userfaultfd: non-cooperative: fix fork fctx->new memleak
authorMike Rapoport <rppt@linux.vnet.ibm.com>
Fri, 10 Mar 2017 00:17:09 +0000 (16:17 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 10 Mar 2017 01:01:10 +0000 (17:01 -0800)
commit7eb76d457fd758d396bc2e65cb0ace5aae614149
tree65cef25c2ccabe3574891256e13292939270bdce
parentbfc7228b9a9647e1c353e50b40297a2929801759
userfaultfd: non-cooperative: fix fork fctx->new memleak

We have a memleak in the ->new ctx if the uffd of the parent is closed
before the fork event is read, nothing frees the new context.

Link: http://lkml.kernel.org/r/20170302173738.18994-2-aarcange@redhat.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/userfaultfd.c