diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-11-03 23:04:51 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-11-07 04:24:37 +0300 |
| commit | 115c0f4d58574524ed7fbbcce1b0a86aa5249db1 (patch) | |
| tree | bed19fcf7954e8fef8565283e3a6632952fd31e8 /drivers | |
| parent | 9fc3bc7643341dc5be7d269f3d3dbe441d8d7ac3 (diff) | |
| download | linux-115c0f4d58574524ed7fbbcce1b0a86aa5249db1.tar.xz | |
idpf: fix potential use-after-free in idpf_tso()
skb_cow_head() can change skb->head (and thus skb_shinfo(skb))
We must not cache skb_shinfo(skb) before skb_cow_head().
Fixes: 6818c4d5b3c2 ("idpf: add splitq start_xmit")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Joshua Hay <joshua.a.hay@intel.com>
Cc: Alan Brady <alan.brady@intel.com>
Cc: Madhu Chittim <madhu.chittim@intel.com>
Cc: Phani Burra <phani.r.burra@intel.com>
Cc: Sridhar Samudrala <sridhar.samudrala@intel.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: Bailey Forrest <bcf@google.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231103200451.514047-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/intel/idpf/idpf_txrx.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.c b/drivers/net/ethernet/intel/idpf/idpf_txrx.c index 5e1ef70d54fe..1f728a9004d9 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_txrx.c +++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.c @@ -2365,7 +2365,7 @@ static void idpf_tx_splitq_map(struct idpf_queue *tx_q, */ int idpf_tso(struct sk_buff *skb, struct idpf_tx_offload_params *off) { - const struct skb_shared_info *shinfo = skb_shinfo(skb); + const struct skb_shared_info *shinfo; union { struct iphdr *v4; struct ipv6hdr *v6; @@ -2379,13 +2379,15 @@ int idpf_tso(struct sk_buff *skb, struct idpf_tx_offload_params *off) u32 paylen, l4_start; int err; - if (!shinfo->gso_size) + if (!skb_is_gso(skb)) return 0; err = skb_cow_head(skb, 0); if (err < 0) return err; + shinfo = skb_shinfo(skb); + ip.hdr = skb_network_header(skb); l4.hdr = skb_transport_header(skb); |