Backport some fscrypt fixes from upstream 5.2 to 4.19-stable.
This is needed to get 'kvm-xfstests -c ext4,f2fs,ubifs -g encrypt' to
fully pass on 4.19-stable. Before, generic/397 and generic/429 failed
on UBIFS due to missing "fscrypt: fix race where ->lookup() marks
plaintext dentry as ciphertext".
This also fixes some bugs that aren't yet covered by the xfstests.
E.g., "fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing
directory" fixes a bug that caused real-world problems on Chrome OS.
Some relatively straightforward adjustments were needed to the patches,
mainly due to the refactoring of fscrypt.h that was done in 5.1.
Eric Biggers (5):
fscrypt: clean up and improve dentry revalidation
fscrypt: fix race allowing rename() and link() of ciphertext dentries
fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
fscrypt: only set dentry_operations on ciphertext dentries
fscrypt: fix race where ->lookup() marks plaintext dentry as
ciphertext
fs/crypto/crypto.c | 58 +++++++++++++------------
fs/crypto/fname.c | 1 +
fs/crypto/hooks.c | 28 ++++++++----
fs/dcache.c | 15 +++++++
fs/ext4/ext4.h | 62 ++++++++++++++++++++-------
fs/ext4/namei.c | 76 ++++++++++++++++++++++-----------
fs/f2fs/namei.c | 17 +++++---
fs/ubifs/dir.c | 8 ++--
include/linux/dcache.h | 2 +-
include/linux/fscrypt.h | 30 +++++++------
include/linux/fscrypt_notsupp.h | 9 ++--
include/linux/fscrypt_supp.h | 6 ++-
12 files changed, 205 insertions(+), 107 deletions(-)
--
2.29.1
