This is a note to let you know that I've just added the patch titled ext4: increase wait time needed before reuse of deleted inode numbers to the 5.6-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: ext4-increase-wait-time-needed-before-reuse-of-delet.patch and it can be found in the queue-5.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 8f51657d9cccb53bf041ced73e85ab17d08a4e4b Author: Theodore Ts'o <tytso@xxxxxxx> Date: Mon Apr 13 22:30:52 2020 -0400 ext4: increase wait time needed before reuse of deleted inode numbers [ Upstream commit a17a9d935dc4a50acefaf319d58030f1da7f115a ] Current wait times have proven to be too short to protect against inode reuses that lead to metadata inconsistencies. Now that we will retry the inode allocation if we can't find any recently deleted inodes, it's a lot safer to increase the recently deleted time from 5 seconds to a minute. Link: https://lore.kernel.org/r/20200414023925.273867-1-tytso@xxxxxxx Google-Bug-Id: 36602237 Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index f95ee99091e4c..eab18b7b56e77 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -663,7 +663,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent, * block has been written back to disk. (Yes, these values are * somewhat arbitrary...) */ -#define RECENTCY_MIN 5 +#define RECENTCY_MIN 60 #define RECENTCY_DIRTY 300 static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino)