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Subject: [Bug 138782] [panic] sbflush_internal: cc 0 || mb 0xffffff004127b000
 || mbcnt 2304
Date: Wed, 18 Mar 2015 17:37:09 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=138782

--- Comment #6 from Hiren Panchasara <hiren@FreeBSD.org> ---
I could not figure out the root-cause but found an interesting fix that stops
possible overflow in sockbuf which _may_ cause this. 

Discussion:
https://lists.freebsd.org/pipermail/freebsd-arch/2015-February/016739.html

Fix: https://svnweb.freebsd.org/changeset/base/278729

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