crash in iflib_fast_intr

[Shawn Webb]

On Wed, Jan 18, 2017 at 02:45:34PM -0500, Shawn Webb wrote:
> On Wed, Jan 18, 2017 at 07:31:12AM -0700, Sean Bruno wrote:
> > 
> > 
> > On 01/18/17 03:37, 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
> > 
> 
> I'm getting something similar with em(4):
> 
> https://goo.gl/photos/MXiFXtatBYcWagJTA
> 
> I'm at this commit in HardenedBSD:
> 
> https://github.com/HardenedBSD/hardenedBSD/commit/2108b0d56984115eb52e72bd16539071064b348e

r312434 fixes this for me. Thanks a lot for the quick turnaround!

-- 
Shawn Webb
Cofounder and Security Engineer
HardenedBSD

GPG Key ID:          0x6A84658F52456EEE
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