[Bug 217994] Kernel panic in native_lapic_setup with 12-CURRENT on EC2 machine

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217994

--- Comment #13 from Sylvain Garrigues <sylvain at sylvaingarrigues.com> ---
(In reply to Andriy Gapon from comment #12)

root at ip-172-31-17-21:~ # kgdb7121 /mnt/boot/kernel/kernel
GNU gdb (GDB) 7.12.1 [GDB v7.12.1 for FreeBSD]
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-portbld-freebsd12.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /mnt/boot/kernel/kernel...(no debugging symbols
found)...done.
(kgdb) disassemble native_lapic_setup
Dump of assembler code for function native_lapic_setup:
   0xffffffff8107fd30 <+0>:     push   %rbp
   0xffffffff8107fd31 <+1>:     mov    %rsp,%rbp
   0xffffffff8107fd34 <+4>:     push   %r15
   0xffffffff8107fd36 <+6>:     push   %r14
   0xffffffff8107fd38 <+8>:     push   %r13
   0xffffffff8107fd3a <+10>:    push   %r12
   0xffffffff8107fd3c <+12>:    push   %rbx
   0xffffffff8107fd3d <+13>:    sub    $0x38,%rsp
   0xffffffff8107fd41 <+17>:    mov    %edi,%r14d
   0xffffffff8107fd44 <+20>:    mov    0xffffffff81d6d320,%rax
   0xffffffff8107fd4c <+28>:    mov    %rax,-0x30(%rbp)
   0xffffffff8107fd50 <+32>:    pushfq 
   0xffffffff8107fd51 <+33>:    pop    %rbx
   0xffffffff8107fd52 <+34>:    cli    
   0xffffffff8107fd53 <+35>:    callq  *0xffffffff81a216d0
   0xffffffff8107fd5a <+42>:    movslq %eax,%rsi
   0xffffffff8107fd5d <+45>:    cmpl   $0x0,0xffffffff81edba40
   0xffffffff8107fd65 <+53>:    je     0xffffffff8107fdaa
<native_lapic_setup+122>
   0xffffffff8107fd67 <+55>:    mov    $0x803,%ecx
   0xffffffff8107fd6c <+60>:    rdmsr  
   0xffffffff8107fd6e <+62>:    mov    $0x810,%ecx
   0xffffffff8107fd73 <+67>:    bextr  %ecx,%eax,%r12d
   0xffffffff8107fd78 <+72>:    cmpl   $0x0,0xffffffff81edba40
   0xffffffff8107fd80 <+80>:    je     0xffffffff8107fdbd
<native_lapic_setup+141>
   0xffffffff8107fd82 <+82>:    mov    $0x808,%ecx
   0xffffffff8107fd87 <+87>:    rdmsr  
   0xffffffff8107fd89 <+89>:    and    $0xffffff00,%eax
   0xffffffff8107fd8e <+94>:    cmpl   $0x0,0xffffffff81edba40
   0xffffffff8107fd96 <+102>:   je     0xffffffff810800e2
<native_lapic_setup+946>
   0xffffffff8107fd9c <+108>:   mfence 
   0xffffffff8107fd9f <+111>:   xor    %edx,%edx
   0xffffffff8107fda1 <+113>:   mov    $0x808,%ecx
   0xffffffff8107fda6 <+118>:   wrmsr  
   0xffffffff8107fda8 <+120>:   jmp    0xffffffff8107fdd6
<native_lapic_setup+166>
   0xffffffff8107fdaa <+122>:   mov    0xffffffff81edba38,%rax
   0xffffffff8107fdb2 <+130>:   mov    $0x810,%ecx
   0xffffffff8107fdb7 <+135>:   bextr  %ecx,0x30(%rax),%r12d
   0xffffffff8107fdbd <+141>:   mov    0xffffffff81edba38,%rcx
   0xffffffff8107fdc5 <+149>:   mov    $0xffffff00,%eax
   0xffffffff8107fdca <+154>:   and    0x80(%rcx),%eax
   0xffffffff8107fdd0 <+160>:   mov    %eax,0x80(%rcx)
   0xffffffff8107fdd6 <+166>:   imul   $0x350,%rsi,%r13
   0xffffffff8107fddd <+173>:   cmpl   $0x0,0xffffffff81edba40
   0xffffffff8107fde5 <+181>:   mov    %rbx,-0x58(%rbp)
   0xffffffff8107fde9 <+185>:   je     0xffffffff8107fe29
<native_lapic_setup+249>
   0xffffffff8107fdeb <+187>:   mov    $0x80f,%ecx
   0xffffffff8107fdf0 <+192>:   rdmsr  
   0xffffffff8107fdf2 <+194>:   mov    %eax,%ecx
   0xffffffff8107fdf4 <+196>:   and    $0xfffffc00,%ecx
   0xffffffff8107fdfa <+202>:   cmpl   $0x0,0xffffffff81edba28
   0xffffffff8107fe02 <+210>:   mov    $0x1ff,%edx
   0xffffffff8107fe07 <+215>:   mov    $0x11ff,%eax
   0xffffffff8107fe0c <+220>:   cmove  %edx,%eax
   0xffffffff8107fe0f <+223>:   or     %ecx,%eax

-- 
You are receiving this mail because:
You are the assignee for the bug.