SYZFAIL: pselect failed

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3a6d4b98bde9 KNF
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=139df558580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=fff6ab753387f1a3ad5f

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c8874b18462e/disk-3a6d4b98.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/7476f7b7aaf8/bsd-3a6d4b98.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/756e8b004ebd/kernel-3a6d4b98.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fff6ab...@syzkaller.appspotmail.com

SYZFAIL: pselect failed
(errno 14: Bad address)


OpenBSD/amd64 (ci-openbsd-main-3.us-central1-b.c.syzkaller.internal) (tty00)

login: set $lines = 0
uvn_flush: obj=0xfffffd806ee1c558, offset=0x3ff000. error during pageout.
uvn_flush: WARNING: changes to page may be lost!
Password:
Login incorrect
login: show panic
Password:
Login incorrect
login: show registers
Password:
Login incorrect
login: ps
Password:
Login incorrect
show malloc
login: UVM: pid 86064 (login), uid 0 killed: out of swap


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