ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()
authorLuis Henriques <luis.henriques@canonical.com>
Wed, 11 Jul 2012 21:02:10 +0000 (14:02 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Jul 2012 23:04:43 +0000 (16:04 -0700)
commita4e08d001f2e50bb8b3c4eebadcf08e5535f02ee
tree6ab47d995bd4c0a3a388dcbc11ffbe775274d88c
parent6b4fa63a9e5696fa43f25143f104ef0bea642222
ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()

As ocfs2_fallocate() will invoke __ocfs2_change_file_space() with a NULL
as the first parameter (file), it may trigger a NULL pointer dereferrence
due to a missing check.

Addresses http://bugs.launchpad.net/bugs/1006012

Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Reported-by: Bret Towe <magnade@gmail.com>
Tested-by: Bret Towe <magnade@gmail.com>
Cc: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/ocfs2/file.c