EXT4-fs error (device loop1): ext4_mb_generate_buddy:1317: group 0, block bitmap and bg descriptor inconsistent: 25 vs 281 free clusters
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kernel BUG at fs/ext4/inode.c:2827!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 11265 Comm: syz.1.596 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:ext4_do_writepages+0x479b/0x47a0
Code: c6 e0 ca e4 8b e8 f5 fa 9c fe 90 0f 0b e8 bd 5d 3b ff 4c 89 f7 48 c7 c6 c0 cf e4 8b e8 de fa 9c fe 90 0f 0b e8 a6 5d 3b ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc90003c2ef60 EFLAGS: 00010287
RAX: ffffffff828b13da RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc90022414000 RSI: 0000000000000416 RDI: 0000000000000417
RBP: ffffc90003c2f370 R08: ffff8881131f54b7 R09: 1ffff1102263ea96
R10: dffffc0000000000 R11: ffffed102263ea97 R12: ffffc90003c2f5e0
R13: 1ffff92000785ebc R14: 0000004000000000 R15: 0000000000000001
FS:  00007ff60f5176c0(0000) GS:ffff88818dc26000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b692941d0 CR3: 000000016a126000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0
 do_writepages+0x338/0x560
 filemap_write_and_wait_range+0x335/0x3f0
 ext4_fileattr_set+0x6be/0x16e0
 vfs_fileattr_set+0x9f5/0xc90
 ioctl_fssetxattr+0x349/0x3b0
 do_vfs_ioctl+0x901/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff60e59ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff60f517028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff60e815fa0 RCX: 00007ff60e59ce59
RDX: 0000200000000080 RSI: 00000000401c5820 RDI: 0000000000000007
RBP: 00007ff60e632e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff60e816038 R14: 00007ff60e815fa0 R15: 00007ffcd1bd16c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x479b/0x47a0
Code: c6 e0 ca e4 8b e8 f5 fa 9c fe 90 0f 0b e8 bd 5d 3b ff 4c 89 f7 48 c7 c6 c0 cf e4 8b e8 de fa 9c fe 90 0f 0b e8 a6 5d 3b ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc90003c2ef60 EFLAGS: 00010287
RAX: ffffffff828b13da RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc90022414000 RSI: 0000000000000416 RDI: 0000000000000417
RBP: ffffc90003c2f370 R08: ffff8881131f54b7 R09: 1ffff1102263ea96
R10: dffffc0000000000 R11: ffffed102263ea97 R12: ffffc90003c2f5e0
R13: 1ffff92000785ebc R14: 0000004000000000 R15: 0000000000000001
FS:  00007ff60f5176c0(0000) GS:ffff88818dc26000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb7f70a440 CR3: 000000016a126000 CR4: 00000000000006f0
