IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 hfs: unable to locate alternate MDB hfs: continuing without an alternate MDB ------------[ cut here ]------------ kernel BUG at fs/hfs/inode.c:441! invalid opcode: 0000 [#1] SMP CPU: 1 PID: 89 Comm: kworker/u4:2 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 hfs: unable to locate alternate MDB Workqueue: writeback wb_workfn (flush-7:4) RIP: 0010:hfs_write_inode+0x19a/0x290 fs/hfs/inode.c:441 Code: 0f 85 11 01 00 00 48 81 c4 a8 00 00 00 5b 41 5c 41 5d 5d c3 48 83 f8 03 74 28 48 83 f8 04 74 0c 48 83 f8 02 0f 84 a6 fe ff ff <0f> 0b 48 8b 43 28 48 8b 80 60 06 00 00 48 8b 78 30 e8 a0 c7 ff ff RSP: 0018:ffffc90000103b28 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888208256718 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffc90000103c80 RDI: ffff888208256718 RBP: ffffc90000103be8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 5144156bbf6c89da R12: 0000000000000000 R13: 0000000000000000 R14: ffff888208256940 R15: ffff8882082567a0 FS: 0000000000000000(0000) GS:ffff888218500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc1e08ed18 CR3: 0000000212724000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 hfs: continuing without an alternate MDB DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_inode fs/fs-writeback.c:1312 [inline] __writeback_single_inode+0x455/0x5e0 fs/fs-writeback.c:1511 writeback_sb_inodes+0x22a/0x570 fs/fs-writeback.c:1716 wb_writeback+0x10f/0x460 fs/fs-writeback.c:1892 wb_do_writeback fs/fs-writeback.c:2037 [inline] wb_workfn+0x101/0x5d0 fs/fs-writeback.c:2078 process_one_work+0x25d/0x590 kernel/workqueue.c:2269 hfs: unable to locate alternate MDB worker_thread+0x3f/0x390 kernel/workqueue.c:2415 kthread+0x149/0x160 kernel/kthread.c:291 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293 Modules linked in: ---[ end trace 2f912970b245ec2b ]--- hfs: continuing without an alternate MDB RIP: 0010:hfs_write_inode+0x19a/0x290 fs/hfs/inode.c:441 Code: 0f 85 11 01 00 00 48 81 c4 a8 00 00 00 5b 41 5c 41 5d 5d c3 48 83 f8 03 74 28 48 83 f8 04 74 0c 48 83 f8 02 0f 84 a6 fe ff ff <0f> 0b 48 8b 43 28 48 8b 80 60 06 00 00 48 8b 78 30 e8 a0 c7 ff ff hfs: unable to locate alternate MDB RSP: 0018:ffffc90000103b28 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888208256718 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffc90000103c80 RDI: ffff888208256718 RBP: ffffc90000103be8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 5144156bbf6c89da R12: 0000000000000000 R13: 0000000000000000 R14: ffff888208256940 R15: ffff8882082567a0 FS: 0000000000000000(0000) GS:ffff888218500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc1e08ed18 CR3: 0000000212724000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 hfs: continuing without an alternate MDB