Fix race in process_vm_rw_core
authorChristopher Yeoh <cyeoh@au1.ibm.com>
Thu, 2 Feb 2012 01:04:09 +0000 (11:04 +1030)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 2 Feb 2012 20:55:17 +0000 (12:55 -0800)
commit8cdb878dcb359fd1137e9abdee9322f5e9bcfdf8
tree146afc01f3c1d7cbc944328484d077032bc53bfd
parent24b36da33c64368775f4ef9386d44dce1d2bc8cf
Fix race in process_vm_rw_core

This fixes the race in process_vm_core found by Oleg (see

  http://article.gmane.org/gmane.linux.kernel/1235667/

for details).

This has been updated since I last sent it as the creation of the new
mm_access() function did almost exactly the same thing as parts of the
previous version of this patch did.

In order to use mm_access() even when /proc isn't enabled, we move it to
kernel/fork.c where other related process mm access functions already
are.

Signed-off-by: Chris Yeoh <yeohc@au1.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/base.c
include/linux/sched.h
kernel/fork.c
mm/process_vm_access.c