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 5.9-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-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 43a11325435ce9909491e1031c4fd6d1f5f29a7d 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 32ae1a7cdaed8..831f6e31d6821 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -732,6 +732,7 @@ 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);