From: Stephen Wilson <wilsons@start.ca>
Date: Sun, 13 Mar 2011 19:49:21 +0000 (-0400)
Subject: proc: disable mem_write after exec
X-Git-Tag: v2.6.39-rc1~99^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26947f8c8f9598209001cdcd31bb2162a2e54691;p=pandora-kernel.git

proc: disable mem_write after exec

This change makes mem_write() observe the same constraints as mem_read().  This
is particularly important for mem_write as an accidental leak of the fd across
an exec could result in arbitrary modification of the target process' memory.
IOW, /proc/pid/mem is implicitly close-on-exec.

Signed-off-by: Stephen Wilson <wilsons@start.ca>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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