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commitcc1780fc42upstream. 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@iki.fi> Fixes:2aa349f6e3("[PATCH] Keys: Export user-defined keyring operations") Fixes:88bd6ccdcd("ext4 crypto: add encryption key management facilities") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.morris@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>