commit 9a2458a633d4b3c9e0eae506da40cf44dc075314
author Rasmus Villemoes <linux@rasmusvillemoes.dk> Mon Jul 08 15:59:48 2013 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Tue Jul 09 10:33:20 2013 -0700
tree 6212adc65070486edc212587c8f3a16452d810ec
parent 34e3a58c66aafd90cc16c061569fbefc3ff451e9

mm: mremap: validate input before taking lock

This patch is very similar to commit 84d96d897671 ("mm: madvise:
complete input validation before taking lock"): perform some basic
validation of the input to mremap() before taking the
&current->mm->mmap_sem lock.

This also makes the MREMAP_FIXED => MREMAP_MAYMOVE dependency slightly
more explicit.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>