loop4: detected capacity change from 0 to 336
sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.3 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5518 at lib/iov_iter.c:629 _copy_from_iter+0x2b2/0x1140
Modules linked in:
CPU: 0 PID: 5518 Comm: syz-executor.3 Not tainted 6.2.0-rc6-next-20230203 #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 92 f4 32 02 e8 89 38 36 ff be 79 02 00 00 48 c7 c7 40 c5 9e 84 e8 68 f0 59 ff e9 51 fe ff ff e8 6e 38 36 ff <0f> 0b 45 31 f6 eb 87 e8 62 38 36 ff 31 ff 89 ee e8 c9 33 36 ff 40
RSP: 0018:ffff8880450ef608 EFLAGS: 00010212
RAX: 0000000000007d92 RBX: 0000000000000000 RCX: ffffc900011d6000
RDX: 0000000000040000 RSI: ffffffff82152652 RDI: 0000000000000001
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff8880450ef838 R14: 0000000000001000 R15: ffff8880450ef838
FS:  00007f4d07c72700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2be25000 CR3: 000000000f050000 CR4: 0000000000350ef0
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/0xdc0
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f4d0a6fcb19
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:00007f4d07c72188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4d0a80ff60 RCX: 00007f4d0a6fcb19
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 00007f4d0a756f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea57c2e0f R14: 00007f4d07c72300 R15: 0000000000022000
 </TASK>
irq event stamp: 12729
hardirqs last  enabled at (12831): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (12868): [<ffffffff812f94cd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (5596): [<ffffffff8118cfdc>] __irq_exit_rcu+0xcc/0x110
softirqs last disabled at (5493): [<ffffffff8118cfdc>] __irq_exit_rcu+0xcc/0x110
---[ end trace 0000000000000000 ]---
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5528 comm=syz-executor.3
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5544 comm=syz-executor.3
loop7: detected capacity change from 0 to 336
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop4: detected capacity change from 0 to 336
FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)