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AJvYcCVEWHejuE9XHUd8Gh4VR7tXkN6Z6Malh0+Hz1hb4mJOpbtJ5kkZe6PgRhOcv1GW8p7leRXn2YHGxv4FgR4UYg==@vger.kernel.org X-Gm-Message-State: AOJu0YzMfZBs49iWx6vduIPu6QyV+vNBIAwNO7Rl7auBR7JXZzJp4/zJ 60oZTYwHFdRyKz7BjR1Oersv4otUSRABzFnZcw6X5TjTB9HUkDexirKan0hxqQusbuIKb1etZ3q 4cizIS01Em1jT3S7T6WvZ9iXqcstetuga2KHb6ye4rqMCa2nVZIgICCg= X-Google-Smtp-Source: AGHT+IEeM7Xdo3aXQnKZvPp9KJctY4UnXNoVObnXe8akTQMzAgghX9EM4hQkFEhbm7X1twlsHPsp0rRwej8gswt/w2pDCnynjHsV Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1448:b0:3a0:8c5f:90d8 with SMTP id e9e14a558f8ab-3a26d732381mr48110885ab.6.1727323346613; Wed, 25 Sep 2024 21:02:26 -0700 (PDT) Date: Wed, 25 Sep 2024 21:02:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66f4dcd2.050a0220.211276.003a.GAE@google.com> Subject: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in bch2_stripe_to_text From: syzbot To: 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: 1ec6d097897a Merge tag 's390-6.12-1' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14c0b080580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6265dd30e362bb47 dashboard link: https://syzkaller.appspot.com/bug?extid=f8c98a50c323635be65d 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=12e58e07980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12c0b080580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-1ec6d097.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0b74fa2b2b4e/vmlinux-1ec6d097.xz kernel image: https://storage.googleapis.com/syzbot-assets/1ed852a3c5d1/bzImage-1ec6d097.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/19c2305bd0ee/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f8c98a50c323635be65d@syzkaller.appspotmail.com bcachefs (loop0): Doing compatible version upgrade from 1.7: mi_btree_bitmap to 1.12: rebalance_work_acct_fix running recovery passes: check_allocations ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in fs/bcachefs/ec.c:147:2 shift exponent 108 is too large for 32-bit type 'unsigned int' CPU: 0 UID: 0 PID: 5088 Comm: syz-executor278 Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 bch2_stripe_to_text+0x899/0x8c0 fs/bcachefs/ec.c:147 __bch2_bkey_fsck_err+0x11f/0x230 fs/bcachefs/error.c:429 bch2_stripe_validate+0x3ca/0x630 fs/bcachefs/ec.c:116 bch2_btree_node_read_done+0x3dc6/0x5d60 fs/bcachefs/btree_io.c:1219 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323 bch2_btree_node_read+0x2433/0x2a10 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline] bch2_btree_root_read+0x626/0x980 fs/bcachefs/btree_io.c:1773 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523 bch2_fs_recovery+0x24ac/0x38b0 fs/bcachefs/recovery.c:851 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036 bch2_fs_get_tree+0xd61/0x1700 fs/bcachefs/fs.c:1956 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 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: 0033:0x7fbcc7b8a8fa 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:00007ffc0febe3f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc0febe410 RCX: 00007fbcc7b8a8fa RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007ffc0febe410 RBP: 0000000000000004 R08: 00007ffc0febe450 R09: 0000000000005d9a R10: 0000000000200400 R11: 0000000000000282 R12: 0000000000200400 R13: 00007ffc0febe450 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. 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