uvm_fault: _copyinstr

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 0e444de8113c sync
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10efaa70580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=3bcb000ffd1b8ac74c2a

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1a716a836012/disk-0e444de8.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/abe162202d17/bsd-0e444de8.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7c49d518f650/kernel-0e444de8.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3bcb00...@syzkaller.appspotmail.com

uvm_fault(0xfffffd806beb13d8, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at _copyinstr+0x58: lodsb (%rsi)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 13602 43624 0 0x2000 0x4000000 0K syz-executor
_copyinstr() at _copyinstr+0x58
sys_unveil(ffff80003c447d58,ffff80002c3e2870,ffff80002c3e27c0) at sys_unveil+0x152 sys/kern/vfs_syscalls.c:982
syscall(ffff80002c3e2870) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002c3e2870) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5262dafd870, count: 11
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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.