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2026-04-28bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()Weiming Shi1-0/+3
bareudp_fill_metadata_dst() passes bareudp->sock to udp_tunnel6_dst_lookup() in the IPv6 path without a NULL check. The socket is only created in bareudp_open() and NULLed in bareudp_stop(), so calling this function while the device is down triggers a NULL dereference via sock->sk. BUG: kernel NULL pointer dereference, address: 0000000000000018 RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160) Call Trace: <TASK> bareudp_fill_metadata_dst (drivers/net/bareudp.c:532) do_execute_actions (net/openvswitch/actions.c:901) ovs_execute_actions (net/openvswitch/actions.c:1589) ovs_packet_cmd_execute (net/openvswitch/datapath.c:700) genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114) genl_rcv_msg (net/netlink/genetlink.c:1209) netlink_rcv_skb (net/netlink/af_netlink.c:2550) </TASK> Add a NULL check returning -ESHUTDOWN, consistent with the xmit paths in the same driver. Fixes: 571912c69f0e ("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.") Reported-by: Xiang Mei <xmei5@asu.edu> Signed-off-by: Weiming Shi <bestswngs@gmail.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260426165350.1663137-2-bestswngs@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-28net: dummy: do not acquire RTNL for too longEric Dumazet1-5/+1
Instead of holding RTNL for an arbitrary amount of time, call register_netdev() for each dummy device created at module loading time. Tested: modprobe dummy numdummies=10000 Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260427091016.737015-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-28net: phy: dp83869: fix setting CLK_O_SEL field.Heiko Schocher1-1/+12
Table 7-121 in datasheet says we have to set register 0xc6 to value 0x10 before CLK_O_SEL can be modified. No more infos about this field found in datasheet. With this fix, setting of CLK_O_SEL field in IO_MUX_CFG register worked through dts property "ti,clk-output-sel" on a DP83869HMRGZR. Signed-off-by: Heiko Schocher <hs@nabladev.com> Reviewed-by: Simon Horman <horms@kernel.org> Fixes: 01db923e8377 ("net: phy: dp83869: Add TI dp83869 phy") Link: https://patch.msgid.link/20260425031339.3318-1-hs@nabladev.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-28net: mctp i2c: check length before marking flow activeWilliam A. Kennington III1-2/+2
Currently, mctp_i2c_get_tx_flow_state() is called before the packet length sanity check. This function marks a new flow as active in the MCTP core. If the sanity check fails, mctp_i2c_xmit() returns early without calling mctp_i2c_lock_nest(). This results in a mismatched locking state: the flow is active, but the I2C bus lock was never acquired for it. When the flow is later released, mctp_i2c_release_flow() will see the active state and queue an unlock marker. The TX thread will then decrement midev->i2c_lock_count from 0, causing it to underflow to -1. This underflow permanently breaks the driver's locking logic, allowing future transmissions to occur without holding the I2C bus lock, leading to bus collisions and potential hardware hangs. Move the mctp_i2c_get_tx_flow_state() call to after the length sanity check to ensure we only transition the flow state if we are actually going to proceed with the transmission and locking. Fixes: f5b8abf9fc3d ("mctp i2c: MCTP I2C binding driver") Signed-off-by: William A. Kennington III <william@wkennington.com> Acked-by: Jeremy Kerr <jk@codeconstruct.com.au> Link: https://patch.msgid.link/20260423074741.201460-1-william@wkennington.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-28net: stmmac: Prevent NULL deref when RX memory exhaustedSam Edwards1-7/+12
The CPU receives frames from the MAC through conventional DMA: the CPU allocates buffers for the MAC, then the MAC fills them and returns ownership to the CPU. For each hardware RX queue, the CPU and MAC coordinate through a shared ring array of DMA descriptors: one descriptor per DMA buffer. Each descriptor includes the buffer's physical address and a status flag ("OWN") indicating which side owns the buffer: OWN=0 for CPU, OWN=1 for MAC. The CPU is only allowed to set the flag and the MAC is only allowed to clear it, and both must move through the ring in sequence: thus the ring is used for both "submissions" and "completions." In the stmmac driver, stmmac_rx() bookmarks its position in the ring with the `cur_rx` index. The main receive loop in that function checks for rx_descs[cur_rx].own=0, gives the corresponding buffer to the network stack (NULLing the pointer), and increments `cur_rx` modulo the ring size. After the loop exits, stmmac_rx_refill(), which bookmarks its position with `dirty_rx`, allocates fresh buffers and rearms the descriptors (setting OWN=1). If it fails any allocation, it simply stops early (leaving OWN=0) and will retry where it left off when next called. This means descriptors have a three-stage lifecycle (terms my own): - `empty` (OWN=1, buffer valid) - `full` (OWN=0, buffer valid and populated) - `dirty` (OWN=0, buffer NULL) But because stmmac_rx() only checks OWN, it confuses `full`/`dirty`. In the past (see 'Fixes:'), there was a bug where the loop could cycle `cur_rx` all the way back to the first descriptor it dirtied, resulting in a NULL dereference when mistaken for `full`. The aforementioned commit resolved that *specific* failure by capping the loop's iteration limit at `dma_rx_size - 1`, but this is only a partial fix: if the previous stmmac_rx_refill() didn't complete, then there are leftover `dirty` descriptors that the loop might encounter