------------[ cut here ]------------
WARNING: CPU: 0 PID: 7545 at lib/iov_iter.c:629 _copy_from_iter+0x2f1/0x1130
Modules linked in:
CPU: 0 PID: 7545 Comm: syz-executor.1 Not tainted 6.1.0-rc7-next-20221129 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2f1/0x1130
Code: 37 ff 44 89 f3 e9 2f ff ff ff e8 4a 71 37 ff be 79 02 00 00 48 c7 c7 80 b5 9e 84 e8 79 e0 5a ff e9 13 fe ff ff e8 2f 71 37 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 20 71 37 ff 31 ff 89 ee e8 e7 6c
RSP: 0018:ffff8880449b75e8 EFLAGS: 00010202
RAX: 0000000000006ce0 RBX: 0000000000000000 RCX: ffffc90000bfd000
RDX: 0000000000040000 RSI: ffffffff8211a7c1 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000
R13: ffffea000111ae00 R14: 0000000000001000 R15: ffff8880449b7818
FS:  00007f5b55b7f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4bf0b2d570 CR3: 00000000423fc000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 copy_page_from_iter+0xe3/0x180
 blk_rq_map_user_iov+0xb0c/0x1650
 blk_rq_map_user_io+0x1ee/0x220
 sg_common_write.constprop.0+0xd84/0x15e0
 sg_write.part.0+0x706/0xb20
 sg_write+0x88/0xe0
 vfs_write+0x358/0xe40
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f5b58609b19
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:00007f5b55b7f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5b5871cf60 RCX: 00007f5b58609b19
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 00007f5b58663f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdca40ad4f R14: 00007f5b55b7f300 R15: 0000000000022000
 </TASK>
irq event stamp: 12727
hardirqs last  enabled at (12785): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (12844): [<ffffffff843ee3ef>] sysvec_apic_timer_interrupt+0xf/0xc0
softirqs last  enabled at (10026): [<ffffffff8118333b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (9709): [<ffffffff8118333b>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.1 not setting count and/or reply_len properly
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): bogus number of reserved sectors
FAT-fs (loop1): Can't find a valid FAT filesystem
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)