sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.2 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4251 at lib/iov_iter.c:644 _copy_from_iter+0x2f1/0x1330
Modules linked in:
CPU: 0 PID: 4251 Comm: syz-executor.2 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:ffff888043d37608 EFLAGS: 00010216
RAX: 000000000000452c RBX: 0000000000000000 RCX: ffffc900021d4000
RDX: 0000000000040000 RSI: ffffffff8215d5e1 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000
R13: ffffea0001145200 R14: 0000000000001000 R15: ffff888043d37838
FS:  00007f2c8b16c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c329000 CR3: 0000000017a68000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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: 0033:0x7f2c8dbf6b19
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:00007f2c8b16c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2c8dd09f60 RCX: 00007f2c8dbf6b19
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 00007f2c8dc50f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf85ad61f R14: 00007f2c8b16c300 R15: 0000000000022000
 </TASK>
irq event stamp: 4745
hardirqs last  enabled at (4781): [<ffffffff812fea18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (4810): [<ffffffff812fe9fd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (942): [<ffffffff8118e59c>] __irq_exit_rcu+0xcc/0x110
softirqs last disabled at (839): [<ffffffff8118e59c>] __irq_exit_rcu+0xcc/0x110
---[ end trace 0000000000000000 ]---
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4270 comm=syz-executor.2
audit: type=1400 audit(1683041147.046:13): avc:  denied  { read } for  pid=4246 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.2 not setting count and/or reply_len properly
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4272 comm=syz-executor.2
sr 1:0:0:0: [sr0] CDROM not ready.  Make sure there is a disc in the drive.
sr 1:0:0:0: [sr0] CDROM not ready.  Make sure there is a disc in the drive.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4295 comm=syz-executor.2
loop1: detected capacity change from 0 to 40
syz-executor.6 (4253) used greatest stack depth: 24288 bytes left