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AJvYcCXxcgpEkpW8Z2HUcxbPmB5GfVJGyr3GYKFiiFuP8Ged/BsZPuQ8q1MlgfVrcy7D2c7rM0exp4Ra8IhGyed/+Tdr8bcOwNu9zAqTrB+d X-Gm-Message-State: AOJu0YwrPbWNQfZB+V4jFoVxpI1bqwywD3Pm9I0git1AQRkBLbsqOr+y Idw+rnHthVUu4yVNRDNB5aWN+YWnu8GU3Z+8sdLA7OCTUAehk50vu6y3JQMIeFGfZWY4ViTamd9 eNbVdnB992k0qIf8J46z/oUMFkBgsmKW2x5fdcMEMlpqq1gforcqOMc8= X-Google-Smtp-Source: AGHT+IHlE7LVzAW3RsUeVHqIZ0qSn+eH++WU1uD97Wi3J9INxjWyaSgSR1m8nYkrFV6eioFLo/H805lpgzqGGPAr+GrTioa0vAGc Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:48f:b0:7de:e172:3d4e with SMTP id ca18e2360f4ac-7e1b5208481mr66921939f.3.1715679211020; Tue, 14 May 2024 02:33:31 -0700 (PDT) Date: Tue, 14 May 2024 02:33:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ebf2e0061866b102@google.com> Subject: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in bch2_sb_dev_has_data From: syzbot To: bfoster@redhat.com, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, 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: cf87f46fd34d Merge tag 'drm-fixes-2024-05-11' of https://g.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=162f8fbc980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d7ea7de0cb32587 dashboard link: https://syzkaller.appspot.com/bug?extid=249018ea545364f78d04 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=13a40d04980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=102e5b70980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9c147953fc8e/disk-cf87f46f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a55c9d1f91fc/vmlinux-cf87f46f.xz kernel image: https://storage.googleapis.com/syzbot-assets/f8dab47ae8c2/bzImage-cf87f46f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/2c5c030a256e/mount_0.gz The issue was bisected to: commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b Author: Kent Overstreet Date: Sat Sep 23 22:41:51 2023 +0000 bcachefs: Ignore unknown mount options bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d673d4980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=103673d4980000 console output: https://syzkaller.appspot.com/x/log.txt?x=17d673d4980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+249018ea545364f78d04@syzkaller.appspotmail.com Fixes: 03ef80b469d5 ("bcachefs: Ignore unknown mount options") loop0: detected capacity change from 0 to 32768 ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in fs/bcachefs/replicas.c:1010:20 shift exponent 155 is too large for 32-bit type 'int' CPU: 0 PID: 5075 Comm: syz-executor397 Not tainted 6.9.0-rc7-syzkaller-00183-gcf87f46fd34d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 bch2_sb_dev_has_data+0x22a/0x5f0 fs/bcachefs/replicas.c:1010 member_to_text+0xcb/0x1030 fs/bcachefs/sb-members.c:163 bch2_sb_members_v1_to_text+0x1aa/0x2f0 fs/bcachefs/sb-members.c:317 bch2_sb_field_validate+0x1f7/0x2d0 fs/bcachefs/super-io.c:1228 bch2_sb_validate+0x9b6/0xe10 fs/bcachefs/super-io.c:460 __bch2_read_super+0xc9a/0x1460 fs/bcachefs/super-io.c:822 bch2_fs_open+0x246/0xdf0 fs/bcachefs/super.c:2052 bch2_mount+0x71d/0x1320 fs/bcachefs/fs.c:1903 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f16b990d8ba Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffdd930ef68 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffdd930ef80 RCX: 00007f16b990d8ba RDX: 0000000020011a00 RSI: 0000000020011a40 RDI: 00007ffdd930ef80 RBP: 0000000000000004 R08: 00007ffdd930efc0 R09: 00000000000119f3 R10: 0000000001200014 R11: 0000000000000282 R12: 0000000001200014 R13: 00007ffdd930efc0 R14: 0000000000000003 R15: 0000000001000000 ---[ end trace ]--- --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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