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| author | Vlad Yasevich | 2008-08-26 00:16:19 +0200 |
|---|---|---|
| committer | David S. Miller | 2008-08-26 00:16:19 +0200 |
| commit | 30c2235cbc477d4629983d440cdc4f496fec9246 (patch) | |
| tree | c280fcf36c472f1a21a58f74a2dc76dbf337859e /net/sctp/auth.c | |
| parent | ipv6: protocol for address routes (diff) | |
| download | kernel-qcow2-linux-30c2235cbc477d4629983d440cdc4f496fec9246.tar.gz kernel-qcow2-linux-30c2235cbc477d4629983d440cdc4f496fec9246.tar.xz kernel-qcow2-linux-30c2235cbc477d4629983d440cdc4f496fec9246.zip | |
sctp: add verification checks to SCTP_AUTH_KEY option
The structure used for SCTP_AUTH_KEY option contains a
length that needs to be verfied to prevent buffer overflow
conditions. Spoted by Eugene Teo <eteo@redhat.com>.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/auth.c')
| -rw-r--r-- | net/sctp/auth.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sctp/auth.c b/net/sctp/auth.c index 675a5c3e68a6..1fcb4cf2f4c9 100644 --- a/net/sctp/auth.c +++ b/net/sctp/auth.c @@ -80,6 +80,10 @@ static struct sctp_auth_bytes *sctp_auth_create_key(__u32 key_len, gfp_t gfp) { struct sctp_auth_bytes *key; + /* Verify that we are not going to overflow INT_MAX */ + if ((INT_MAX - key_len) < sizeof(struct sctp_auth_bytes)) + return NULL; + /* Allocate the shared key */ key = kmalloc(sizeof(struct sctp_auth_bytes) + key_len, gfp); if (!key) |