------------[ cut here ]------------
WARNING: CPU: 0 PID: 16879 at fs/ext4/file.c:611 ext4_file_write_iter+0xe2a/0x19b0
Modules linked in:
CPU: 0 PID: 16879 Comm: syz-executor.4 Not tainted 6.5.0-rc2-next-20230719 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:ext4_file_write_iter+0xe2a/0x19b0
Code: 02 84 c0 74 08 3c 03 0f 8e 81 0b 00 00 41 8b 5f 20 31 ff 83 e3 08 89 de e8 83 d4 9b ff 85 db 0f 85 ef fc ff ff e8 d6 d8 9b ff <0f> 0b e9 e3 fc ff ff e8 ca d8 9b ff 48 8b 54 24 70 48 b8 00 00 00
RSP: 0018:ffff888034867c28 EFLAGS: 00010216
RAX: 0000000000001ade RBX: 0000000000000000 RCX: ffffc900073b5000
RDX: 0000000000040000 RSI: ffffffff81b0c39a RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: fffffffffffffff5
R13: ffff88800c158e70 R14: ffff888034867db0 R15: ffff888034867e00
FS:  00007fa696ef4700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c829000 CR3: 0000000030870000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 vfs_write+0x97d/0xda0
 ksys_write+0x122/0x250
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7fa69999fb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa696ef4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa699ab3020 RCX: 00007fa69999fb19
RDX: 0000000000140000 RSI: 0000000020000200 RDI: 0000000000000006
RBP: 00007fa6999f9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3e1304af R14: 00007fa696ef4300 R15: 0000000000022000
 </TASK>
irq event stamp: 1169
hardirqs last  enabled at (1179): [<ffffffff81304288>] __up_console_sem+0x78/0x80
hardirqs last disabled at (1190): [<ffffffff8130426d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (732): [<ffffffff81190143>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (717): [<ffffffff81190143>] irq_exit_rcu+0x93/0xc0
---[ end trace 0000000000000000 ]---
loop5: detected capacity change from 0 to 39
syz-executor.2: attempt to access beyond end of device
loop2: rw=2049, sector=40, nr_sectors = 4 limit=39
Buffer I/O error on dev loop2, logical block 10, lost async page write
loop2: detected capacity change from 0 to 39
loop5: detected capacity change from 0 to 39
FAT-fs (loop5): Unrecognized mount option "ÿÿ" or missing value
syz-executor.2: attempt to access beyond end of device
loop2: rw=2049, sector=40, nr_sectors = 4 limit=39
Buffer I/O error on dev loop2, logical block 10, lost async page write
loop5: detected capacity change from 0 to 39
FAT-fs (loop5): Unrecognized mount option "ÿÿ" or missing value