KEYS: user: Align the payload buffer
Align the payload of "user" and "logon" keys so that users of the
keyrings service can access it as a struct that requires more than
2-byte alignment. fscrypt currently does this which results in the read
of fscrypt_key::size being misaligned as it needs 4-byte alignment.
Align to __alignof__(u64) rather than __alignof__(long) since in the
future it's conceivable that people would use structs beginning with
u64, which on some platforms would require more than 'long' alignment.
Reported-by: Aaro Koskinen <aaro.koskinen at iki.fi>
Fixes: 2aa349f6e37c ("[PATCH] Keys: Export user-defined keyring operations")
Fixes: 88bd6ccdcdd6 ("ext4 crypto: add encryption key management facilities")
Cc: stable at vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers at google.com>
Tested-by: Aaro Koskinen <aaro.koskinen at iki.fi>
Signed-off-by: David Howells <dhowells at redhat.com>
Signed-off-by: James Morris <james.morris at microsoft.com>
UnifiedSplitRaw
