Date: Sat, 28 Mar 2015 17:41:16 -0400 From: Garrett Wollman <wollman@bimajority.org> To: freebsd-fs@freebsd.org Subject: Serious overflow/signedness issue in NFS server Message-ID: <21783.8188.747673.152040@hergotha.csail.mit.edu>
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Yesterday I upgraded my production NFS servers to 10.1 from 9.3. Very quickly, my users ran into the kernel RPC's buffer space throttling mechanism. Besides having a stupidly low and arbitrary hard-coded limit, this code also has overflow bugs which which were exposed by the switch to clang as the system compiler. Please have a look at <https://reviews.freebsd.org/D2165>; for what I think is going to be the fix, and if you have a FreeBSD phabricator account, please sign on as a reviewer. I'm sure there are other lingering overflow bugs in this code. -GAWollman
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