crash in iflib_fast_intr

[peter.blok at bsd4all.org]

This is with an igb interface.

Peter
> On 18 Jan 2017, at 15:31, Sean Bruno <sbruno at freebsd.org> wrote:
> 
> 
> 
> On 01/18/17 03:37, peter.blok at bsd4all.org <mailto:peter.blok at bsd4all.org> wrote:
>> Hi,
>> 
>> A kernel without option EARLY_AP_STARTUP crashes in if lib_fast_intr. Since GENERIC now has EARLY_AP_STARTUP, this probably got unnoticed. Problem is reproducible.
>> 
>> KDB: stack backtrace:
>> #0 0xffffffff805cec97 at kdb_backtrace+0x67
>> #1 0xffffffff80584816 at vpanic+0x186
>> #2 0xffffffff80584683 at panic+0x43
>> #3 0xffffffff8090f222 at trap_fatal+0x322
>> #4 0xffffffff8090f3ec at trap_pfault+0x1bc
>> #5 0xffffffff8090eaa0 at trap+0x280
>> #6 0xffffffff808f35e1 at calltrap+0x8
>> #7 0xffffffff806a202d at iflib_fast_intr+0x3d
>> #8 0xffffffff8054963b at intr_event_handle+0x9b
>> #9 0xffffffff80965f38 at intr_execute_handlers+0x48
>> #10 0xffffffff8096b1cf at lapic_handle_intr+0x3f
>> #11 0xffffffff808f3cc7 at Xapic_isr1+0xb7
>> #12 0xffffffff805b994a at sched_idletd+0x37a
>> #13 0xffffffff805460f5 at fork_exit+0x85
>> #14 0xffffffff808f3b1e at fork_trampoline+0xe
>> 
>> Peter
> 
> Thanks for the report.  We're looking at this.
> 
> This is with an igb(4) interface or em(4)?
> 
> sean