without needing to cycle fully around. The current code therefore panics (see 'Closes:') when stmmac_rx_refill() is memory-starved long enough for `cur_rx` to catch up to `dirty_rx`. Fix this by explicitly checking, before advancing `cur_rx`, if the next entry is dirty; exit the loop if so. This prevents processing of the final, used descriptor until stmmac_rx_refill() succeeds, but fully prevents the `cur_rx == dirty_rx` ambiguity as the previous bugfix intended: so remove the clamp as well. Since stmmac_rx_zc() is a copy-paste-and-tweak of stmmac_rx() and the code structure is identical, any fix to stmmac_rx() will also need a corresponding fix for stmmac_rx_zc(). Therefore, apply the same check there. In stmmac_rx() (not stmmac_rx_zc()), a related bug remains: after the MAC sets OWN=0 on the final descriptor, it will be unable to send any further DMA-complete IRQs until it's given more `empty` descriptors. Currently, the driver simply *hopes* that the next stmmac_rx_refill() succeeds, risking an indefinite stall of the receive process if not. But this is not a regression, so it can be addressed in a future change. Fixes: b6cb4541853c7 ("net: stmmac: avoid rx queue overrun") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221010 Cc: stable@vger.kernel.org Suggested-by: Russell King <linux@armlinux.org.uk> Signed-off-by: Sam Edwards <CFSworks@gmail.com> Link: https://patch.msgid.link/20260422044503.5349-1-CFSworks@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-28wifi: brcmsmac: phy_lcn: Remove dead code in ↵Chelsy Ratnawat1-10/+3
wlc_lcnphy_radio_2064_channel_tune_4313() The variable rfpll_doubler is initialized to 0 and then unconditionally set to 1 on the very next line, making the subsequent check for !rfpll_doubler always evaluate to false. This results in logically dead code that has never been executed. Remove the unused variable, the unreachable conditional branch, and simplify the fpfd calculation to directly use the PLL doubler values. Signed-off-by: Chelsy Ratnawat <chelsyratnawat2001@gmail.com> Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com> Link: https://patch.msgid.link/20260403193324.141753-1-chelsyratnawat2001@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28Merge tag 'ath-next-20260427' of ↵Johannes Berg10-168/+132
git://git.kernel.org/pub/scm/linux/kernel/git/ath/ath Jeff Johnson says: ================== ath.git patches for v7.2 (PR #1) For ath9k: - improve the GPIO interface. For ath12k: - replace dynamic memory allocation in WMI rx path - avoid buffer overread when configuring IRQs - code housekeeping ================== Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28Merge tag 'ath-current-20260427' of ↵Johannes Berg5-31/+54
git://git.kernel.org/pub/scm/linux/kernel/git/ath/ath Jeff Johnson says: ================== ath.git update for v7.1-rc2 Fix an ath10k build dependency issue along with a few ath12k bugs. ================== Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28wifi: rsi: fix kthread lifetime race between self-exit and external-stopJeongjun Park1-3/+2
RSI driver use both self-exit(kthread_complete_and_exit) and external-stop (kthread_stop) when killing a kthread. Generally, kthread_stop() is called first, and in this case, no particular issues occur. However, in rare instances where kthread_complete_and_exit() is called first and then kthread_stop() is called, a UAF occurs because the kthread object, which has already exited and been freed, is accessed again. Therefore, to prevent this with minimal modification, you must remove kthread_stop() and change the code to wait until the self-exit operation is completed. Cc: <stable@vger.kernel.org> Reported-by: syzbot+5de83f57cd8531f55596@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/69e5d03b.a00a0220.1bd0ca.0064.GAE@google.com/ Fixes: 4c62764d0fc2 ("rsi: improve kernel thread handling to fix kernel panic") Signed-off-by: Jeongjun Park <aha310510@gmail.com> Link: https://patch.msgid.link/20260422173846.37640-1-aha310510@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28wifi: cfg80211: move AP HT/VHT/... operation to beacon infoJohannes Berg1-2/+2
The HT/VHT/HE/EHT/UHR operation can change, and might thus be updated on each beacon update. Move them to the beacon struct and parse them out of the beacon also on updates, not just on starting the AP. This also fixes checks in two ways: - Regulatory checks in nl80211_validate_ap_phy_operation() are now done also on updates, disallowing enabling HE/EHT/UHR on channels that don't allow that after start. This checks only operation now, but clients can't use it without operation. - NL80211_ATTR_UHR_OPERATION is now required whenever UHR is present in the beacon, and rejected otherwise. Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com> Link: https://patch.msgid.link/20260415144514.f70758a46904.I0d21120b41eed661eefc61d5417dadaae7145845@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28wifi: Rename EMLSR delay constants and add EMLMR helpers and definitionsPablo Martin-Gomez4-9/+9
In the final version of 802.11be-2024, Transition Delay and Padding Delay subfield are for both EMLSR and EMLMR. Depending if the mode is EMLSR or EMLMR, the interpretation of the encoded value might change. Define all the constants and helpers to interpret delay subfields both in EMLSR and EMLMR mode. Signed-off-by: Pablo Martin-Gomez <pmartin-gomez@freebox.fr> Link: https://patch.msgid.link/20260410170429.343617-4-pmartin-gomez@freebox.fr Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-28wifi: Remove invalid 128TU transition timeout constantPablo Martin-Gomez1-1/+1
