The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x f54aa97fb7e5329a373f9df4e5e213ced4fc8759 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '167811000666204@kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
f54aa97fb7e5 ("udf: Fix off-by-one error when discarding preallocation") f3a30be77750 ("udf: Factor out block mapping into udf_map_block()") a27b2923de7e ("udf: Move udf_expand_dir_adinicb() to its callsite") 57bda9fb169d ("udf: Convert udf_expand_dir_adinicb() to new directory iteration") 16d055656814 ("udf: Discard preallocation before extending file with a hole")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From f54aa97fb7e5329a373f9df4e5e213ced4fc8759 Mon Sep 17 00:00:00 2001 From: Jan Kara jack@suse.cz Date: Mon, 23 Jan 2023 14:29:15 +0100 Subject: [PATCH] udf: Fix off-by-one error when discarding preallocation
The condition determining whether the preallocation can be used had an off-by-one error so we didn't discard preallocation when new allocation was just following it. This can then confuse code in inode_getblk().
CC: stable@vger.kernel.org Fixes: 16d055656814 ("udf: Discard preallocation before extending file with a hole") Signed-off-by: Jan Kara jack@suse.cz
diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 51deada8b928..ee440d16411e 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -361,7 +361,7 @@ static int udf_map_block(struct inode *inode, struct udf_map_rq *map) * Block beyond EOF and prealloc extents? Just discard preallocation * as it is not useful and complicates things. */ - if (((loff_t)map->lblk) << inode->i_blkbits > iinfo->i_lenExtents) + if (((loff_t)map->lblk) << inode->i_blkbits >= iinfo->i_lenExtents) udf_discard_prealloc(inode); udf_clear_extent_cache(inode); err = inode_getblk(inode, map);