panic: trap type NUM, code=NUM, pc=e88b9

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 2175e0d6ddd5 vio: Don't request csum offload if not negoti..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16cf6e03980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=0db9b494c89771f53ad2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c0e291768edb/disk-2175e0d6.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/e8228a1a56f7/bsd-2175e0d6.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3db803d7289f/kernel-2175e0d6.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0db9b4...@syzkaller.appspotmail.com

panic: trap type 6, code=10, pc=e88b9
Starting stack trace...
panic(ffffffff82fcfa67) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000371dcee0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
acpi_pdirpa() at acpi_pdirpa+0xd472a
rt_clone(ffff8000371dd1b8,fffffd806fd34db8,0) at rt_clone+0x98 sys/net/route.c:383
route_mpath(fffffd806fd34da0,fffffd807b6a3c24,0,0) at route_mpath+0x170 rt_match sys/net/route.c:360 [inline]
route_mpath(fffffd806fd34da0,fffffd807b6a3c24,0,0) at route_mpath+0x170 rtalloc_mpath sys/net/route.c:476 [inline]
route_mpath(fffffd806fd34da0,fffffd807b6a3c24,0,0) at route_mpath+0x170 sys/net/route.c:255
in_pcbselsrc(ffff8000371dd2a8,fffffd807b6a3c20,fffffd806fd34d28) at in_pcbselsrc+0x250
in_pcbconnect(fffffd806fd34d28,fffffd807b6a3c00) at in_pcbconnect+0x11a sys/netinet/in_pcb.c:522
tcp_connect(ffff8000013ae570,fffffd807b6a3c00) at tcp_connect+0x3cb sys/netinet/tcp_usrreq.c:654
sys_connect(ffff800029fd8518,ffff8000371dd4d0,ffff8000371dd420) at sys_connect+0x345 sys/kern/uipc_syscalls.c:422
syscall(ffff8000371dd4d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371dd4d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xaca10791de0, count: 245
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2 Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID f8e08a03-81bc-3227-53c0-939594373760
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.67
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace


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