In Table 9-417m of 802.11be-2024, Transition Timeout is defined up to value 10 for a Transition Timeout of 64TUs. The value 11 is reserved and does not correspond to a Transition Timeout of 128TUs. Signed-off-by: Pablo Martin-Gomez <pmartin-gomez@freebox.fr> Link: https://patch.msgid.link/20260410170429.343617-2-pmartin-gomez@freebox.fr Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-27ibmveth: Disable GSO for packets with small MSSMingming Cao2-0/+23
Some physical adapters on Power systems do not support segmentation offload when the MSS is less than 224 bytes. Attempting to send such packets causes the adapter to freeze, stopping all traffic until manually reset. Implement ndo_features_check to disable GSO for packets with small MSS values. The network stack will perform software segmentation instead. The 224-byte minimum matches ibmvnic commit <f10b09ef687f> ("ibmvnic: Enforce stronger sanity checks on GSO packets") which uses the same physical adapters in SEA configurations. The issue occurs specifically when the hardware attempts to perform segmentation (gso_segs > 1) with a small MSS. Single-segment GSO packets (gso_segs == 1) do not trigger the problematic LSO code path and are transmitted normally without segmentation. Add an ndo_features_check callback to disable GSO when MSS < 224 bytes. Also call vlan_features_check() to ensure proper handling of VLAN packets, particularly QinQ (802.1ad) configurations where the hardware parser may not support certain offload features. Validated using iptables to force small MSS values. Without the fix, the adapter freezes. With the fix, packets are segmented in software and transmission succeeds. Comprehensive regression testing completedd (MSS tests, performance, stability). Fixes: 8641dd85799f ("ibmveth: Add support for TSO") Cc: stable@vger.kernel.org Reviewed-by: Brian King <bjking1@linux.ibm.com> Tested-by: Shaik Abdulla <shaik.abdulla1@ibm.com> Tested-by: Naveed Ahmed <naveedaus@in.ibm.com> Signed-off-by: Mingming Cao <mmc@linux.ibm.com> Link: https://patch.msgid.link/20260424162917.65725-1-mmc@linux.ibm.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: usb: rtl8150: free skb on usb_submit_urb() failure in xmitMorduan Zang1-0/+7
When rtl8150_start_xmit() fails to submit the tx URB, the URB is never handed to the USB core and write_bulk_callback() will not run. The driver returns NETDEV_TX_OK, which tells the networking stack that the skb has been consumed, but nothing actually frees the skb on this error path: dev->tx_skb = skb; ... if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) { ... /* no kfree_skb here */ } return NETDEV_TX_OK; This leaks the skb on every submit failure and also leaves dev->tx_skb pointing at memory that the driver itself may later free, which is fragile. Free the skb with dev_kfree_skb_any() in the error path and clear dev->tx_skb so no stale pointer is left behind. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Morduan Zang <zhangdandan@uniontech.com> Link: https://patch.msgid.link/E7D3E1C013C5A859+20260424015517.9574-1-zhangdandan@uniontech.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()Zhan Jun1-1/+4
syzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit() when accessing skb->len for tx statistics after usb_submit_urb() has been called: BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760 drivers/net/usb/rtl8150.c:712 Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226 The URB completion handler write_bulk_callback() frees the skb via dev_kfree_skb_irq(dev->tx_skb). The URB may complete on another CPU in softirq context before usb_submit_urb() returns in the submitter, so by the time the submitter reads skb->len the skb has already been queued to the per-CPU completion_queue and freed by net_tx_action(): CPU A (xmit) CPU B (USB completion softirq) ------------ ------------------------------ dev->tx_skb = skb; usb_submit_urb() --+ |-------> write_bulk_callback() | dev_kfree_skb_irq(dev->tx_skb) | net_tx_action() | napi_skb_cache_put() <-- free netdev->stats.tx_bytes | += skb->len; <-- UAF read Fix it by caching skb->len before submitting the URB and using the cached value when updating the tx_bytes counter. The pre-existing tx_bytes semantics are preserved: the counter tracks the original frame length (skb->len), not the ETH_ZLEN/USB-alignment padded "count" value that is handed to the device. Changing that would be a user-visible accounting change and is out of scope for this UAF fix. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: syzbot+3f46c095ac0ca048cb71@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/69e69ee7.050a0220.24bfd3.002b.GAE@google.com/ Closes: https://syzkaller.appspot.com/bug?extid=3f46c095ac0ca048cb71 Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Zhan Jun <zhanjun@uniontech.com> Link: https://patch.msgid.link/809895186B866C10+20260423004913.136655-1-zhangdandan@uniontech.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27vrf: Fix a potential NPD when removing a port from a VRFIdo Schimmel1-4/+11
