I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
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
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4198 at lib/iov_iter.c:385 _copy_from_iter+0x2f1/0x1320
Modules linked in:
CPU: 0 PID: 4198 Comm: syz-executor.5 Not tainted 6.4.0-rc4-next-20230602 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2f1/0x1320
Code: b2 ff ff 89 c3 e9 1f ff ff ff e8 7a e0 35 ff be 85 01 00 00 48 c7 c7 60 ea 9e 84 e8 59 3a 5a ff e9 13 fe ff ff e8 5f e0 35 ff <0f> 0b 45 31 f6 e9 67 ff ff ff e8 50 e0 35 ff 31 ff 89 ee e8 87 db
RSP: 0018:ffff888042fd7608 EFLAGS: 00010216
RAX: 00000000000035ab RBX: 0000000000000000 RCX: ffffc90011c75000
RDX: 0000000000040000 RSI: ffffffff82162b21 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff846000aa R12: 0000000000001000
R13: ffffea000113a400 R14: 0000000000001000 R15: ffff888042fd7838
FS:  00007f83f05fa700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd492e50f0 CR3: 000000000ef42000 CR4: 0000000000350ef0
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+0x2b8/0xd40
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f83f3084b19
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:00007f83f05fa188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f83f3197f60 RCX: 00007f83f3084b19
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 00007f83f30def6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc86737adf R14: 00007f83f05fa300 R15: 0000000000022000
 </TASK>
irq event stamp: 4241
hardirqs last  enabled at (4249): [<ffffffff813067b4>] vprintk_emit+0x504/0x560
hardirqs last disabled at (4256): [<ffffffff8130674b>] vprintk_emit+0x49b/0x560
softirqs last  enabled at (3490): [<ffffffff8118de53>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (3473): [<ffffffff8118de53>] irq_exit_rcu+0x93/0xc0
---[ end trace 0000000000000000 ]---
loop4: detected capacity change from 0 to 136
process 'syz-executor.2' launched './file1/file0' with NULL argv: empty string added
ISOFS: Unable to identify CD-ROM format.
loop4: detected capacity change from 0 to 136
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4206 comm=syz-executor.5
audit: type=1400 audit(1685936764.315:11): avc:  denied  { read } for  pid=4197 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
ISOFS: Unable to identify CD-ROM format.