diff options
Diffstat (limited to 'net/bluetooth/smp.c')
| -rw-r--r-- | net/bluetooth/smp.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 3921cba056d3..4bfaa3d3ed28 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -1271,7 +1271,14 @@ static void smp_distribute_keys(struct smp_chan *smp) __le16 ediv; __le64 rand; - get_random_bytes(enc.ltk, sizeof(enc.ltk)); + /* Make sure we generate only the significant amount of + * bytes based on the encryption key size, and set the rest + * of the value to zeroes. + */ + get_random_bytes(enc.ltk, smp->enc_key_size); + memset(enc.ltk + smp->enc_key_size, 0, + sizeof(enc.ltk) - smp->enc_key_size); + get_random_bytes(&ediv, sizeof(ediv)); get_random_bytes(&rand, sizeof(rand)); |