net: stmmac: clear stale buf->page after recycling on skb build failure

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: clear stale buf->page after recycling on skb build failure In stmmac_rx(), when napi_build_skb() fails the descriptor page is recycled back to the page pool with page_pool_recycle_direct(), but buf->page is left pointing at the recycled page, unlike every other consumption site in the function which clears the pointer after handing the page away. With the stale pointer stmmac_rx_refill() skips the replacement allocation and programs the already-recycled page back into the RX descriptor. Clear buf->page on the napi_build_skb() failure path to keep the buffer lifecycle consistent with the other consumption sites.

Source published

18 Oct 2026 15:18:37 UTC

Source modified

19 Oct 2026 09:21:56 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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