This is a note to let you know that I've just added the patch titled
gfs2: Add missing truncate_inode_pages_final for sd_aspace
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gfs2-add-missing-truncate_inode_pages_final-for-sd_a.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b83155f837eb5dedcad831fc062b5a3c8fa7e986
Author: Bob Peterson <rpeterso@xxxxxxxxxx>
Date: Tue Oct 27 10:10:02 2020 -0500
gfs2: Add missing truncate_inode_pages_final for sd_aspace
[ 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@xxxxxxxxxx>
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 @@ restart:
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);
