------------[ cut here ]------------
WARNING: CPU: 1 PID: 4330 at lib/iov_iter.c:629 _copy_from_iter+0x2b2/0x1140
Modules linked in:
CPU: 1 PID: 4330 Comm: syz-executor.5 Not tainted 6.2.0-rc5-next-20230125 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2b2/0x1140
Code: 5d 41 5e 41 5f e9 c2 09 33 02 e8 29 76 35 ff be 79 02 00 00 48 c7 c7 40 e4 9e 84 e8 f8 5c 59 ff e9 51 fe ff ff e8 0e 76 35 ff <0f> 0b 45 31 f6 eb 87 e8 02 76 35 ff 31 ff 89 ee e8 b9 71 35 ff 40
RSP: 0018:ffff888042067608 EFLAGS: 00010212
RAX: 0000000000003ce6 RBX: 0000000000000000 RCX: ffffc90006e12000
RDX: 0000000000040000 RSI: ffffffff82165ae2 RDI: 0000000000000001
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888042067838 R14: 0000000000001000 R15: ffff888042067838
FS:  00007ff2c6cb7700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb0bbd803a4 CR3: 000000000c8ce000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 copy_page_from_iter+0x251/0x430
 blk_rq_map_user_iov+0xb41/0x16c0
 blk_rq_map_user_io+0x1d1/0x200
 sg_common_write.constprop.0+0xd8d/0x15f0
 sg_write.part.0+0x698/0xac0
 sg_write+0x8d/0xe0
 vfs_write+0x2cf/0xdd0
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff2c9783b19
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:00007ff2c6cb7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff2c98970e0 RCX: 00007ff2c9783b19
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 00007ff2c97ddf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5d1c546f R14: 00007ff2c6cb7300 R15: 0000000000022000
 </TASK>
irq event stamp: 1279
hardirqs last  enabled at (1291): [<ffffffff812fdd98>] __up_console_sem+0x78/0x80
hardirqs last disabled at (1300): [<ffffffff812fdd7d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (1242): [<ffffffff81190aef>] irq_exit_rcu+0x11f/0x190
softirqs last disabled at (1141): [<ffffffff81190aef>] irq_exit_rcu+0x11f/0x190
---[ end trace 0000000000000000 ]---
9pnet_fd: Insufficient options for proto=fd
EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.
cgroup: Name too long
cgroup: Name too long
loop1: detected capacity change from 0 to 40
loop3: detected capacity change from 0 to 1024
ext4: Unknown parameter ''
loop3: detected capacity change from 0 to 1024
ext4: Unknown parameter ''
sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.5 not setting count and/or reply_len properly