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| author | Eric Biggers <ebiggers@google.com> | 2019-02-20 13:32:11 +0000 |
|---|---|---|
| committer | James Morris <james.morris@microsoft.com> | 2019-02-22 10:11:19 -0800 |
| commit | cc1780fc42c76c705dd07ea123f1143dc5057630 (patch) | |
| tree | ff2e1456a944817b402de9f9c10faa78f1313bfc /include/keys | |
| parent | 8a61716ff2ab23eddd1f7a05a075a374e4d0c3d4 (diff) | |
| download | lwn-cc1780fc42c76c705dd07ea123f1143dc5057630.tar.gz lwn-cc1780fc42c76c705dd07ea123f1143dc5057630.zip | |
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@iki.fi>
Fixes: 2aa349f6e37c ("[PATCH] Keys: Export user-defined keyring operations")
Fixes: 88bd6ccdcdd6 ("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>
Diffstat (limited to 'include/keys')
| -rw-r--r-- | include/keys/user-type.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/keys/user-type.h b/include/keys/user-type.h index e098cbe27db5..12babe991594 100644 --- a/include/keys/user-type.h +++ b/include/keys/user-type.h @@ -31,7 +31,7 @@ struct user_key_payload { struct rcu_head rcu; /* RCU destructor */ unsigned short datalen; /* length of this data */ - char data[0]; /* actual data */ + char data[0] __aligned(__alignof__(u64)); /* actual data */ }; extern struct key_type key_type_user; |