program syz-executor.4 not setting count and/or reply_len properly
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6988 at lib/iov_iter.c:385 _copy_from_iter+0x2c2/0x11f0 lib/iov_iter.c:385
Modules linked in:
CPU: 1 PID: 6988 Comm: syz-executor.4 Not tainted 6.5.0-rc7-syzkaller-00182-g3b35375f19fe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:_copy_from_iter+0x2c2/0x11f0 lib/iov_iter.c:385
Code: 5d 41 5c 41 5d 41 5e 41 5f c3 e8 79 82 68 fd be 85 01 00 00 48 c7 c7 00 bc c7 8a e8 98 be a6 fd e9 48 fe ff ff e8 5e 82 68 fd <0f> 0b 45 31 ff eb 88 e8 52 82 68 fd 31 ff 44 89 e6 e8 78 7d 68 fd
RSP: 0018:ffffc900151af5f0 EFLAGS: 00010283
RAX: 0000000000008129 RBX: ffffc900151af838 RCX: ffffc9000d43b000
RDX: 0000000000040000 RSI: ffffffff841d8682 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000edc
R13: 0000000000000edc R14: 0000000000000000 R15: 0000160000000000
FS:  00007f089257d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc53ad85fe CR3: 000000002177a000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 copy_page_from_iter lib/iov_iter.c:542 [inline]
 copy_page_from_iter+0xa5/0x120 lib/iov_iter.c:531
 bio_copy_from_iter block/blk-map.c:56 [inline]
 bio_copy_user_iov block/blk-map.c:211 [inline]
 blk_rq_map_user_iov+0x9d5/0x17e0 block/blk-map.c:662
 blk_rq_map_user block/blk-map.c:691 [inline]
 blk_rq_map_user_io+0x202/0x230 block/blk-map.c:724
 sg_start_req drivers/scsi/sg.c:1818 [inline]
 sg_common_write.constprop.0+0xd61/0x1c90 drivers/scsi/sg.c:803
 sg_write+0x82f/0xe10 drivers/scsi/sg.c:707
 vfs_write+0x2a4/0xe40 fs/read_write.c:582
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f089187cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f089257d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f089199bf80 RCX: 00007f089187cae9
RDX: 0000000000000058 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f08918c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f089199bf80 R15: 00007ffe8b21f468
 </TASK>