sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in;
   program syz-executor.2 not setting count and/or reply_len properly
loop1: detected capacity change from 0 to 1024
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4038 at lib/iov_iter.c:629 _copy_from_iter+0x2f1/0x1130
Modules linked in:
CPU: 0 PID: 4038 Comm: syz-executor.2 Not tainted 6.1.0-rc7-next-20221202 #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 5a 16 37 ff be 79 02 00 00 48 c7 c7 40 bd 9e 84 e8 b9 94 5a ff e9 13 fe ff ff e8 3f 16 37 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 30 16 37 ff 31 ff 89 ee e8 f7 11
RSP: 0018:ffff88804735f5e8 EFLAGS: 00010216
RAX: 00000000000013f6 RBX: 0000000000000000 RCX: ffffc90012067000
RDX: 0000000000040000 RSI: ffffffff8211fe11 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000390
R13: ffffea00011cb400 R14: 0000000000000390 R15: ffff88804735f818
FS:  00007fb8b5ace700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1a7cb7000 CR3: 0000000021c62000 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: 0033:0x7fb8b8558b19
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:00007fb8b5ace188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb8b866bf60 RCX: 00007fb8b8558b19
RDX: 000000000000002b RSI: 0000000020000380 RDI: 0000000000000009
RBP: 00007fb8b85b2f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff78710f1f R14: 00007fb8b5ace300 R15: 0000000000022000
 </TASK>
irq event stamp: 7355
hardirqs last  enabled at (7401): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (7452): [<ffffffff843f2bbf>] sysvec_apic_timer_interrupt+0xf/0xc0
softirqs last  enabled at (2878): [<ffffffff811834db>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2621): [<ffffffff811834db>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
FAT-fs (loop1): invalid media value (0x6b)
FAT-fs (loop1): Can't find a valid FAT filesystem
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
loop1: detected capacity change from 0 to 1024
FAT-fs (loop1): invalid media value (0x6b)
FAT-fs (loop1): Can't find a valid FAT filesystem
loop5: detected capacity change from 0 to 1024
FAT-fs (loop5): invalid media value (0x6b)
FAT-fs (loop5): Can't find a valid FAT filesystem
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
loop1: detected capacity change from 0 to 1024
FAT-fs (loop1): invalid media value (0x6b)
FAT-fs (loop1): Can't find a valid FAT filesystem
sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in;
   program syz-executor.2 not setting count and/or reply_len properly
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
syz-executor.4: attempt to access beyond end of device
loop4: rw=2049, sector=124, nr_sectors = 4 limit=40
buffer_io_error: 135 callbacks suppressed
Buffer I/O error on dev loop4, logical block 31, lost async page write
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'.