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| author | Tobias Klauser <tklauser@distanz.ch> | 2015-11-04 13:49:49 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-04 21:59:22 -0500 |
| commit | f63ce5b6fa5e9a0faf7a0e1ef2993a502878c78a (patch) | |
| tree | 6a6a060254017f2bcdbab98ee66dd94fcfe6eae9 | |
| parent | e7868a85e1b26bcb2e71088841eec1d310a97ac9 (diff) | |
| download | linux-f63ce5b6fa5e9a0faf7a0e1ef2993a502878c78a.tar.bz2 | |
tun_dst: Fix potential NULL dereference
In tun_dst_unclone() the return value of skb_metadata_dst() is checked
for being NULL after it is dereferenced. Fix this by moving the
dereference after the NULL check.
Found by the Coverity scanner (CID 1338068).
Fixes: fc4099f17240 ("openvswitch: Fix egress tunnel info.")
Cc: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/dst_metadata.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h index ce009710120c..6816f0fa5693 100644 --- a/include/net/dst_metadata.h +++ b/include/net/dst_metadata.h @@ -63,12 +63,13 @@ static inline struct metadata_dst *tun_rx_dst(int md_size) static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb) { struct metadata_dst *md_dst = skb_metadata_dst(skb); - int md_size = md_dst->u.tun_info.options_len; + int md_size; struct metadata_dst *new_md; if (!md_dst) return ERR_PTR(-EINVAL); + md_size = md_dst->u.tun_info.options_len; new_md = metadata_dst_alloc(md_size, GFP_ATOMIC); if (!new_md) return ERR_PTR(-ENOMEM); |