Re: [4.7+] various memory corruption reports.

From: Andrey Ryabinin
Date: Fri Jul 29 2016 - 11:21:21 EST

2016-07-29 18:19 GMT+03:00 Dave Jones <davej@xxxxxxxxxxxxxxxxx>:
> On Fri, Jul 29, 2016 at 11:05:14AM -0400, Dave Jones wrote:
> > I've just gotten back into running trinity on daily pulls of master, and it seems pretty horrific
> > right now. I can reproduce some kind of memory corruption within a couple minutes runtime.
> >
> > ,,,
> >
> > I'll work on narrowing down the exact syscalls needed to trigger this.
> Even limiting it to do just a simple syscall like execve (which fails most the time in trinity)
> triggers it, suggesting it's not syscall related, but the fact that trinity is forking/killing
> tons of processes at high rate is stressing something more fundamental.
> Given how easy this reproduces, I'll see if bisecting gives up something useful.

I suspect this is false positives due to changes in KASAN.
Bisection probably will point to
80a9201a5965f4715d5c09790862e0df84ce0614 ("mm, kasan: switch SLUB to
stackdepot, enable memory quarantine for SLUB)"