------------[ cut here ]------------
WARNING: CPU: 1 PID: 27216 at fs/ext4/inode.c:348 ext4_da_update_reserve_space+0x622/0x7d0 fs/ext4/inode.c:344
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 27216 Comm: syz-executor.1 Not tainted 5.6.0-rc7-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+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 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+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:ext4_da_update_reserve_space+0x622/0x7d0 fs/ext4/inode.c:348
Code: 02 00 0f 85 94 01 00 00 48 8b 7d 28 49 c7 c0 20 72 3c 88 41 56 48 c7 c1 80 60 3c 88 53 ba 58 01 00 00 4c 89 c6 e8 1e 6d 0d 00 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04
RSP: 0018:ffffc90001e47198 EFLAGS: 00010296
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90005f42000
RDX: 000000000001ba69 RSI: ffffffff820bf066 RDI: fffff520003c8e03
RBP: ffff888047b66648 R08: 0000000000000091 R09: ffffed1015ce6659
R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: 0000000000000001
R13: ffff888047b66b10 R14: 0000000000000000 R15: ffff888047b66bc0
 ext4_ext_map_blocks+0x24aa/0x37d0 fs/ext4/extents.c:4500
 ext4_map_blocks+0x4cb/0x1650 fs/ext4/inode.c:622
 mpage_map_one_extent fs/ext4/inode.c:2365 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2418 [inline]
 ext4_writepages+0x19eb/0x3080 fs/ext4/inode.c:2772
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x2aa/0x390 mm/filemap.c:421
 file_write_and_wait_range+0x172/0x200 mm/filemap.c:760
 ext4_sync_file+0x46b/0x10d0 fs/ext4/fsync.c:153
 vfs_fsync_range+0x138/0x220 fs/sync.c:197
 generic_write_sync include/linux/fs.h:2868 [inline]
 ext4_buffered_write_iter+0x2fd/0x450 fs/ext4/file.c:277
 ext4_file_write_iter+0x1ec/0x13f0 fs/ext4/file.c:642
 call_write_iter include/linux/fs.h:1902 [inline]
 do_iter_readv_writev+0x59c/0x840 fs/read_write.c:693
 do_iter_write fs/read_write.c:998 [inline]
 do_iter_write+0x185/0x600 fs/read_write.c:979
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1071
 do_writev+0x133/0x2f0 fs/read_write.c:1114
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1155df4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f1155df56d4 RCX: 000000000045c849
RDX: 0000000000000007 RSI: 00000000200006c0 RDI: 0000000000000003
RBP: 000000000076c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000d12 R14: 00000000004cb1d9 R15: 000000000076c0ec
Kernel Offset: disabled
Rebooting in 86400 seconds..