[Bug 212115] kldunload pf causes panic

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212115

shriyogeshchandra at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |shriyogeshchandra at gmail.com

--- Comment #1 from shriyogeshchandra at gmail.com ---
Just signed up here, so apologies for any transgressions. I too experience this
bug. 

In case it helps someone better equipped, here is the dump (copied from the
terminal running the virtual machine): 

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x3b0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80ad43cb
stack pointer           = 0x28:0xfffffe000023a3a0
frame pointer           = 0x28:0xfffffe000023a430
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 2166 (kldunload)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff80b24077 at kdb_backtrace+0x67
#1 0xffffffff80ad93e2 at vpanic+0x182
#2 0xffffffff80ad9253 at panic+0x43
#3 0xffffffff80fa0d51 at trap_fatal+0x351
#4 0xffffffff80fa0f43 at trap_pfault+0x1e3
#5 0xffffffff80fa04ec at trap+0x26c
#6 0xffffffff80f84141 at calltrap+0x8
#7 0xffffffff82234eb1 at vnet_pf_uninit+0xa1
#8 0xffffffff80aa5de0 at linker_file_unload+0x720
#9 0xffffffff80aa71bc at kern_kldunload+0xfc
#10 0xffffffff80fa16ae at amd64_syscall+0x4ce
#11 0xffffffff80f8442b at Xfast_syscall+0xfb
Uptime: 9h2m39s
Dumping 220 out of 991 MB:..8%..15%..22%..37%..44%..51%..66%..73%..87%..95%
Dump complete

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