------------[ cut here ]------------ kernel BUG at fs/hfs/inode.c:441! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 576 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: writeback wb_workfn (flush-7:4) RIP: 0010:hfs_write_inode+0x4f2/0x930 fs/hfs/inode.c:441 Code: ae 7d 88 4c 89 ef e8 ed f7 63 ff 49 83 fd 03 0f 84 95 00 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 ed fb ff ff e8 1e f6 63 ff <0f> 0b e8 17 f6 63 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff8880b474f750 EFLAGS: 00010293 RAX: ffff8880b46642c0 RBX: 1ffff110168e9eec RCX: ffffffff81fe8f33 RDX: 0000000000000000 RSI: ffffffff81fe8f52 RDI: 0000000000000007 RBP: ffff88804410cc80 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff887dcd20 R15: ffff88804410cca8 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555654d708 CR3: 0000000095b02000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_inode fs/fs-writeback.c:1244 [inline] __writeback_single_inode+0x733/0x11d0 fs/fs-writeback.c:1442 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716 wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822 wb_check_start_all fs/fs-writeback.c:1946 [inline] wb_do_writeback fs/fs-writeback.c:1972 [inline] wb_workfn+0xbf4/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ISO 9660 Extensions: ubi0: attaching mtd0 ubi0: scanning is finished Buffer I/O error on dev loop3p4, logical block 0, async page read ---[ end trace 2b49af7a044dbe6c ]--- RIP: 0010:hfs_write_inode+0x4f2/0x930 fs/hfs/inode.c:441 ubi0: empty MTD device detected Code: ae 7d 88 4c 89 ef e8 ed f7 63 ff 49 83 fd 03 0f 84 95 00 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 ed fb ff ff e8 1e f6 63 ff <0f> 0b e8 17 f6 63 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff8880b474f750 EFLAGS: 00010293 RAX: ffff8880b46642c0 RBX: 1ffff110168e9eec RCX: ffffffff81fe8f33 RDX: 0000000000000000 RSI: ffffffff81fe8f52 RDI: 0000000000000007 RBP: ffff88804410cc80 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000 ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) R13: 0000000000000000 R14: ffffffff887dcd20 R15: ffff88804410cca8 ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 ubi0: VID header offset: 64 (aligned 64), data offset: 128 CR2: 00007ffda0b3d9c0 CR3: 00000000a9506000 CR4: 00000000003406f0 DR0: 0080ffff00000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 00000000000d0602