On Thu 24-08-17 13:36:48, Mark Rutland wrote:

On Thu, Aug 24, 2017 at 01:48:34PM +0200, Michal Hocko wrote:

quoted

On Thu 24-08-17 12:37:43, Mark Rutland wrote:

quoted

Hi,

I'm chasing intermittent memory corruption bugs seen at least on rc5,
rc6, and yesterday's HEAD (98b9f8a4549909c6), on arm64. 

It looks like we make use of dangling references to a freed struct file,
which is caught by KASAN. Without KASAN, I see a number of other
intermittent issues that I suspect are the result of this memory
corruption. I've included an example splat below, complete with KASAN's
alloc/free traces at the end of this mail.

Is it possible this is the same issue as the one fixed by
http://lkml.kernel.org/r/20170823211408.31198-1-ebiggers3@gmail.com?

That sounds plausible, and so far the fix seems to help. Thanks for the
pointer!

I'll leave that running for a while, just in case.

Thanks!
-- 
Michal Hocko
SUSE Labs

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