kernel/linux.git/drivers/net/ethernet/mediatek, branch v7.1

net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown

2026-06-04T02:15:32+00:00

mtk_free_dev() calls metadata_dst_free() which frees the metadata_dst with kfree() immediately, bypassing the RCU grace period. In the RX path, skb_dst_set_noref() sets a non-refcounted pointer from the skb to the metadata_dst. This function requires RCU read-side protection and the dst must remain valid until all RCU readers complete. Since metadata_dst_free() calls kfree() directly, a use-after-free can occur if any skb still holds a noref pointer to the dst when the driver tears it down. Replace metadata_dst_free() with dst_release() which properly goes through the refcount path: when the refcount drops to zero, it schedules the actual free via call_rcu_hurry(), ensuring all RCU readers have completed before the memory is freed. Fixes: 2d7605a72906 ("net: ethernet: mtk_eth_soc: enable hardware DSA untagging") Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260602-airoha-mtk-metadata-uaf-fix-v1-2-3aaa99d83351@kernel.org Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-04-14T19:04:00+00:00

Merge in late fixes in preparation for the net-next PR. Conflicts: include/net/sch_generic.h a6bd339dbb351 ("net_sched: fix skb memory leak in deferred qdisc drops") ff2998f29f390 ("net: sched: introduce qdisc-specific drop reason tracing") https://lore.kernel.org/adz0iX85FHMz0HdO@sirena.org.uk drivers/net/ethernet/airoha/airoha_eth.c 1acdfbdb516b ("net: airoha: Fix VIP configuration for AN7583 SoC") bf3471e6e6c0 ("net: airoha: Make flow control source port mapping dependent on nbq parameter") Adjacent changes: drivers/net/ethernet/airoha/airoha_ppe.c f44218cd5e6a ("net: airoha: Reset PPE cpu port configuration in airoha_ppe_hw_init()") 7da62262ec96 ("inet: add ip_local_port_step_width sysctl to improve port usage distribution") Signed-off-by: Jakub Kicinski

net: ethernet: mtk_eth_soc: initialize PPE per-tag-layer MTU registers

2026-04-12T22:22:58+00:00

The PPE enforces output frame size limits via per-tag-layer VLAN_MTU registers that the driver never initializes. The hardware defaults do not account for PPPoE overhead, causing the PPE to punt encapsulated frames back to the CPU instead of forwarding them. Initialize the registers at PPE start and on MTU changes using the maximum GMAC MTU. This is a conservative approximation -- the actual per-PPE requirement depends on egress path, but using the global maximum ensures the limits are never too small. Fixes: ba37b7caf1ed2 ("net: ethernet: mtk_eth_soc: add support for initializing the PPE") Signed-off-by: Daniel Golle Link: https://patch.msgid.link/ec995ab8ce8be423267a1cc093147a74d2eb9d82.1775789829.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-04-02T18:03:13+00:00

Cross-merge networking fixes after downstream PR (net-7.0-rc7). Conflicts: net/vmw_vsock/af_vsock.c b18c83388874 ("vsock: initialize child_ns_mode_locked in vsock_net_init()") 0de607dc4fd8 ("vsock: add G2H fallback for CIDs not owned by H2G transport") Adjacent changes: drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c ceee35e5674a ("bnxt_en: Refactor some basic ring setup and adjustment logic") 57cdfe0dc70b ("bnxt_en: Resize RSS contexts on channel count change") drivers/net/wireless/intel/iwlwifi/mld/mac80211.c 4d56037a02bd ("wifi: iwlwifi: mld: block EMLSR during TDLS connections") 687a95d204e7 ("wifi: iwlwifi: mld: correctly set wifi generation data") drivers/net/wireless/intel/iwlwifi/mld/scan.h b6045c899e37 ("wifi: iwlwifi: mld: Refactor scan command handling") ec66ec6a5a8f ("wifi: iwlwifi: mld: Fix MLO scan timing") drivers/net/wireless/intel/iwlwifi/mvm/fw.c 078df640ef05 ("wifi: iwlwifi: mld: add support for iwl_mcc_allowed_ap_type_cmd v 2") 323156c3541e ("wifi: iwlwifi: mvm: don't send a 6E related command when not supported") Signed-off-by: Jakub Kicinski

net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled

2026-03-27T02:01:25+00:00

If the gmac0 is disabled, the precheck for a valid ingress device will cause a NULL pointer deref and crash the system. This happens because eth->netdev[0] will be NULL but the code will directly try to access netdev_ops. Instead of just checking for the first net_device, it must be checked if any of the mtk_eth net_devices is matching the netdev_ops of the ingress device. Cc: stable@vger.kernel.org Fixes: 73cfd947dbdb ("net: ethernet: mtk_eth_soc: ppe: prevent ppe update for non-mtk devices") Signed-off-by: Sven Eckelmann (Plasma Cloud) Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260324-wed-crash-gmac0-disabled-v1-1-3bc388aee565@simonwunderlich.de Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-03-05T20:11:05+00:00

Cross-merge networking fixes after downstream PR (net-7.0-rc3). No conflicts. Adjacent changes: net/netfilter/nft_set_rbtree.c fb7fb4016300 ("netfilter: nf_tables: clone set on flush only") 3aea466a4399 ("netfilter: nft_set_rbtree: don't disable bh when acquiring tree lock") Signed-off-by: Jakub Kicinski

net: ethernet: mtk_eth_soc: Reset prog ptr to old_prog in case of error in mtk_xdp_setup()

2026-03-05T14:39:51+00:00

Reset eBPF program pointer to old_prog and do not decrease its ref-count if mtk_open routine in mtk_xdp_setup() fails. Fixes: 7c26c20da5d42 ("net: ethernet: mtk_eth_soc: add basic XDP support") Suggested-by: Paolo Valerio Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260303-mtk-xdp-prog-ptr-fix-v2-1-97b6dbbe240f@kernel.org Signed-off-by: Paolo Abeni

net: ethernet: mtk_eth_soc: avoid writing to ESW registers on MT7628

2026-02-28T02:36:21+00:00

The MT7628 has a fixed-link PHY and does not expose MAC control registers. Writes to these registers only corrupt the ESW VLAN configuration. This patch explicitly registers no-op phylink_mac_ops for MT7628, as after removing the invalid register accesses, the existing phylink_mac_ops effectively become no-ops. This code was introduced by commit 296c9120752b ("net: ethernet: mediatek: Add MT7628/88 SoC support") Signed-off-by: Joris Vaisvila Reviewed-by: Daniel Golle Reviewed-by: Stefan Roese Link: https://patch.msgid.link/20260226154547.68553-1-joey@tinyisr.com Signed-off-by: Jakub Kicinski

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook