diff options
| author | Eric Biggers <ebiggers@google.com> | 2023-03-14 01:12:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-30 13:51:35 +0300 |
| commit | 497ab5d9c7852dfedab2c9de75e41b60e54b7c5d (patch) | |
| tree | ea156aa8f3c6238dea1b1a87ebf9de254fa1f7fc /lib/timerqueue.c | |
| parent | e7295b05747f818de4725e1fcefb58d0873c4032 (diff) | |
| download | linux-497ab5d9c7852dfedab2c9de75e41b60e54b7c5d.tar.xz | |
fscrypt: destroy keyring after security_sb_delete()
commit ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a upstream.
fscrypt_destroy_keyring() must be called after all potentially-encrypted
inodes were evicted; otherwise it cannot safely destroy the keyring.
Since inodes that are in-use by the Landlock LSM don't get evicted until
security_sb_delete(), this means that fscrypt_destroy_keyring() must be
called *after* security_sb_delete().
This fixes a WARN_ON followed by a NULL dereference, only possible if
Landlock was being used on encrypted files.
Fixes: d7e7b9af104c ("fscrypt: stop using keyrings subsystem for fscrypt_master_key")
Cc: stable@vger.kernel.org
Reported-by: syzbot+93e495f6a4f748827c88@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/00000000000044651705f6ca1e30@google.com
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230313221231.272498-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/timerqueue.c')
0 files changed, 0 insertions, 0 deletions