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| author | Eric Biggers <ebiggers@google.com> | 2022-11-06 14:48:35 -0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-12-08 21:49:24 -0500 |
| commit | 0fbcb5251fc81b58969b272c4fb7374a7b922e3e (patch) | |
| tree | d6ffe34937a6405d44b1890cde6478ec0344e278 /fs/ext4/fast_commit.h | |
| parent | a71248b1accb2b42e4980afef4fa4a27fa0e36f5 (diff) | |
| download | linux-0fbcb5251fc81b58969b272c4fb7374a7b922e3e.tar.gz linux-0fbcb5251fc81b58969b272c4fb7374a7b922e3e.tar.bz2 linux-0fbcb5251fc81b58969b272c4fb7374a7b922e3e.zip | |
ext4: disable fast-commit of encrypted dir operations
fast-commit of create, link, and unlink operations in encrypted
directories is completely broken because the unencrypted filenames are
being written to the fast-commit journal instead of the encrypted
filenames. These operations can't be replayed, as encryption keys
aren't present at journal replay time. It is also an information leak.
Until if/when we can get this working properly, make encrypted directory
operations ineligible for fast-commit.
Note that fast-commit operations on encrypted regular files continue to
be allowed, as they seem to work.
Fixes: aa75f4d3daae ("ext4: main fast-commit commit path")
Cc: <stable@vger.kernel.org> # v5.10+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20221106224841.279231-2-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/fast_commit.h')
| -rw-r--r-- | fs/ext4/fast_commit.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/fast_commit.h b/fs/ext4/fast_commit.h index a6154c3ed135..256f2ad27204 100644 --- a/fs/ext4/fast_commit.h +++ b/fs/ext4/fast_commit.h @@ -96,6 +96,7 @@ enum { EXT4_FC_REASON_RENAME_DIR, EXT4_FC_REASON_FALLOC_RANGE, EXT4_FC_REASON_INODE_JOURNAL_DATA, + EXT4_FC_REASON_ENCRYPTED_FILENAME, EXT4_FC_REASON_MAX }; |