EXT4-fs (loop3): dirty_blocks=16 EXT4-fs (loop3): Block reservation details EXT4-fs (loop3): i_reserved_data_blocks=1 ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2794! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9525 Comm: kworker/u4:7 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-7:3) RIP: 0010:ext4_writepages+0x2d31/0x37f0 fs/ext4/inode.c:2794 Code: 00 fc ff df 44 89 64 24 18 48 c1 ea 03 80 3c 02 00 0f 84 25 da ff ff 48 8b 3c 24 e8 89 2d b8 ff e9 17 da ff ff e8 8f 50 82 ff <0f> 0b 4c 8b b4 24 20 01 00 00 e8 80 50 82 ff 0f b6 ac 24 50 02 00 RSP: 0018:ffff888040d77500 EFLAGS: 00010293 RAX: ffff888099e00300 RBX: 0000000000000001 RCX: ffffffff81e03070 RDX: 0000000000000000 RSI: ffffffff81e034e1 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff88808a9f96f0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555e56708 CR3: 00000000a5bb2000 CR4: 00000000003406f0 DR0: 0080ffff00000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __writeback_single_inode+0x10c/0x11d0 fs/fs-writeback.c:1385 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 wb_writeback+0x28d/0xcc0 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1965 [inline] wb_workfn+0x29b/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: ---[ end trace f61d90a9a0527a39 ]--- RIP: 0010:ext4_writepages+0x2d31/0x37f0 fs/ext4/inode.c:2794 Code: 00 fc ff df 44 89 64 24 18 48 c1 ea 03 80 3c 02 00 0f 84 25 da ff ff 48 8b 3c 24 e8 89 2d b8 ff e9 17 da ff ff e8 8f 50 82 ff <0f> 0b 4c 8b b4 24 20 01 00 00 e8 80 50 82 ff 0f b6 ac 24 50 02 00 RSP: 0018:ffff888040d77500 EFLAGS: 00010293 RAX: ffff888099e00300 RBX: 0000000000000001 RCX: ffffffff81e03070 RDX: 0000000000000000 RSI: ffffffff81e034e1 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff88808a9f96f0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f369435a1b8 CR3: 00000000a5bb2000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400