Bug 218189

Summary: panic starting Xorg after r315949
Product: Base System Reporter: Charles Lecklider <freebsd>
Component: kernAssignee: freebsd-bugs (Nobody) <bugs>
Status: New ---    
Severity: Affects Only Me CC: freebsd
Priority: ---    
Version: 11.0-STABLE   
Hardware: amd64   
OS: Any   
Attachments:
Description Flags
dmesg none

Description Charles Lecklider 2017-03-28 17:23:09 UTC
Created attachment 181275 [details]
dmesg

r315943 works fine. r315949 and later panic running startx:

Fatal trap 12: page fault while in kernel mode
cpuid = 5; apic id = 05
fault virtual address   = 0x4
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff82d50994
stack pointer           = 0x28:0xfffffe10506cc4b0
frame pointer           = 0x28:0xfffffe10506cc4b0
code segment            = base rx0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 3
current process         = 1692 (Xorg)
trap number             = 12
panic: page fault
cpuid = 5
KDB: stack backtrace:
#0 0xffffffff80a9e497 at kdb_backtrace+0x67
#1 0xffffffff80a5aaa6 at vpanic+0x186
#2 0xffffffff80a5a913 at panic+0x43
#3 0xffffffff80ec5430 at trap_fatal+0x320
#4 0xffffffff80ec55fc at trap_pfault+0x1bc
#5 0xffffffff80ec4cab at trap+0x27b
#6 0xffffffff80ea98a1 at calltrap+0x8
#7 0xffffffff82d1d4ef at _nv017563rm+0x1f