Pull up following revision(s) (requested by mrg in ticket #1481):
sys/compat/ibcs2/ibcs2_exec_coff.c: 1.27-1.29
sys/compat/ibcs2/ibcs2_ioctl.c: 1.46
sys/compat/ibcs2/ibcs2_stat.c: 1.49-1.50
Check for NUL termination within the buffer we have.
From Ilja Van Sprundel.
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Make sure we have enough space in the buffer before reading it.
From Ilja Van Sprundel.
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Make sure we move forward over the buffer.
From Ilja Van Sprundel.
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Zero buffers in ibcs2 ioctl to avoid disclosing stack to userland.
From Ilja Van Sprundel.
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Don't drop vnode ref until we're done with mount in ibcs2_stat(v)fs.
Nothing else guarantees the mount will stick around.
From Ilja Van Sprundel.
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Little happy on the commit trigger.  Actually use the out label.

(snj)