panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: b0e7aced8b61 Simplify EC_get_builtin_curves().
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17067c5f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=189cd03d088cddbee591

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0a6fe75c7bb2/disk-b0e7aced.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/ebe2772bacfb/bsd-b0e7aced.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/02713b07760a/kernel-b0e7aced.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+189cd0...@syzkaller.appspotmail.com

panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)
" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_pag
e.c", line 1248
Starting stack trace...
panic(ffffffff830b03bc) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8306a3b3,ffffffff82fb556f,4e0,ffffffff830b8d4e) at __assert+0x29
uvm_pageunwire(fffffd8007393b80) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1248
uvm_fault_unwire_locked(fffffd806c1a0d80,e3faadac000,e3faadad000) at uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1695
uvm_unmap_kill_entry_withlock(fffffd806c1a0d80,fffffd806e0990e8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd806c1a0d80) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd806c1a0d80) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a457be0) at reaper+0x225 sys/kern/kern_exit.c:478
end trace frame: 0x0, count: 249
End of stack trace.


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