Hello, syzbot found the following issue on: HEAD commit: 0bb80ecc33a8 Linux 6.6-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16abc6c7a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=df91a3034fe3f122 dashboard link: https://syzkaller.appspot.com/bug?extid=f8aee4b1409f7e8e6e46 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1d506cf29d25/disk-0bb80ecc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ca5b56af4b3e/vmlinux-0bb80ecc.xz kernel image: https://storage.googleapis.com/syzbot-assets/aa88aed611c1/bzImage-0bb80ecc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f8aee4b1409f7e8e6e46@xxxxxxxxxxxxxxxxxxxxxxxxx loop2: detected capacity change from 0 to 64 ------------[ cut here ]------------ kernel BUG at fs/hfs/btree.c:41! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 11852 Comm: syz-executor.2 Not tainted 6.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:hfs_btree_open+0xf09/0xf20 fs/hfs/btree.c:41 Code: 7e ff e9 7e fa ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 9b fa ff ff 4c 89 f7 e8 c1 ca 7e ff e9 8e fa ff ff e8 c7 df 24 ff <0f> 0b e8 c0 df 24 ff 0f 0b e8 b9 df 24 ff 0f 0b 0f 1f 80 00 00 00 RSP: 0000:ffffc900034cf738 EFLAGS: 00010283 RAX: ffffffff8268c3c9 RBX: ffff888036585ad0 RCX: 0000000000040000 RDX: ffffc9000b664000 RSI: 000000000000586c RDI: 000000000000586d RBP: 0000000000000000 R08: ffffffff8268b627 R09: 1ffff11006cb0b75 R10: dffffc0000000000 R11: ffffed1006cb0b76 R12: ffff8880210a2000 R13: ffff888028f54008 R14: ffff888028f54000 R15: dffffc0000000000 FS: 00007f73a031a6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c2a9ba000 CR3: 0000000023db4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> hfs_mdb_get+0x1443/0x21b0 fs/hfs/mdb.c:199 hfs_fill_super+0x107d/0x1790 fs/hfs/super.c:406 mount_bdev+0x237/0x300 fs/super.c:1629 legacy_get_tree+0xef/0x190 fs/fs_context.c:638 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f739f67e1ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f73a0319ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f73a0319f80 RCX: 00007f739f67e1ea RDX: 0000000020000240 RSI: 0000000020000040 RDI: 00007f73a0319f40 RBP: 0000000020000240 R08: 00007f73a0319f80 R09: 0000000000004012 R10: 0000000000004012 R11: 0000000000000202 R12: 0000000020000040 R13: 00007f73a0319f40 R14: 0000000000000285 R15: 0000000020000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:hfs_btree_open+0xf09/0xf20 fs/hfs/btree.c:41 Code: 7e ff e9 7e fa ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 9b fa ff ff 4c 89 f7 e8 c1 ca 7e ff e9 8e fa ff ff e8 c7 df 24 ff <0f> 0b e8 c0 df 24 ff 0f 0b e8 b9 df 24 ff 0f 0b 0f 1f 80 00 00 00 RSP: 0000:ffffc900034cf738 EFLAGS: 00010283 RAX: ffffffff8268c3c9 RBX: ffff888036585ad0 RCX: 0000000000040000 RDX: ffffc9000b664000 RSI: 000000000000586c RDI: 000000000000586d RBP: 0000000000000000 R08: ffffffff8268b627 R09: 1ffff11006cb0b75 R10: dffffc0000000000 R11: ffffed1006cb0b76 R12: ffff8880210a2000 R13: ffff888028f54008 R14: ffff888028f54000 R15: dffffc0000000000 FS: 00007f73a031a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff38ded7086 CR3: 0000000023db4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
