------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2462! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 2128 Comm: kworker/u4:2 Not tainted 4.4.164+ #123 Workqueue: writeback wb_workfn (flush-8:0) task: ffff8800b8258000 task.stack: ffff8800a70c0000 RIP: 0010:[] [] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462 RSP: 0018:ffff8800a70c7330 EFLAGS: 00010293 RAX: ffff8800b8258000 RBX: ffffea0006bad3c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81640b90 RDI: ffffea0006bad3d0 RBP: ffff8800a70c74e8 R08: ffff8800b82588c8 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff831a2c38 R12: 0000000000000008 R13: 0000000000000120 R14: dffffc0000000000 R15: ffff8800a70c7630 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001fba978 CR3: 00000000aaab0000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 1ffff10014e18e74 ffff8800a70c73c0 ffff8800a70c7638 ffff8800a70c7640 00000000b825893a ffffffffffffffff ffff8801ce92bba0 0000000e0000000c 0000000000001ae0 ffff8800a70c7400 ffff8800a70c7648 ffffed0014e18ec7 Call Trace: [] ext4_writepages+0xd4c/0x2c20 fs/ext4/inode.c:2617 [] do_writepages+0xef/0x1d0 mm/page-writeback.c:2334 [] __writeback_single_inode+0x101/0x1340 fs/fs-writeback.c:1285 [] writeback_sb_inodes+0x4ab/0xee0 fs/fs-writeback.c:1548 [] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1617 [] wb_writeback+0x529/0xd00 fs/fs-writeback.c:1726 [] wb_check_old_data_flush fs/fs-writeback.c:1841 [inline] [] wb_do_writeback fs/fs-writeback.c:1865 [inline] [] wb_workfn+0x966/0x1010 fs/fs-writeback.c:1894 [] process_one_work+0x824/0x1730 kernel/workqueue.c:2064 [] worker_thread+0xd9/0x1060 kernel/workqueue.c:2196 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Code: 48 89 df e8 83 44 d7 ff e9 32 ff ff ff e8 89 67 cc ff 48 89 df e8 11 5e d7 ff e9 fa fd ff ff e8 77 67 cc ff 0f 0b e8 70 67 cc ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 61 67 cc ff 8b 85 18 ff ff ff RIP [] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462 RSP ---[ end trace 75a7a47d4c57c442 ]---