[Bug 233377] [PowerPC64] Panic during high disk I/O activity
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Sun Nov 25 19:20:29 UTC 2018
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233377
--- Comment #7 from Mark Johnston <markj at FreeBSD.org> ---
(In reply to Sean Bruno from comment #6)
Indeed, this points again at the UMA bucket zones. The stack is somewhat
bogus; I believe the only way that we can call uma_zalloc() while freeing
something is by allocating a bucket. I think the best approach will be to
figure out why memguard-enabled kernels don't boot, and then use memguard to
find the use-after-free.
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