wireguard-linux, branch devel

wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit

2026-04-14T15:33:39Z

wg_netns_pre_exit() manually acquires rtnl_lock() inside the pernet .pre_exit callback. This causes a hung task when another thread holds rtnl_mutex - the cleanup_net workqueue (or the setup_net failure rollback path) blocks indefinitely in wg_netns_pre_exit() waiting to acquire the lock. Convert to .exit_rtnl, introduced in commit 7a60d91c690b ("net: Add ->exit_rtnl() hook to struct pernet_operations."), where the framework already holds RTNL and batches all callbacks under a single rtnl_lock()/rtnl_unlock() pair, eliminating the contention window. The rcu_assign_pointer(wg->creating_net, NULL) is safe to move from .pre_exit to .exit_rtnl (which runs after synchronize_rcu()) because all RCU readers of creating_net either use maybe_get_net() - which returns NULL for a dying namespace with zero refcount - or access net->user_ns which remains valid throughout the entire ops_undo_list sequence. Reported-by: syzbot+f2fbf7478a35a94c8b7c@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?id=cb64c22a492202ca929e18262fdb8cb89e635c70 Signed-off-by: Shardul Bankar [ Jason: added __net_exit and __read_mostly annotations that were missing. ] Fixes: 900575aa33a3 ("wireguard: device: avoid circular netns references") Cc: stable@vger.kernel.org Signed-off-by: Jason A. Donenfeld

wireguard: allowedips: remove redundant space in comment

2026-04-14T15:33:39Z

Not a contentful commit, but amusingly found when porting ba3d7b93 to Windows. Signed-off-by: Jason A. Donenfeld

tools: ynl: add sample for wireguard

2026-04-14T15:33:39Z

Add a sample application for WireGuard, using the generated C library. The main benefit of this is to exercise the generated library, which might be useful for future self-tests. Example: $ make -C tools/net/ynl/lib $ make -C tools/net/ynl/generated $ make -C tools/net/ynl/samples wireguard $ ./tools/net/ynl/samples/wireguard usage: ./tools/net/ynl/samples/wireguard $ sudo ./tools/net/ynl/samples/wireguard wg-test Interface 3: wg-test Peer 6adfb183a4a2c94a2f92dab5ade762a4788[...]: Data: rx: 42 / tx: 42 bytes Allowed IPs: 0.0.0.0/0 ::/0 Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: allowedips: Use kfree_rcu() instead of call_rcu()

2026-04-14T15:33:39Z

Replace call_rcu() + kmem_cache_free() with kfree_rcu() to simplify the code and reduce function size. Signed-off-by: Fushuai Wang Reviewed-by: Simon Horman Signed-off-by: Jason A. Donenfeld

net: airoha: Remove PCE_MC_EN_MASK bit in REG_FE_PCE_CFG configuration

2026-04-14T00:01:23Z

PCE_MC_EN_MASK bit in REG_FE_PCE_CFG configuration performed in airoha_fe_init() is used to duplicate multicast packets and send a copy to the CPU when the traffic is offloaded. This is necessary just if it is requested by the user. Disable multicast packets duplication by default. Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260412-airoha_fe_init_remove_mc_en_bit-v1-1-7b6a5a25a74d@kernel.org Signed-off-by: Jakub Kicinski

Merge branch 'net-airoha-preliminary-series-to-support-multiple-net_devices-connected-to-the-same-gdm-port'

2026-04-13T23:48:40Z

Lorenzo Bianconi says: ==================== net: airoha: Preliminary series to support multiple net_devices connected to the same GDM port EN7581 or AN7583 SoCs support connecting multiple external SerDes (e.g. Ethernet or USB SerDes) to GDM3 or GDM4 ports via a hw arbiter that manages the traffic in a TDM manner. This series introduces some preliminary changes necessary to introduce support for multiple net_devices connected to the same Frame Engine (FE) GDM port (GDM3 or GDM4). ==================== Link: https://patch.msgid.link/20260412-airoha-multi-serdes-preliminary-patch-v1-0-08d5b670ca8f@kernel.org Signed-off-by: Jakub Kicinski

net: airoha: Rely on net_device pointer in ETS callbacks

2026-04-13T23:48:38Z

Remove airoha_gdm_port dependency in ETS tc callback signatures and rely on net_device pointer instead. Please note this patch does not introduce any logical change and it is a preliminary patch in order to support multiple net_devices connected to the same GDM3 or GDM4 port via an external hw arbiter. Tested-by: Xuegang Lu Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260412-airoha-multi-serdes-preliminary-patch-v1-3-08d5b670ca8f@kernel.org Signed-off-by: Jakub Kicinski

net: airoha: Rely on net_device pointer in HTB callbacks

2026-04-13T23:48:38Z

Remove airoha_gdm_port dependency in HTB tc callback signatures and rely on net_device pointer instead. Please note this patch does not introduce any logical change and it is a preliminary patch in order to support multiple net_devices connected to the same GDM3 or GDM4 port via an external hw arbiter. Tested-by: Xuegang Lu Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260412-airoha-multi-serdes-preliminary-patch-v1-2-08d5b670ca8f@kernel.org Signed-off-by: Jakub Kicinski

net: airoha: Rely on net_device pointer in airoha_dev_setup_tc_block signature

2026-04-13T23:48:38Z

Remove airoha_gdm_port dependency in airoha_dev_setup_tc_block routine signature and rely on net_device pointer instead. Please note this patch does not introduce any logical change and it is a preliminary patch to support multiple net_devices connected to the GDM3 or GDM4 ports via an external hw arbiter. Tested-by: Xuegang Lu Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260412-airoha-multi-serdes-preliminary-patch-v1-1-08d5b670ca8f@kernel.org Signed-off-by: Jakub Kicinski

Merge branch 'net-dsa-mxl862xx-add-statistics-support'

2026-04-13T23:46:47Z

Daniel Golle says: ==================== net: dsa: mxl862xx: add statistics support Add per-port RMON statistics support for the MxL862xx DSA driver, covering hardware-specific ethtool -S counters, standard IEEE 802.3 MAC/ctrl/pause statistics, and rtnl_link_stats64 via polled 64-bit accumulation. ==================== Link: https://patch.msgid.link/cover.1775951347.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski