On Thu, 23 Mar 2017 11:19:38 +0100 Dmitry Vyukov [off-list ref] wrote:

Hello,

I've got the following BUG while running syzkaller fuzzer.
Note the injected kmalloc failure, most likely it's the root cause.

Yes, probably the logic(?) in region_chg() leaked a
resv->adds_in_progress++, although I'm not sure how.  And afaict that
code can leak the memory at *nrg if the `trg' allocation attempt failed
on the second or later pass around the retry loop.

Blah.  Does someone want to take a look at it?

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