6.11-stable review patch. If anyone has any objections, please let me know.
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From: Jinjie Ruan ruanjinjie@huawei.com
commit 3b557be89fc688dbd9ccf704a70f7600a094f13a upstream.
The error path in t7xx_dpmaif_rx_buf_alloc(), free and unmap the already allocated and mapped skb in a loop, but the loop condition terminates when the index reaches zero, which fails to free the first allocated skb at index zero.
Check with i-- so that skb at index 0 is freed as well.
Cc: stable@vger.kernel.org Fixes: d642b012df70 ("net: wwan: t7xx: Add data path interface") Acked-by: Sergey Ryazanov ryazanov.s.a@gmail.com Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Link: https://patch.msgid.link/20241101025316.3234023-1-ruanjinjie@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c +++ b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c @@ -226,7 +226,7 @@ int t7xx_dpmaif_rx_buf_alloc(struct dpma return 0;
err_unmap_skbs: - while (--i > 0) + while (i--) t7xx_unmap_bat_skb(dpmaif_ctrl->dev, bat_req->bat_skb, i);
return ret;