RCU readers that identified a net device as a VRF port using netif_is_l3_slave() assume that a subsequent call to netdev_master_upper_dev_get_rcu() will return a VRF device. They then continue to dereference its l3mdev operations. This assumption is not always correct and can result in a NPD [1]. There is no RCU synchronization when removing a port from a VRF, so it is possible for an RCU reader to see a new master device (e.g., a bridge) that does not have l3mdev operations. Fix by adding RCU synchronization after clearing the IFF_L3MDEV_SLAVE flag. Skip this synchronization when a net device is removed from a VRF as part of its deletion and when the VRF device itself is deleted. In the latter case an RCU grace period will pass by the time RTNL is released. [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:l3mdev_fib_table_rcu (net/l3mdev/l3mdev.c:181) [...] Call Trace: <TASK> l3mdev_fib_table_by_index (net/l3mdev/l3mdev.c:201 net/l3mdev/l3mdev.c:189) __inet_bind (net/ipv4/af_inet.c:499 (discriminator 3)) inet_bind_sk (net/ipv4/af_inet.c:469) __sys_bind (./include/linux/file.h:62 (discriminator 1) ./include/linux/file.h:83 (discriminator 1) net/socket.c:1951 (discriminator 1)) __x64_sys_bind (net/socket.c:1969 (discriminator 1) net/socket.c:1967 (discriminator 1) net/socket.c:1967 (discriminator 1)) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Fixes: fdeea7be88b1 ("net: vrf: Set slave's private flag before linking") Reported-by: Haoze Xie <royenheart@gmail.com> Reported-by: Yifan Wu <yifanwucs@gmail.com> Reported-by: Juefei Pu <tomapufckgml@gmail.com> Reported-by: Yuan Tan <yuantan098@gmail.com> Closes: https://lore.kernel.org/netdev/20260419145332.3988923-1-n05ec@lzu.edu.cn/ Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://patch.msgid.link/20260423063607.1208202-1-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()Lorenzo Bianconi1-3/+6
The transmit loop in airoha_dev_xmit() reads fragment address and length during its final iteration, when the loop index equals skb_shinfo(skb)->nr_frags, at which point the fragment data is uninitialized. While these values are never consumed, the read itself is unsafe and may trigger a page fault. Fix this by avoiding the fragment read on the last iteration. Additionally, move the skb pointer from the first to the last used packet descriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb until the final descriptor is processed. Fixes: 23020f0493270 ("net: airoha: Introduce ethernet support for EN7581 SoC") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://patch.msgid.link/20260424-airoha-xmit-fix-read-frag-v1-1-fdc0a83c79e8@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: airoha: Do not wake all netdev TX queues in airoha_qdma_wake_netdev_txqs()Lorenzo Bianconi2-4/+20
Do not wake every netdev TX queue across all ports sharing the QDMA running netif_tx_wake_all_queues routine in airoha_qdma_wake_netdev_txqs() but only the ones that are mapped the specific QDMA stopped hw TX queue. This patch can potentially avoid waking already stopped netdev TX queues that are mapped to a different QDMA hw TX queue. Introduce airoha_qdma_get_txq utility routine. Fixes: b94769eb2f30 ("net: airoha: Fix possible TX queue stall in airoha_qdma_tx_napi_poll()") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://patch.msgid.link/20260421-airoha-wake_netdev_txqs-optmization-v1-1-e0be95115d53@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: airoha: stop net_device TX queue before updating CPU indexLorenzo Bianconi1-5/+4
Currently, airoha_eth driver updates the CPU index register prior of verifying whether the number of free descriptors has fallen below the threshold. Move net_device TX queue length check before updating the TX CPU index in order to update TX CPU index even if there are more packets to be transmitted but the net_device TX queue is going to be stopped accounting the inflight packets. Fixes: 1d304174106c ("net: airoha: Implement BQL support") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://patch.msgid.link/20260421-airoha-xmit-stop-condition-v1-1-e670d6a48467@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27net: airoha: fix BQL imbalance in TX pathLorenzo Bianconi1-4/+3
Fix a possible BQL imbalance in airoha_dev_xmit(), where inflight packets are accounted only for the AIROHA_NUM_TX_RING netdev TX queues. The queue index is computed as: qid = skb_get_queue_mapping(skb) % ARRAY_SIZE(qdma->q_tx) txq = netdev_get_tx_queue(dev, qid); However, airoha_qdma_tx_napi_poll() accounts completions across all netdev TX queues (num_tx_queues), leading to inconsistent BQL accounting. Also reset all netdev TX queues in the ndo_stop callback. Fixes: 1d304174106c ("net: airoha: Implement BQL support") Fixes: c9f947769b77 ("net: airoha: Reset BQL stopping the netdevice") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://patch.msgid.link/20260421-airoha-fix-bql-v1-1-f135afe4275b@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27netdevsim: zero initialize struct iphdr in dummy sk_buffNikola Z. Ivanov1-1/+1
Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header. Closes: https://syzkaller.appspot.com/bug?extid=23d7fcd204e3837866ff Fixes: da58f90f11f5 ("netdevsim: Add devlink-trap support") Signed-off-by: Nikola Z. Ivanov <zlatistiv@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260426201434.742030-1-zlatistiv@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-27wifi: libertas: fix integer underflow in process_cmdrequest()Amir Mohammad Jahangirzad1-2/+3
The existing validation only checks if recvlength exceeds LBS_CMD_BUFFER_SIZE, but doesn't check the lower bound. When a USB device sends a response shorter than MESSAGE_HEADER_LEN, the subtraction (recvlength - MESSAGE_HEADER_LEN) wraps to a huge value, causing memcpy to corrupt the heap. Add the same lower bound check that libertas_tf already has. Signed-off-by: Amir Mohammad Jahangirzad <a.jahangirzad@gmail.com> Link: https://patch.msgid.link/20260418004247.368944-1-a.jahangirzad@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-27wifi: b43legacy: enforce bounds check on firmware key index in RX pathTristan Madani1-1/+2
