* [PATCH v2 net-next] net: dm9051: Fix use after free in dm9051_loop_tx()
@ 2022-02-21 10:54 Dan Carpenter
2022-02-22 5:00 ` patchwork-bot+netdevbpf
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2022-02-21 10:54 UTC (permalink / raw)
To: David S. Miller, Joseph CHAMG
Cc: Jakub Kicinski, Joseph CHAMG, netdev, kernel-janitors
This code dereferences "skb" after calling dev_kfree_skb().
Fixes: 2dc95a4d30ed ("net: Add dm9051 driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
v2: Only record successful transfers
drivers/net/ethernet/davicom/dm9051.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/davicom/dm9051.c b/drivers/net/ethernet/davicom/dm9051.c
index a63d17e669a0..20cdca06d267 100644
--- a/drivers/net/ethernet/davicom/dm9051.c
+++ b/drivers/net/ethernet/davicom/dm9051.c
@@ -845,17 +845,19 @@ static int dm9051_loop_tx(struct board_info *db)
while (!skb_queue_empty(&db->txq)) {
struct sk_buff *skb;
+ unsigned int len;
skb = skb_dequeue(&db->txq);
if (skb) {
ntx++;
ret = dm9051_single_tx(db, skb->data, skb->len);
+ len = skb->len;
dev_kfree_skb(skb);
if (ret < 0) {
db->bc.tx_err_counter++;
return 0;
}
- ndev->stats.tx_bytes += skb->len;
+ ndev->stats.tx_bytes += len;
ndev->stats.tx_packets++;
}
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2 net-next] net: dm9051: Fix use after free in dm9051_loop_tx()
2022-02-21 10:54 [PATCH v2 net-next] net: dm9051: Fix use after free in dm9051_loop_tx() Dan Carpenter
@ 2022-02-22 5:00 ` patchwork-bot+netdevbpf
0 siblings, 0 replies; 2+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-02-22 5:00 UTC (permalink / raw)
To: Dan Carpenter; +Cc: davem, josright123, kuba, netdev, kernel-janitors
Hello:
This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:
On Mon, 21 Feb 2022 13:54:40 +0300 you wrote:
> This code dereferences "skb" after calling dev_kfree_skb().
>
> Fixes: 2dc95a4d30ed ("net: Add dm9051 driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> v2: Only record successful transfers
>
> [...]
Here is the summary with links:
- [v2,net-next] net: dm9051: Fix use after free in dm9051_loop_tx()
https://git.kernel.org/netdev/net-next/c/b6553c71813f
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-02-21 10:54 [PATCH v2 net-next] net: dm9051: Fix use after free in dm9051_loop_tx() Dan Carpenter
2022-02-22 5:00 ` patchwork-bot+netdevbpf
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