loop0: detected capacity change from 0 to 64 hfs: unable to locate alternate MDB hfs: continuing without an alternate MDB ------------[ cut here ]------------ kernel BUG at fs/hfs/inode.c:222! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6697 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:hfs_new_inode+0xbc4/0xbd0 fs/hfs/inode.c:222 Code: 89 f1 80 e1 07 fe c1 38 c1 0f 8c 15 fa ff ff 4c 89 f7 e8 0f 6d 8b ff e9 08 fa ff ff e8 c5 b5 29 ff 90 0f 0b e8 bd b5 29 ff 90 <0f> 0b e8 b5 b5 29 ff 90 0f 0b 66 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003b37848 EFLAGS: 00010293 RAX: ffffffff829557c3 RBX: ffff88803a419748 RCX: ffff888026245a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1004f94608 R12: ffff888027ca3000 R13: 1ffff110068414f3 R14: 0000000100000000 R15: ffff88803a419748 FS: 00007f166458e6c0(0000) GS:ffff888126bc2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31463fff CR3: 000000003ad7a000 CR4: 00000000003526f0 Call Trace: hfs_create+0x2a/0xe0 fs/hfs/dir.c:198 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x1500/0x3840 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1664f1efc9 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:00007f166458e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f1665175fa0 RCX: 00007f1664f1efc9 RDX: 0000000000000042 RSI: 00002000000002c0 RDI: ffffffffffffff9c RBP: 00007f1664fa1f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000058 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1665176038 R14: 00007f1665175fa0 R15: 00007ffeb72a90b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:hfs_new_inode+0xbc4/0xbd0 fs/hfs/inode.c:222 Code: 89 f1 80 e1 07 fe c1 38 c1 0f 8c 15 fa ff ff 4c 89 f7 e8 0f 6d 8b ff e9 08 fa ff ff e8 c5 b5 29 ff 90 0f 0b e8 bd b5 29 ff 90 <0f> 0b e8 b5 b5 29 ff 90 0f 0b 66 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003b37848 EFLAGS: 00010293 RAX: ffffffff829557c3 RBX: ffff88803a419748 RCX: ffff888026245a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1004f94608 R12: ffff888027ca3000 R13: 1ffff110068414f3 R14: 0000000100000000 R15: ffff88803a419748 FS: 00007f166458e6c0(0000) GS:ffff888126bc2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31463fff CR3: 000000003ad7a000 CR4: 00000000003526f0