Same fix as b43: the firmware-controlled key index in b43legacy_rx() can exceed dev->max_nr_keys. The existing B43legacy_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read of dev->key[]. Make the check enforcing by dropping the frame for invalid indices. Fixes: 75388acd0cd8 ("[B43LEGACY]: add mac80211-based driver for legacy BCM43xx devices") Cc: stable@vger.kernel.org Signed-off-by: Tristan Madani <tristan@talencesecurity.com> Link: https://patch.msgid.link/20260417111145.2694196-2-tristmd@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-27wifi: b43: enforce bounds check on firmware key index in b43_rx()Tristan Madani1-1/+2
The firmware-controlled key index in b43_rx() can exceed the dev->key[] array size (58 entries). The existing B43_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read. Make the B43_WARN_ON check enforcing by dropping the frame when the firmware returns an invalid key index. Suggested-by: Jonas Gorski <jonas.gorski@gmail.com> Acked-by: Michael Büsch <m@bues.ch> Fixes: e4d6b7951812 ("[B43]: add mac80211-based driver for modern BCM43xx devices") Cc: stable@vger.kernel.org Signed-off-by: Tristan Madani <tristan@talencesecurity.com> Link: https://patch.msgid.link/20260417111145.2694196-1-tristmd@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-27wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog taskMarek Szyprowski1-2/+4
Watchdog task might end between send_sig() and kthread_stop() calls, what results in the use-after-free issue. Fix this by increasing watchdog task reference count before calling send_sig() and dropping it by switching to kthread_stop_put(). Cc: stable@vger.kernel.org Fixes: 373c83a801f1 ("brcmfmac: stop watchdog before detach and free everything") Fixes: a9ffda88be74 ("brcm80211: fmac: abstract bus_stop interface function pointer") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com> Link: https://patch.msgid.link/20260416093339.2066829-1-m.szyprowski@samsung.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-04-26driver core: Replace dev->of_node_reused with dev_of_node_reused()Douglas Anderson1-1/+1
In C, bitfields are not necessarily safe to modify from multiple threads without locking. Switch "of_node_reused" over to the "flags" field so modifications are safe. Cc: Johan Hovold <johan@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Johan Hovold <johan@kernel.org> Acked-by: Manivannan Sadhasivam <mani@kernel.org> # PCI_PWRCTRL Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://patch.msgid.link/20260406162231.v5.8.I806b8636cd3724f6cd1f5e199318ab8694472d90@changeid Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-04-24bpf: use accessor functions for bpf_reg_state min/max fieldsEduard Zingerman1-4/+4
Replace direct access to bpf_reg_state->{smin,smax,umin,umax, s32_min,s32_max,u32_min,u32_max}_value with getter/setter inline functions, preparing for future switch to cnum-based internal representation. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260424-cnums-everywhere-rfc-v1-v3-2-ca434b39a486@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-04-24Merge tag 'net-deletions' of ↵Linus Torvalds48-30945/+0
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking deletions from Jakub Kicinski: "Delete some obsolete networking code Old code like amateur radio and NFC have long been a burden to core networking developers. syzbot loves to find bugs in BKL-era code, and noobs try to fix them. If we want to have a fighting chance of surviving the LLM-pocalypse this code needs to find a dedicated owner or get deleted. We've talked about these deletions multiple times in the past and every time someone wanted the code to stay. It is never very clear to me how many of those people actually use the code vs are just nostalgic to see it go. Amateur radio did have occasional users (or so I think) but most users switched to user space implementations since its all super slow stuff. Nobody stepped up to maintain the kernel code. We were lucky enough to find someone who wants to help with NFC so we're giving that a chance. Let's try to put the rest of this code behind us" * tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: drivers: net: 8390: wd80x3: Remove this driver drivers: net: 8390: ultra: Remove this driver drivers: net: 8390: AX88190: Remove this driver drivers: net: fujitsu: fmvj18x: Remove this driver drivers: net: smsc: smc91c92: Remove this driver drivers: net: smsc: smc9194: Remove this driver drivers: net: amd: nmclan: Remove this driver drivers: net: amd: lance: Remove this driver drivers: net: 3com: 3c589: Remove this driver drivers: net: 3com: 3c574: Remove this driver drivers: net: 3com: 3c515: Remove this driver drivers: net: 3com: 3c509: Remove this driver net: packetengines: remove obsolete yellowfin driver and vendor dir net: packetengines: remove obsolete hamachi driver net: remove unused ATM protocols and legacy ATM device drivers net: remove ax25 and amateur radio (hamradio) subsystem net: remove ISDN subsystem and Bluetooth CMTP caif: remove CAIF NETWORK LAYER
2026-04-23Merge tag 'net-7.1-rc1' of ↵Linus Torvalds54-479/+871
