From: Bob Peterson rpeterso@redhat.com
[ 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 rpeterso@redhat.com Signed-off-by: Andreas Gruenbacher agruenba@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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);