This is a note to let you know that I've just added the patch titled net: mvneta: fix possible memory leak in mvneta_swbm_add_rx_fragment to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-mvneta-fix-possible-memory-leak-in-mvneta_swbm_add_rx_fragment.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Sun Nov 22 10:24:41 AM CET 2020 From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx> Date: Fri, 13 Nov 2020 19:16:57 +0100 Subject: net: mvneta: fix possible memory leak in mvneta_swbm_add_rx_fragment From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx> [ Upstream commit 9c79a8ab5f124db01eb1d7287454a702f0d4252f ] Recycle the page running page_pool_put_full_page() in mvneta_swbm_add_rx_fragment routine when the last descriptor contains just the FCS or if the received packet contains more than MAX_SKB_FRAGS fragments Fixes: ca0e014609f0 ("net: mvneta: move skb build after descriptors processing") Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx> Link: https://lore.kernel.org/r/df6a2bad70323ee58d3901491ada31c1ca2a40b9.1605291228.git.lorenzo@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/marvell/mvneta.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -2287,6 +2287,7 @@ mvneta_swbm_add_rx_fragment(struct mvnet dma_sync_single_for_cpu(dev->dev.parent, rx_desc->buf_phys_addr, len, dma_dir); + rx_desc->buf_phys_addr = 0; if (data_len > 0 && sinfo->nr_frags < MAX_SKB_FRAGS) { skb_frag_t *frag = &sinfo->frags[sinfo->nr_frags]; @@ -2295,8 +2296,8 @@ mvneta_swbm_add_rx_fragment(struct mvnet skb_frag_size_set(frag, data_len); __skb_frag_set_page(frag, page); sinfo->nr_frags++; - - rx_desc->buf_phys_addr = 0; + } else { + page_pool_put_full_page(rxq->page_pool, page, true); } *size -= len; } Patches currently in stable-queue which might be from lorenzo@xxxxxxxxxx are queue-5.9/net-mvneta-fix-possible-memory-leak-in-mvneta_swbm_add_rx_fragment.patch