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Including fixes from Netfilter. Steady stream of fixes. Last two weeks feel comparable to the two weeks before the merge window. Lots of AI-aided bug discovery. A newer big source is Sashiko/Gemini (Roman Gushchin's system), which points out issues in existing code during patch review (maybe 25% of fixes here likely originating from Sashiko). Nice thing is these are often fixed by the respective maintainers, not drive-bys. Current release - new code bugs: - kconfig: MDIO_PIC64HPSC should depend on ARCH_MICROCHIP Previous releases - regressions: - add async ndo_set_rx_mode and switch drivers which we promised to be called under the per-netdev mutex to it - dsa: remove duplicate netdev_lock_ops() for conduit ethtool ops - hv_sock: report EOF instead of -EIO for FIN - vsock/virtio: fix MSG_PEEK calculation on bytes to copy Previous releases - always broken: - ipv6: fix possible UAF in icmpv6_rcv() - icmp: validate reply type before using icmp_pointers - af_unix: drop all SCM attributes for SOCKMAP - netfilter: fix a number of bugs in the osf (OS fingerprinting) - eth: intel: fix timestamp interrupt configuration for E825C Misc: - bunch of data-race annotations" * tag 'net-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (148 commits) rxrpc: Fix error handling in rxgk_extract_token() rxrpc: Fix re-decryption of RESPONSE packets rxrpc: Fix rxrpc_input_call_event() to only unshare DATA packets rxrpc: Fix missing validation of ticket length in non-XDR key preparsing rxgk: Fix potential integer overflow in length check rxrpc: Fix conn-level packet handling to unshare RESPONSE packets rxrpc: Fix potential UAF after skb_unshare() failure rxrpc: Fix rxkad crypto unalignment handling rxrpc: Fix memory leaks in rxkad_verify_response() net: rds: fix MR cleanup on copy error m68k: mvme147: Make me the maintainer net: txgbe: fix firmware version check selftests/bpf: check epoll readiness during reuseport migration tcp: call sk_data_ready() after listener migration vhost_net: fix sleeping with preempt-disabled in vhost_net_busy_poll() ipv6: Cap TLV scan in ip6_tnl_parse_tlv_enc_lim tipc: fix double-free in tipc_buf_append() llc: Return -EINPROGRESS from llc_ui_connect() ipv4: icmp: validate reply type before using icmp_pointers selftests/net: packetdrill: cover RFC 5961 5.2 challenge ACK on both edges ...
2026-04-23drivers: net: 8390: wd80x3: Remove this driverAndrew Lunn4-590/+0
The wd80x3 was written by Donald Becker 1993 to 1994. It is an ISA device, so unlikely to be used with modern kernels. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-15-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 8390: ultra: Remove this driverAndrew Lunn4-652/+0
The ultra was written by Donald Becker 1993 to 1998. It is an ISA device, so unlikely to be used with modern kernels. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-14-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 8390: AX88190: Remove this driverAndrew Lunn3-1720/+0
The ax88190 was written by David A. Hinds in 2001. It is an PCMCIA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-12-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: fujitsu: fmvj18x: Remove this driverAndrew Lunn5-1214/+0
The fmvj18x was written by Shingo Fujimoto in 2002. It is an PCMCIA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-11-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: smsc: smc91c92: Remove this driverAndrew Lunn3-2072/+0
The smc91c92 was written by David A Hinds in 1999. It is an PCMCIA device, so unlikely to be used with modern kernels. Remove the Documentation as well, since it refers to kernel versions 1.2.13 until 1.3.71 and FTP sites which no longer exist. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-8-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: smsc: smc9194: Remove this driverAndrew Lunn4-1554/+0
The smc9194 was written by Erik Stahlman in 1996. It is an ISA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-7-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: amd: nmclan: Remove this driverAndrew Lunn3-1519/+0
The nmclan was written by Roger C Pao in 1995. It is an PCMCIA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-6-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: amd: lance: Remove this driverAndrew Lunn4-1332/+0
The lance was written by Donald Becker between 1993-1998. It is an ISA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-5-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 3com: 3c589: Remove this driverAndrew Lunn3-985/+0
The 3c589 was written by David A. Hinds 2001. It is an PCMCIA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-4-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 3com: 3c574: Remove this driverAndrew Lunn3-1175/+0
The 3c574 was written by Donald Becker between 1993-1998. It is an PCMCIA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-3-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 3com: 3c515: Remove this driverAndrew Lunn4-1581/+0
The 3c515 was written by Donald Becker between 1997-1998. It is an ISA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-2-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23drivers: net: 3com: 3c509: Remove this driverAndrew Lunn3-1463/+0
The 3c509 was written by Donald Becker between 1993-2000. It is an ISA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-1-08a5b59784d5@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23net: packetengines: remove obsolete yellowfin driver and vendor dirMingyu Wang5-1480/+0
Similar to the hamachi driver, the yellowfin driver supports hardware that is over two decades old and no longer in active use. Since yellowfin was the last remaining driver in the packetengines vendor directory, we can now safely remove the entire directory and drop its associated references from the parent Kconfig and Makefile. This eliminates dead code and reduces the overall maintenance burden on the netdev subsystem. Signed-off-by: Mingyu Wang <25181214217@stu.xidian.edu.cn> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422044820.485660-3-25181214217@stu.xidian.edu.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23net: packetengines: remove obsolete hamachi driverMingyu Wang3-1978/+0
