panic: kernel diagnosti

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: ddef1afac53e netinet/ip.h: fix IPTOS_DSCP_VA value to be 0..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17a4e392580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=7a633dea3fd892638bce

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/03c43ffc1311/disk-ddef1afa.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/83e5e1b86b29/bsd-ddef1afa.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4cd511b8b6a3/kernel-ddef1afa.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7a633d...@syzkaller.appspotmail.com

panic: kernel diagnosti
c assertion "pg->wire_c
ount == 0" failed: file
"/syzkaller/managers/m
ain/kernel/sys/uvm/uvm_
page.c", line 1326
Starting stack trace...
panic(ffffffff833791f3) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833b9ae2,ffffffff833a5ef6,52e,ffffffff833d67d4) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagedequeue(fffffd800714ec00) at uvm_pagedequeue+0x2cd sys/uvm/uvm_page.c:1324
uvm_pageclean(fffffd800714ec00) at uvm_pageclean+0x2ac sys/uvm/uvm_page.c:981
uvm_pagefree(fffffd800714ec00) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020
uvm_anfree(fffffd806ffc9258) at uvm_anfree+0xe9 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd8073f558a8) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff800039919650,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c9a7e78) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525
exit1(ffff80002a8c62c0,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259
sys_exit(ffff80002a8c62c0,ffff800039919810,ffff800039919760) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800039919810) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff800039919810) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7bd16b7c36e0, count: 244
End of stack trace.


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