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| author | Jesper Juhl <jj@chaosbits.net> | 2012-08-17 10:33:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-20 02:47:49 -0700 |
| commit | d92c7f8aabae913de16eb855b19cd2002c341896 (patch) | |
| tree | dea18b0f4fb3e83a6ed87a8a1e23eb0cbb17aa0e /net | |
| parent | 6c71bec66ae65305ba5c33c93aa722f21f092737 (diff) | |
| download | linux-d92c7f8aabae913de16eb855b19cd2002c341896.tar.gz linux-d92c7f8aabae913de16eb855b19cd2002c341896.tar.bz2 linux-d92c7f8aabae913de16eb855b19cd2002c341896.zip | |
caif: Do not dereference NULL in chnl_recv_cb()
In net/caif/chnl_net.c::chnl_recv_cb() we call skb_header_pointer()
which may return NULL, but we do not check for a NULL pointer before
dereferencing it.
This patch adds such a NULL check and properly free's allocated memory
and return an error (-EINVAL) on failure - much better than crashing..
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/caif/chnl_net.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c index 69771c04ba8f..e597733affb8 100644 --- a/net/caif/chnl_net.c +++ b/net/caif/chnl_net.c @@ -94,6 +94,10 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt) /* check the version of IP */ ip_version = skb_header_pointer(skb, 0, 1, &buf); + if (!ip_version) { + kfree_skb(skb); + return -EINVAL; + } switch (*ip_version >> 4) { case 4: |