The PacketEngine Hamachi driver is for PCI hardware that has been obsolete for over two decades. It recently triggered arithmetic exceptions during automated fuzzing. As suggested by maintainers, remove the driver entirely to eliminate dead code and reduce the maintenance burden. Signed-off-by: Mingyu Wang <25181214217@stu.xidian.edu.cn> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260422044820.485660-2-25181214217@stu.xidian.edu.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23net: txgbe: fix firmware version checkJiawen Wu1-1/+2
For the device SP, the firmware version is a 32-bit value where the lower 20 bits represent the base version number. And the customized firmware version populates the upper 12 bits with a specific identification number. For other devices AML 25G and 40G, the upper 12 bits of the firmware version is always non-zero, and they have other naming conventions. Only SP devices need to check this to tell if XPCS will work properly. So the judgement of MAC type is added here. And the original logic compared the entire 32-bit value against 0x20010, which caused the outdated base firmwares bypass the version check without a warning. Apply a mask 0xfffff to isolate the lower 20 bits for an accurate base version comparison. Fixes: ab928c24e6cd ("net: txgbe: add FW version warning") Cc: stable@vger.kernel.org Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Link: https://patch.msgid.link/C787AA5C07598B13+20260422071837.372731-1-jiawenwu@trustnetic.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23nfp: fix swapped arguments in nfp_encode_basic_qdr() callsAlexey Kodanev1-6/+11
There is a mismatch between the passed arguments and the actual nfp_encode_basic_qdr() function parameter names: static int nfp_encode_basic_qdr(u64 addr, int dest_island, int cpp_tgt, int mode, bool addr40, int isld1, int isld0) { ... But "dest_island" and "cpp_tgt" are swapped at every call-site. For example: return nfp_encode_basic_qdr(*addr, cpp_tgt, dest_island, mode, addr40, isld1, isld0); As a result, nfp_encode_basic_qdr() receives "dest_island" as CPP target type, which is always NFP_CPP_TARGET_QDR(2) for these calls, and "cpp_tgt" as the destination island ID, which can accidentally match or be outside the valid NFP_CPP_TARGET_* types (e.g. '-1' for any destination). Since code already worked for years, also add extra pr_warn() to error paths in nfp_encode_basic_qdr() to help identify any potential address verification failures. Detected using the static analysis tool - Svace. Fixes: 4cb584e0ee7d ("nfp: add CPP access core") Signed-off-by: Alexey Kodanev <aleksei.kodanev@bell-sw.com> Link: https://patch.msgid.link/20260422160536.61855-1-aleksei.kodanev@bell-sw.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23wifi: ath12k: use lockdep_assert_in_rcu_read_lock() for RCU assertionsYu-Hsiang Tseng2-2/+2
Two functions in ath12k assert that the caller holds an RCU read lock: ath12k_mac_get_arvif() and ath12k_p2p_noa_update_vdev_iter(). Both use: WARN_ON(!rcu_read_lock_any_held()); On kernels using preemptible RCU (CONFIG_PREEMPT=y or CONFIG_PREEMPT_RT=y) without CONFIG_DEBUG_LOCK_ALLOC, this produces a false positive splat whenever these functions are invoked from paths that do hold the RCU read lock (e.g. firmware stats processing or mac80211 interface iteration). Root cause: - Without CONFIG_DEBUG_LOCK_ALLOC, rcu_read_lock_any_held() is a static inline that returns !preemptible() as a proxy for "in an RCU read section". - With preemptible RCU, rcu_read_lock() does not disable preemption. A task can therefore be preemptible while legitimately holding an RCU read lock, making the proxy unreliable. - Callers such as ath12k_wmi_tlv_rssi_chain_parse() (via guard(rcu)()) and ieee80211_iterate_active_interfaces_atomic() do hold the RCU read lock, so these warnings are incorrect. Typical splat seen on a WCN7850 station with periodic fw stats processing: WARNING: drivers/net/wireless/ath/ath12k/mac.c:791 at ath12k_mac_get_arvif+0x9e/0xd0 [ath12k] Tainted: G W O 6.19.13-rt #1 PREEMPT_RT Call Trace: ath12k_wmi_tlv_rssi_chain_parse+0x69/0x170 [ath12k] ath12k_wmi_tlv_iter+0x7f/0x120 [ath12k] ath12k_wmi_tlv_fw_stats_parse+0x342/0x6b0 [ath12k] ath12k_wmi_op_rx+0xe9e/0x3150 [ath12k] ath12k_htc_rx_completion_handler+0x3df/0x5b0 [ath12k] ath12k_ce_per_engine_service+0x325/0x3e0 [ath12k] ath12k_pci_ce_workqueue+0x20/0x40 [ath12k] Replace WARN_ON(!rcu_read_lock_any_held()) with lockdep_assert_in_rcu_read_lock(), which is gated on CONFIG_PROVE_RCU and therefore compiles out entirely when PROVE_RCU is disabled. PROVE_RCU kernels continue to get the full lockdep-based check, and the new helper precisely checks for rcu_read_lock() rather than any RCU variant, which better matches the callers' expectations. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3 Fixes: 3dd2c68f206e ("wifi: ath12k: prepare vif data structure for MLO handling") Suggested-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com> Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com> Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com> Signed-off-by: Yu-Hsiang Tseng <asas1asas200@gmail.com> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://patch.msgid.link/20260422180814.1938317-1-asas1asas200@gmail.com Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
2026-04-23wifi: ath10k: snoc: select POWER_SEQUENCINGDmitry Baryshkov1-0/+1
