loop6: detected capacity change from 0 to 40
sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.4 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12256 at lib/iov_iter.c:629 _copy_from_iter+0x2bf/0x1170
Modules linked in:
CPU: 0 PID: 12256 Comm: syz-executor.4 Not tainted 6.2.0-rc3-next-20230111 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2bf/0x1170
Code: 5d 41 5e 41 5f e9 35 4a 32 02 e8 fc 2e 37 ff be 79 02 00 00 48 c7 c7 00 d6 9e 84 e8 cb db 5a ff e9 48 fe ff ff e8 e1 2e 37 ff <0f> 0b 45 31 f6 eb 87 e8 d5 2e 37 ff 31 ff 89 ee e8 9c 2a 37 ff 40
RSP: 0018:ffff88804953f608 EFLAGS: 00010216
RAX: 00000000000046b8 RBX: 0000000000000000 RCX: ffffc900029da000
RDX: 0000000000040000 RSI: ffffffff8212476f RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804953f838
R13: ffffea0001278600 R14: 0000000000001000 R15: ffff88804953f838
FS:  00007ff45ea03700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d226000 CR3: 0000000049dd6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 copy_page_from_iter+0xe3/0x180
 blk_rq_map_user_iov+0xb15/0x16a0
 blk_rq_map_user_io+0x1d1/0x200
 sg_common_write.constprop.0+0xd8d/0x15f0
 sg_write.part.0+0x698/0xa90
 sg_write+0x8d/0xe0
 vfs_write+0x2cf/0xdd0
 ksys_write+0x12b/0x260
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=12259 comm=syz-executor.4
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff46148db19
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:00007ff45ea03188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff4615a0f60 RCX: 00007ff46148db19
audit: type=1400 audit(1673515169.588:10): avc:  denied  { read } for  pid=12244 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 00007ff4614e7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc18f5e36f R14: 00007ff45ea03300 R15: 0000000000022000
 </TASK>
irq event stamp: 5677
hardirqs last  enabled at (5749): [<ffffffff812e0d28>] __up_console_sem+0x78/0x80
hardirqs last disabled at (5808): [<ffffffff812e0d0d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (5378): [<ffffffff81181deb>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (5101): [<ffffffff81181deb>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
syz-executor.6: attempt to access beyond end of device
loop6: rw=2049, sector=40, nr_sectors = 4 limit=40
buffer_io_error: 1494 callbacks suppressed
Buffer I/O error on dev loop6, logical block 10, lost async page write
sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.4 not setting count and/or reply_len properly
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=12259 comm=syz-executor.4
syz-executor.7 uses obsolete (PF_INET,SOCK_PACKET)
kworker/u4:4: attempt to access beyond end of device
loop6: rw=1, sector=44, nr_sectors = 80 limit=40
kworker/u4:4: attempt to access beyond end of device
loop6: rw=1, sector=124, nr_sectors = 4 limit=40
Buffer I/O error on dev loop6, logical block 31, lost async page write