 4d 92 53 RSP: 0018:ffffc90003a3f7f0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff824775a6 RDX: ffff88802d388000 RSI: ffffffff824779eb RDI: 0000000000000005 RBP: 0000000000000400 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000200 R11: 0000000000000001 R12: ffff8880240db980 R13: 0000000000000100 R14: 0000000000000200 R15: ffff8880240db980 FS: 00007fc5345f26c0(0000) GS:ffff8881247f9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000004a00 CR3: 00000000638a0000 CR4: 00000000003526f0 Call Trace: bdev_getblk+0xd4/0xe0 fs/buffer.c:1461 __bread_gfp+0x86/0x3c0 fs/buffer.c:1515 sb_bread include/linux/buffer_head.h:346 [inline] udf_read_tagged+0xae/0x740 fs/udf/misc.c:199 udf_check_anchor_block+0x89/0x4b0 fs/udf/super.c:1912 udf_scan_anchors fs/udf/super.c:1952 [inline] udf_load_vrs+0x3b8/0x1070 fs/udf/super.c:2033 udf_fill_super+0x791/0x1df0 fs/udf/super.c:2201 get_tree_bdev_flags+0x389/0x620 fs/super.c:1692 vfs_get_tree+0x8e/0x340 fs/super.c:1815 do_new_mount fs/namespace.c:3805 [inline] path_mount+0x1482/0x1fd0 fs/namespace.c:4120 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount fs/namespace.c:4321 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4321 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc53378e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc5345f2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc5339b5fa0 RCX: 00007fc53378e9a9 RDX: 0000200000000080 RSI: 0000200000004a00 RDI: 0000200000000000 RBP: 00007fc533810d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000014 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc5339b5fa0 R15: 00007ffcecbba4c8 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup