syzbot

EXT4-fs (loop0): This should not happen!! Data will be lost
EXT4-fs (loop0): Total free blocks count 0
EXT4-fs (loop0): Free/Dirty block details
EXT4-fs (loop0): free_blocks=2415919104
EXT4-fs (loop0): dirty_blocks=16
EXT4-fs (loop0): Block reservation details
EXT4-fs (loop0): i_reserved_data_blocks=1
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2766!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 294 Comm: syz-executor287 Not tainted 5.10.210-syzkaller-00394-g70b6ab09a34b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ext4_writepages+0x3bdf/0x3c00 fs/ext4/inode.c:2765
Code: 63 8c ff 31 ff 89 de e8 ff 62 8c ff 45 84 f6 75 27 e8 65 60 8c ff 49 be 00 00 00 00 00 fc ff df e9 0e f7 ff ff e8 51 60 8c ff <0f> 0b e8 4a 60 8c ff e8 a1 35 22 ff eb 9b e8 3e 60 8c ff e8 95 35
RSP: 0018:ffffc90000bf7420 EFLAGS: 00010293
RAX: ffffffff81de49af RBX: 0000008000000000 RCX: ffff88811e8c93c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000bf7810 R08: ffffffff81de1423 R09: ffffed102391e82a
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffffc90000bf7980 R14: 000000c410000000 R15: ffffc90000bf76e0
FS:  00007f3a69d686c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000011e3b0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_writepages+0x12e/0x270 mm/page-writeback.c:2358
 __filemap_fdatawrite_range+0x33c/0x3f0 mm/filemap.c:427
 filemap_write_and_wait_range+0x64/0xe0 mm/filemap.c:660
 filemap_write_and_wait include/linux/fs.h:2778 [inline]
 iomap_bmap+0xc0/0x1f0 fs/iomap/fiemap.c:130
 ext4_bmap+0x2ea/0x430 fs/ext4/inode.c:3309
 bmap+0xa5/0xe0 fs/inode.c:1748
 ioctl_fibmap fs/ioctl.c:74 [inline]
 file_ioctl fs/ioctl.c:531 [inline]
 do_vfs_ioctl+0x156f/0x1a30 fs/ioctl.c:732
 __do_sys_ioctl fs/ioctl.c:751 [inline]
 __se_sys_ioctl+0x99/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f3a69dcb1a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3a69d68218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3a69e52618 RCX: 00007f3a69dcb1a9
RDX: 0000000020000080 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007f3a69e52610 R08: 00007fffbafe8ce7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3a69e1f7e8
R13: 0030656c69662f2e R14: 00746e6572727563 R15: 7275632e73646970
Modules linked in:
---[ end trace 5db0eed95efc0796 ]---
RIP: 0010:ext4_writepages+0x3bdf/0x3c00 fs/ext4/inode.c:2765
Code: 63 8c ff 31 ff 89 de e8 ff 62 8c ff 45 84 f6 75 27 e8 65 60 8c ff 49 be 00 00 00 00 00 fc ff df e9 0e f7 ff ff e8 51 60 8c ff <0f> 0b e8 4a 60 8c ff e8 a1 35 22 ff eb 9b e8 3e 60 8c ff e8 95 35
RSP: 0018:ffffc90000bf7420 EFLAGS: 00010293
RAX: ffffffff81de49af RBX: 0000008000000000 RCX: ffff88811e8c93c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000bf7810 R08: ffffffff81de1423 R09: ffffed102391e82a
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffffc90000bf7980 R14: 000000c410000000 R15: ffffc90000bf76e0
FS:  00007f3a69d686c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000011e3b0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400