This is a note to let you know that I've just added the patch titled
ext4: disallow modifying DAX inode flag if inline_data has been set
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:
ext4-disallow-modifying-dax-inode-flag-if-inline_dat.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 4bd47989493b1dd955dc018f29ddff2551786cf7
Author: Xiao Yang <yangx.jy@xxxxxxxxxxxxxx>
Date: Fri Aug 28 16:43:30 2020 +0800
ext4: disallow modifying DAX inode flag if inline_data has been set
[ Upstream commit aa2f77920b743c44e02e2dc8474bbf8bd30007a2 ]
inline_data is mutually exclusive to DAX so enabling both of them triggers
the following issue:
------------------------------------------
# mkfs.ext4 -F -O inline_data /dev/pmem1
...
# mount /dev/pmem1 /mnt
# echo 'test' >/mnt/file
# lsattr -l /mnt/file
/mnt/file Inline_Data
# xfs_io -c "chattr +x" /mnt/file
# xfs_io -c "lsattr -v" /mnt/file
[dax] /mnt/file
# umount /mnt
# mount /dev/pmem1 /mnt
# cat /mnt/file
cat: /mnt/file: Numerical result out of range
------------------------------------------
Fixes: b383a73f2b83 ("fs/ext4: Introduce DAX inode flag")
Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Reviewed-by: Andreas Dilger <adilger@xxxxxxxxx>
Link: https://lore.kernel.org/r/20200828084330.15776-1-yangx.jy@xxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 523e00d7b3924..69187b6205b2b 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -492,7 +492,7 @@ struct flex_groups {
/* Flags which are mutually exclusive to DAX */
#define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\
- EXT4_JOURNAL_DATA_FL)
+ EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL)
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
