program syz-executor.6 not setting count and/or reply_len properly
FAT-fs (loop5): bogus number of reserved sectors
FAT-fs (loop5): Can't find a valid FAT filesystem
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WARNING: CPU: 1 PID: 5488 at lib/iov_iter.c:629 _copy_from_iter+0x2bf/0x1150
Modules linked in:
CPU: 1 PID: 5488 Comm: syz-executor.6 Not tainted 6.2.0-rc1-next-20221226 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:_copy_from_iter+0x2bf/0x1150
Code: 5d 41 5e 41 5f e9 a5 9f 2f 02 e8 9c a3 37 ff be 79 02 00 00 48 c7 c7 80 cb 9e 84 e8 6b 18 5b ff e9 48 fe ff ff e8 81 a3 37 ff <0f> 0b 45 31 f6 eb 87 e8 75 a3 37 ff 31 ff 89 ee e8 3c 9f 37 ff 40
RSP: 0018:ffff8880463cf5e8 EFLAGS: 00010202
RAX: 0000000000003e30 RBX: 0000000000000000 RCX: ffffc90004e0a000
RDX: 0000000000040000 RSI: ffffffff821139ff RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880463cf818
R13: ffffea000117ce00 R14: 0000000000001000 R15: ffff8880463cf818
FS:  00007ff51126a700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c22c000 CR3: 00000000451de000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 copy_page_from_iter+0xe3/0x180
 blk_rq_map_user_iov+0xb0c/0x1650
 blk_rq_map_user_io+0x1ee/0x220
 sg_common_write.constprop.0+0xd84/0x15e0
 sg_write.part.0+0x698/0xa90
 sg_write+0x88/0xe0
 vfs_write+0x2cf/0xd90
 ksys_write+0x12b/0x260
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff513cf4b19
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:00007ff51126a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff513e07f60 RCX: 00007ff513cf4b19
RDX: 0000000000000125 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007ff513d4ef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa25834bf R14: 00007ff51126a300 R15: 0000000000022000
 </TASK>
irq event stamp: 1187
hardirqs last  enabled at (1199): [<ffffffff812dcdd8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (1208): [<ffffffff812dcdbd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (730): [<ffffffff8118087b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (709): [<ffffffff8118087b>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
loop0: detected capacity change from 0 to 40
FAT-fs (loop0): bogus number of reserved sectors
FAT-fs (loop0): Can't find a valid FAT filesystem
loop4: detected capacity change from 0 to 40
FAT-fs (loop4): bogus number of reserved sectors
FAT-fs (loop4): Can't find a valid FAT filesystem
loop0: detected capacity change from 0 to 40
FAT-fs (loop0): bogus number of reserved sectors
FAT-fs (loop0): Can't find a valid FAT filesystem
loop5: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
sg_write: data in/out 655324/251 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor.6 not setting count and/or reply_len properly