ecryptfs: forbid opening files without mmap handler
authorJann Horn <jannh@google.com>
Wed, 1 Jun 2016 09:55:06 +0000 (11:55 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 24 Jun 2016 17:15:29 +0000 (10:15 -0700)
commitd773dd598fd0d59b1fdd3c62d182ea1ab11e909e
tree348772ae3354ed9d84fee876999938aad8b6fc00
parent4d827bfbc042e1fc4da2cbac519946eebbe218a1
ecryptfs: forbid opening files without mmap handler

commit 2f36db71009304b3f0b95afacd8eba1f9f046b87 upstream.

This prevents users from triggering a stack overflow through a recursive
invocation of pagefault handling that involves mapping procfs files into
virtual memory.

Signed-off-by: Jann Horn <jannh@google.com>
Acked-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ecryptfs/kthread.c