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Message-Id: <1340231684-1667-1-git-send-email-luis.henriques@canonical.com> Date: Wed, 20 Jun 2012 23:34:44 +0100 From: Luis Henriques <luis.henriques@...onical.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Bret Towe <magnade@...il.com>, linux-kernel@...r.kernel.org, ocfs2-devel@....oracle.com, mfasheh@...e.com, jlbec@...lplan.org, sunil.mushran@...cle.com Subject: [PATCH] ocfs2: Fix NULL pointer dereferrence 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. See http://bugs.launchpad.net/bugs/1006012. Signed-off-by: Luis Henriques <luis.henriques@...onical.com> --- fs/ocfs2/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 6e39668..84822a4 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1950,7 +1950,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode, if (ret < 0) mlog_errno(ret); - if (file->f_flags & O_SYNC) + if (file && (file->f_flags & O_SYNC)) handle->h_sync = 1; ocfs2_commit_trans(osb, handle); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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