------------[ cut here ]------------ WARNING: CPU: 0 PID: 19658 at fs/ext4/inode.c:5097 ext4_write_inode+0x372/0x660 fs/ext4/inode.c:5097 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 19658 Comm: xfsaild/loop2 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:ext4_write_inode+0x372/0x660 fs/ext4/inode.c:5097 Code: 02 84 c0 74 08 3c 03 0f 8e b3 02 00 00 41 8b b4 24 a8 05 00 00 4c 89 ef e8 fb af 12 00 41 89 c5 e9 cd fd ff ff e8 2e cf 6e ff <0f> 0b 45 31 ed e9 be fd ff ff e8 1f cf 6e ff 49 8d 77 a0 31 d2 4c RSP: 0018:ffffc900178a7578 EFLAGS: 00010293 RAX: ffff8880479fc340 RBX: 1ffff92002f14eb2 RCX: ffffffff8206b5e7 RDX: 0000000000000000 RSI: ffffffff8206b892 RDI: 0000000000000005 RBP: ffffc900178a7638 R08: ffff8880479fc340 R09: ffffed1015d0707c R10: ffffed1015d0707b R11: ffff8880ae8383db R12: ffff888090cd4608 R13: 0000000000000800 R14: dffffc0000000000 R15: ffffc900178a7610 write_inode fs/fs-writeback.c:1312 [inline] __writeback_single_inode+0xd67/0x1400 fs/fs-writeback.c:1511 writeback_single_inode+0x2cf/0x440 fs/fs-writeback.c:1565 sync_inode fs/fs-writeback.c:2602 [inline] sync_inode_metadata+0xa8/0xe0 fs/fs-writeback.c:2622 ext4_fsync_nojournal fs/ext4/fsync.c:94 [inline] ext4_sync_file+0x7e7/0x10f0 fs/ext4/fsync.c:172 vfs_fsync_range+0x141/0x230 fs/sync.c:197 generic_write_sync include/linux/fs.h:2867 [inline] ext4_buffered_write_iter+0x30a/0x460 fs/ext4/file.c:277 ext4_file_write_iter+0x1fe/0x14e0 fs/ext4/file.c:642 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x4d3/0x770 fs/read_write.c:483 __vfs_write+0xe1/0x110 fs/read_write.c:496 __kernel_write+0x11b/0x3b0 fs/read_write.c:515 do_acct_process+0xd3b/0x1150 kernel/acct.c:522 slow_acct_process kernel/acct.c:581 [inline] acct_process+0x559/0x60f kernel/acct.c:607 do_exit+0x1b6e/0x2f50 kernel/exit.c:791 kthread+0x2d0/0x430 kernel/kthread.c:257 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..