program syz-executor.5 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3843 at lib/iov_iter.c:623 _copy_from_iter+0x2ad/0x1060 lib/iov_iter.c:623
Modules linked in:
CPU: 1 PID: 3843 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-13534-gb01fe98d34f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:_copy_from_iter+0x2ad/0x1060 lib/iov_iter.c:623
Code: 5d 41 5c 41 5d 41 5e 41 5f c3 e8 5e 70 69 fd be 73 02 00 00 48 c7 c7 c0 cf a6 8a e8 7d fe a5 fd e9 56 fe ff ff e8 43 70 69 fd <0f> 0b 45 31 ff eb 8b e8 37 70 69 fd 31 ff 89 ee e8 3e 6c 69 fd 40
RSP: 0018:ffffc9002708f4e0 EFLAGS: 00010216
RAX: 000000000000ade3 RBX: 0000000000000000 RCX: ffffc900066f3000
RDX: 0000000000040000 RSI: ffffffff841b89ed RDI: 0000000000000001
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea0000c99600 R14: ffffc9002708f718 R15: 0000000000000200
FS:  00007f6d4d71e700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d4d6fd718 CR3: 00000000308e5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 copy_page_from_iter lib/iov_iter.c:748 [inline]
 copy_page_from_iter+0x233/0x3f0 lib/iov_iter.c:737
 bio_copy_from_iter block/blk-map.c:55 [inline]
 bio_copy_user_iov block/blk-map.c:210 [inline]
 blk_rq_map_user_iov+0xb5d/0x16e0 block/blk-map.c:661
 blk_rq_map_user block/blk-map.c:690 [inline]
 blk_rq_map_user_io+0x1cd/0x200 block/blk-map.c:723
 sg_start_req drivers/scsi/sg.c:1807 [inline]
 sg_common_write.constprop.0+0xdcd/0x1e00 drivers/scsi/sg.c:803
 sg_write.part.0+0x75d/0xd90 drivers/scsi/sg.c:707
 sg_write+0x8d/0xe0 drivers/scsi/sg.c:226
 do_loop_readv_writev fs/read_write.c:759 [inline]
 do_loop_readv_writev fs/read_write.c:743 [inline]
 do_iter_write+0x4ef/0x700 fs/read_write.c:863
 vfs_writev+0x1aa/0x670 fs/read_write.c:934
 do_writev+0x133/0x2f0 fs/read_write.c:977
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6d4ca8c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6d4d71e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f6d4cbabf80 RCX: 00007f6d4ca8c0f9
RDX: 0000000000000003 RSI: 0000000020000200 RDI: 0000000000000009
RBP: 00007f6d4cae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d4cccfb1f R14: 00007f6d4d71e300 R15: 0000000000022000
 </TASK>