From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Date: Mon, 9 Nov 2020 22:55:59 -0500 Subject: [Cluster-devel] [PATCH AUTOSEL 4.14 03/14] gfs2: Add missing truncate_inode_pages_final for sd_aspace In-Reply-To: <20201110035611.424867-1-sashal@kernel.org> References: <20201110035611.424867-1-sashal@kernel.org> Message-ID: <20201110035611.424867-3-sashal@kernel.org> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit From: Bob Peterson [ Upstream commit a9dd945ccef07a904e412f208f8de708a3d7159e ] Gfs2 creates an address space for its rgrps called sd_aspace, but it never called truncate_inode_pages_final on it. This confused vfs greatly which tried to reference the address space after gfs2 had freed the superblock that contained it. This patch adds a call to truncate_inode_pages_final for sd_aspace, thus avoiding the use-after-free. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Signed-off-by: Sasha Levin --- fs/gfs2/super.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index c3f3f1ae4e1b7..639e2c86758a4 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -924,6 +924,7 @@ static void gfs2_put_super(struct super_block *sb) gfs2_jindex_free(sdp); /* Take apart glock structures and buffer lists */ gfs2_gl_hash_clear(sdp); + truncate_inode_pages_final(&sdp->sd_aspace); gfs2_delete_debugfs_file(sdp); /* Unmount the locking protocol */ gfs2_lm_unmount(sdp); -- 2.27.0