diff options
author | David S. Miller <davem@davemloft.net> | 2008-06-21 01:04:34 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-06-21 01:04:34 -0400 |
commit | 735ce972fbc8a65fb17788debd7bbe7b4383cc62 (patch) | |
tree | b047160a720011021b148350e42d8cc020f06a61 /net | |
parent | 2645a3c3761ac25498db2e627271016c849c68e1 (diff) |
sctp: Make sure N * sizeof(union sctp_addr) does not overflow.
As noticed by Gabriel Campana, the kmalloc() length arg
passed in by sctp_getsockopt_local_addrs_old() can overflow
if ->addr_num is large enough.
Therefore, enforce an appropriate limit.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/sctp/socket.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index e7e3baf7009..0dbcde6758e 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c | |||
@@ -4401,7 +4401,9 @@ static int sctp_getsockopt_local_addrs_old(struct sock *sk, int len, | |||
4401 | if (copy_from_user(&getaddrs, optval, len)) | 4401 | if (copy_from_user(&getaddrs, optval, len)) |
4402 | return -EFAULT; | 4402 | return -EFAULT; |
4403 | 4403 | ||
4404 | if (getaddrs.addr_num <= 0) return -EINVAL; | 4404 | if (getaddrs.addr_num <= 0 || |
4405 | getaddrs.addr_num >= (INT_MAX / sizeof(union sctp_addr))) | ||
4406 | return -EINVAL; | ||
4405 | /* | 4407 | /* |
4406 | * For UDP-style sockets, id specifies the association to query. | 4408 | * For UDP-style sockets, id specifies the association to query. |
4407 | * If the id field is set to the value '0' then the locally bound | 4409 | * If the id field is set to the value '0' then the locally bound |