K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2016-04-26T20:36:32.513139Z
K 7
svn:log
V 514
msdosfs: Prevent buffer overflow when expanding win95 names

In win2unixfn() we expand Windows 95 style long names. In some cases that
requires moving the data in the nbp->nb_buf buffer backwards to make room. That
code failed to check for overflows, leading to a stack overflow in win2unixfn().

We now check for this event, and mark the entire conversion as failed in that
case. This means we present the 8 character, dos style, name instead.

PR: 204643
Differential Revision:	https://reviews.freebsd.org/D6015

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