The commit afcf3ec615c9 ("wifi: ath10k: snoc: support powering on the device via pwrseq") made ath10k SNOC driver use devm_pwrseq_get(). Select the corresponding Kconfig symbol to make sure that API call is always available and doesn't return an error per se. Fixes: afcf3ec615c9 ("wifi: ath10k: snoc: support powering on the device via pwrseq") Reported-by: Luca Weiss <luca.weiss@fairphone.com> Closes: https://lore.kernel.org/r/DHUHU7UIT487.139L3KIVRVREU@fairphone.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com> Link: https://patch.msgid.link/20260418-ath10k-snoc-pwrseq-v1-1-832594ba3294@oss.qualcomm.com Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
2026-04-23wifi: ath12k: fix OF node refcount imbalance in WSI graph traversalAaradhana Sahu1-29/+48
ath12k_core_get_wsi_info() traverses the WSI (Wired Serial Interface) device graph starting from dev->of_node. The current code uses dev->of_node directly as the local traversal pointer and calls of_node_put() on error. Since the driver does not own a reference to dev->of_node, dropping it during traversal results in the following OF refcount underflow: OF: ERROR: of_node_release() detected bad of_node_put() on /soc@0/wifi@c000000 CPU: 1 UID: 0 PID: 210 Comm: insmod Not tainted 6.19.0-rc4-next-20260109-00023-g797dd36dc178 #26 PREEMPT Hardware name: Qualcomm Technologies, Inc. IPQ5332 MI01.2 (DT) Call trace: show_stack+0x18/0x24 (C) dump_stack_lvl+0x60/0x80 dump_stack+0x18/0x24 of_node_release+0x164/0x1a0 kobject_put+0xb4/0x278 of_node_put+0x18/0x28 ath12k_core_init+0x29c/0x5d4 [ath12k] ath12k_ahb_probe+0x950/0xc14 [ath12k] platform_probe+0x5c/0xa4 really_probe+0xc0/0x3ec __driver_probe_device+0x80/0x170 driver_probe_device+0x3c/0x120 __driver_attach+0xc4/0x218 OF: ERROR: next of_node_put() on this node will result in a kobject warning 'refcount_t: underflow; use-after-free.' Fix this by explicitly acquiring a reference to the starting node using of_node_get() and attaching automatic cleanup via __free(device_node). Each discovered WSI node is stored in ag->wsi_node[] with its own of_node_get() reference. These references are later released in ath12k_core_free_wsi_info() during driver teardown. Also remove unnecessary memset() of wsi_node array since cleanup now explicitly sets pointers to NULL. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1 Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1 Fixes: 908c10c860e0 ("wifi: ath12k: parse multiple device information from Device Tree") Signed-off-by: Aaradhana Sahu <aaradhana.sahu@oss.qualcomm.com> Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com> Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com> Link: https://patch.msgid.link/20260410071300.2323603-1-aaradhana.sahu@oss.qualcomm.com Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
2026-04-23wifi: ath12k: prepare REO update element only for primary linkBaochen Qiang1-0/+3
Commit [1] introduces dp->reo_cmd_update_rx_queue_list for the purpose of tracking all pending REO queue flush commands. The helper ath12k_dp_prepare_reo_update_elem() allocates an element and populates it with REO queue information, then add it to the list. The element would be helpful during clean up stage to finally unmap/free the corresponding REO queue buffer. In MLO scenarios with more than one links, for non dp_primary_link_only chips like WCN7850, that helper is called for each link peer. This results in multiple elements added to the list but all of them pointing to the same REO queue buffer. Consequently the same buffer gets unmap/freed multiple times: BUG kmalloc-2k (Tainted: G B W O ): Object already free ----------------------------------------------------------------------------- Allocated in ath12k_wifi7_dp_rx_assign_reoq+0xce/0x280 [ath12k_wifi7] age=7436 cpu=10 pid=16130 __kmalloc_noprof ath12k_wifi7_dp_rx_assign_reoq ath12k_dp_rx_peer_tid_setup ath12k_dp_peer_setup ath12k_mac_station_add ath12k_mac_op_sta_state [...] Freed in ath12k_dp_rx_tid_cleanup.part.0+0x25/0x40 [ath12k] age=1 cpu=27 pid=16137 kfree ath12k_dp_rx_tid_cleanup.part.0 ath12k_dp_rx_reo_cmd_list_cleanup ath12k_dp_cmn_device_deinit ath12k_core_stop ath12k_core_hw_group_cleanup ath12k_pci_remove Fix this by allowing list addition for primary link only. Note dp_primary_link_only chips like QCN9274 are not affected by this change, because that's what they were doing in the first place. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3 Fixes: 3bf2e57e7d6c ("wifi: ath12k: Add Retry Mechanism for REO RX Queue Update Failures") # [1] Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221011 Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com> Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com> Link: https://patch.msgid.link/20260210-ath12k-rxtid-double-free-v1-1-8b523fb2886d@oss.qualcomm.com Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
2026-04-23net: remove ax25 and amateur radio (hamradio) subsystemJakub Kicinski14-10352/+0
Remove the amateur radio (AX.25, NET/ROM, ROSE) protocol implementation and all associated hamradio device drivers from the kernel tree. This set of protocols has long been a huge bug/syzbot magnet, and since nobody stepped up to help us deal with the influx of the AI-generated bug reports we need to move it out of tree to protect our sanity. The code is moved to an out-of-tree repo: https://github.com/linux-netdev/mod-orphan if it's cleaned up and reworked there we can accept it back. Minimal stub headers are kept for include/net/ax25.h (AX25_P_IP, AX25_ADDR_LEN, ax25_address) and include/net/rose.h (ROSE_ADDR_LEN) so that the conditional integration code in arp.c and tun.c continues to compile and work when the out-of-tree modules are loaded. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> Link: https://patch.msgid.link/20260421021824.1293976-1-kuba@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>