From: Oleg Nesterov <oleg@redhat.com>
Date: Sun, 16 Sep 2012 17:07:41 +0000 (+0200)
Subject: uprobes: Change valid_vma() to demand VM_MAYEXEC rather than VM_EXEC
X-Git-Tag: v3.7-rc3~40^2~1^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78a320542e6cdb2800cd736b2d136e4261d34f43;p=pandora-kernel.git

uprobes: Change valid_vma() to demand VM_MAYEXEC rather than VM_EXEC

uprobe_register() or uprobe_mmap() requires VM_READ | VM_EXEC, this
is not right. An apllication can do mprotect(PROT_EXEC) later and
execute this code.

Change valid_vma(is_register => true) to check VM_MAYEXEC instead.
No need to check VM_MAYREAD, it is always set.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
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