This is a note to let you know that I've just added the patch titled

staging: gdm724x: fix use after free in gdm_lte_rx()

to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From fc7f750dc9d102c1ed7bbe4591f991e770c99033 Mon Sep 17 00:00:00 2001 From: Dan Carpenter dan.carpenter@oracle.com Date: Mon, 28 Feb 2022 10:43:31 +0300 Subject: staging: gdm724x: fix use after free in gdm_lte_rx()

The netif_rx_ni() function frees the skb so we can't dereference it to save the skb->len.

Fixes: 61e121047645 ("staging: gdm7240: adding LTE USB driver") Cc: stable stable@vger.kernel.org Reported-by: kernel test robot lkp@intel.com Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Link: https://lore.kernel.org/r/20220228074331.GA13685@kili Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/gdm724x/gdm_lte.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/gdm724x/gdm_lte.c b/drivers/staging/gdm724x/gdm_lte.c index 493ed4821515..0d8d8fed283d 100644 --- a/drivers/staging/gdm724x/gdm_lte.c +++ b/drivers/staging/gdm724x/gdm_lte.c @@ -76,14 +76,15 @@ static void tx_complete(void *arg)

static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type) { - int ret; + int ret, len;

+ len = skb->len + ETH_HLEN; ret = netif_rx_ni(skb); if (ret == NET_RX_DROP) { nic->stats.rx_dropped++; } else { nic->stats.rx_packets++; - nic->stats.rx_bytes += skb->len + ETH_HLEN; + nic->stats.rx_bytes += len; }

return 0;