linux-ext4 - Re: [e2fsprogs PATCH v2] e2fsck: don't allow journal inode to have encrypt flag

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Date:   Wed, 2 Nov 2022 16:48:27 -0600
From:   Andreas Dilger <adilger@...ger.ca>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-ext4@...r.kernel.org, linux-fscrypt@...r.kernel.org
Subject: Re: [e2fsprogs PATCH v2] e2fsck: don't allow journal inode to have
 encrypt flag

On Nov 2, 2022, at 4:05 PM, Eric Biggers <ebiggers@...nel.org> wrote:
> 
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Since the kernel is being fixed to consider journal inodes with the
> 'encrypt' flag set to be invalid, also update e2fsck accordingly.
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>

Looks good.

Reviewed-by: Andreas Dilger <adilger@...ger.ca>

> ---
> 
> v2: generate the test filesystem image dynamically.
> 
> e2fsck/journal.c                   |  3 ++-
> tests/f_badjour_encrypted/expect.1 | 30 ++++++++++++++++++++++++++++++
> tests/f_badjour_encrypted/expect.2 |  7 +++++++
> tests/f_badjour_encrypted/name     |  1 +
> tests/f_badjour_encrypted/script   | 11 +++++++++++
> 5 files changed, 51 insertions(+), 1 deletion(-)
> create mode 100644 tests/f_badjour_encrypted/expect.1
> create mode 100644 tests/f_badjour_encrypted/expect.2
> create mode 100644 tests/f_badjour_encrypted/name
> create mode 100644 tests/f_badjour_encrypted/script
> 
> diff --git a/e2fsck/journal.c b/e2fsck/journal.c
> index d802c5e9..343e48ba 100644
> --- a/e2fsck/journal.c
> +++ b/e2fsck/journal.c
> @@ -1039,7 +1039,8 @@ static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal)
> 			tried_backup_jnl++;
> 		}
> 		if (!j_inode->i_ext2.i_links_count ||
> -		    !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) {
> +		    !LINUX_S_ISREG(j_inode->i_ext2.i_mode) ||
> +		    (j_inode->i_ext2.i_flags & EXT4_ENCRYPT_FL)) {
> 			retval = EXT2_ET_NO_JOURNAL;
> 			goto try_backup_journal;
> 		}
> diff --git a/tests/f_badjour_encrypted/expect.1 b/tests/f_badjour_encrypted/expect.1
> new file mode 100644
> index 00000000..0b13b9eb
> --- /dev/null
> +++ b/tests/f_badjour_encrypted/expect.1
> @@ -0,0 +1,30 @@
> +Superblock has an invalid journal (inode 8).
> +Clear? yes
> +
> +*** journal has been deleted ***
> +
> +Pass 1: Checking inodes, blocks, and sizes
> +Journal inode is not in use, but contains data.  Clear? yes
> +
> +Pass 2: Checking directory structure
> +Pass 3: Checking directory connectivity
> +Pass 4: Checking reference counts
> +Pass 5: Checking group summary information
> +Block bitmap differences:  -(24--25) -(27--41) -(107--1113)
> +Fix? yes
> +
> +Free blocks count wrong for group #0 (934, counted=1958).
> +Fix? yes
> +
> +Free blocks count wrong (934, counted=1958).
> +Fix? yes
> +
> +Recreate journal? yes
> +
> +Creating journal (1024 blocks):  Done.
> +
> +*** journal has been regenerated ***
> +
> +test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
> +test_filesys: 11/256 files (0.0% non-contiguous), 1114/2048 blocks
> +Exit status is 1
> diff --git a/tests/f_badjour_encrypted/expect.2 b/tests/f_badjour_encrypted/expect.2
> new file mode 100644
> index 00000000..76934be2
> --- /dev/null
> +++ b/tests/f_badjour_encrypted/expect.2
> @@ -0,0 +1,7 @@
> +Pass 1: Checking inodes, blocks, and sizes
> +Pass 2: Checking directory structure
> +Pass 3: Checking directory connectivity
> +Pass 4: Checking reference counts
> +Pass 5: Checking group summary information
> +test_filesys: 11/256 files (9.1% non-contiguous), 1114/2048 blocks
> +Exit status is 0
> diff --git a/tests/f_badjour_encrypted/name b/tests/f_badjour_encrypted/name
> new file mode 100644
> index 00000000..e8f4c04f
> --- /dev/null
> +++ b/tests/f_badjour_encrypted/name
> @@ -0,0 +1 @@
> +journal inode has encrypt flag
> diff --git a/tests/f_badjour_encrypted/script b/tests/f_badjour_encrypted/script
> new file mode 100644
> index 00000000..e6778f1d
> --- /dev/null
> +++ b/tests/f_badjour_encrypted/script
> @@ -0,0 +1,11 @@
> +if ! test -x $DEBUGFS_EXE; then
> +	echo "$test_name: $test_description: skipped (no debugfs)"
> +	return 0
> +fi
> +
> +touch $TMPFILE
> +$MKE2FS -t ext4 -b 1024 $TMPFILE 2M
> +$DEBUGFS -w -R 'set_inode_field <8> flags 0x80800' $TMPFILE
> +
> +SKIP_GUNZIP="true"
> +. $cmd_dir/run_e2fsck
> 
> base-commit: aad34909b6648579f42dade5af5b46821aa4d845
> --
> 2.38.1
> 


Cheers, Andreas






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