sg_write: data in/out 901/4 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.6 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8122 at lib/iov_iter.c:644 _copy_from_iter+0x2f1/0x1330
Modules linked in:
CPU: 1 PID: 8122 Comm: syz-executor.6 Not tainted 6.3.0-next-20230428 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2f1/0x1330
Code: 36 ff 44 89 f3 e9 2f ff ff ff e8 ea 27 36 ff be 88 02 00 00 48 c7 c7 20 da 9e 84 e8 79 1e 5a ff e9 13 fe ff ff e8 cf 27 36 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 c0 27 36 ff 31 ff 89 ee e8 f7 22
RSP: 0018:ffff888047417608 EFLAGS: 00010216
RAX: 0000000000000df6 RBX: 0000000000000000 RCX: ffffc90009e16000
RDX: 0000000000040000 RSI: ffffffff8215d5e1 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000385
R13: ffffea0001293000 R14: 0000000000000385 R15: ffff888047417838
FS:  00007f023804e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff75eb40f64 CR3: 000000004582e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 copy_page_from_iter+0xe3/0x180
 blk_rq_map_user_iov+0xb39/0x16c0
 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+0x2d8/0xdd0
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f023aad8b19
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:00007f023804e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f023abebf60 RCX: 00007f023aad8b19
RDX: 000000000000002e RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f023ab32f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0258b41f R14: 00007f023804e300 R15: 0000000000022000
 </TASK>
irq event stamp: 891
hardirqs last  enabled at (901): [<ffffffff812fea18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (912): [<ffffffff812fe9fd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (194): [<ffffffff8118e59c>] __irq_exit_rcu+0xcc/0x110
softirqs last disabled at (143): [<ffffffff8118e59c>] __irq_exit_rcu+0xcc/0x110
---[ end trace 0000000000000000 ]---
audit: type=1326 audit(1683137666.945:36): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8133 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f31b1bc5b19 code=0x0
sg_write: data in/out 901/4 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.6 not setting count and/or reply_len properly