diff options
| author | David S. Miller <davem@davemloft.net> | 2017-11-04 09:26:51 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-04 09:26:51 +0900 |
| commit | 2a171788ba7bb61995e98e8163204fc7880f63b2 (patch) | |
| tree | 4150a94dd08323748116e5051e56ddee830d4812 /security/keys/trusted.c | |
| parent | bf5345882bd18bc1b4966d170c0491ebe5c9a7d6 (diff) | |
| parent | d4c2e9fca5b7db8d315d93a072e65d0847f8e0c5 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Files removed in 'net-next' had their license header updated
in 'net'. We take the remove from 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security/keys/trusted.c')
| -rw-r--r-- | security/keys/trusted.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/security/keys/trusted.c b/security/keys/trusted.c index bd85315cbfeb..98aa89ff7bfd 100644 --- a/security/keys/trusted.c +++ b/security/keys/trusted.c @@ -1147,20 +1147,21 @@ static long trusted_read(const struct key *key, char __user *buffer, p = dereference_key_locked(key); if (!p) return -EINVAL; - if (!buffer || buflen <= 0) - return 2 * p->blob_len; - ascii_buf = kmalloc(2 * p->blob_len, GFP_KERNEL); - if (!ascii_buf) - return -ENOMEM; - bufp = ascii_buf; - for (i = 0; i < p->blob_len; i++) - bufp = hex_byte_pack(bufp, p->blob[i]); - if ((copy_to_user(buffer, ascii_buf, 2 * p->blob_len)) != 0) { + if (buffer && buflen >= 2 * p->blob_len) { + ascii_buf = kmalloc(2 * p->blob_len, GFP_KERNEL); + if (!ascii_buf) + return -ENOMEM; + + bufp = ascii_buf; + for (i = 0; i < p->blob_len; i++) + bufp = hex_byte_pack(bufp, p->blob[i]); + if (copy_to_user(buffer, ascii_buf, 2 * p->blob_len) != 0) { + kzfree(ascii_buf); + return -EFAULT; + } kzfree(ascii_buf); - return -EFAULT; } - kzfree(ascii_buf); return 2 * p->blob_len; } |