kernel/linux.git/drivers/net/wireless/atmel, branch v7.1.6

wifi: at76c50x-usb: avoid length underflow in at76_guess_freq()

2026-08-03T09:25:24+00:00

commit 61a799ffd1e5a4fd3702d547828b7ff3d161468e upstream. at76_guess_freq() checks only that the received frame is at least a bare 802.11 header (24 bytes) before subtracting the fixed management-body offset: len -= el_off; For both beacon and probe response frames, el_off is 36. If the frame is shorter than el_off, subtracting it causes the calculated IE length to wrap. The length is eventually passed to cfg80211_find_elem_match() as a very large unsigned value, so the element walk runs beyond the RX skb. This path is reached from at76_rx_tasklet() while scanning. If the device delivers a truncated beacon or probe response, the oversized IE length causes an out-of-bounds read during scanning. Skip the IE lookup if the frame does not reach the variable elements, before subtracting el_off. Fixes: 1264b951463a ("at76c50x-usb: add driver") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Huihui Huang Link: https://patch.msgid.link/20260715140815.1242033-1-hhhuang@smu.edu.sg Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman

wifi: at76c50x: refactor endpoint lookup

2026-04-08T06:33:40+00:00

Use the common USB helper for looking up bulk and interrupt endpoints instead of open coding. Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260407151111.3187826-2-johan@kernel.org Signed-off-by: Johannes Berg

wifi: at76c50x: drop redundant device reference

2026-03-06T09:55:28+00:00

Driver core holds a reference to the USB interface and its parent USB device while the interface is bound to a driver and there is no need to take additional references unless the structures are needed after disconnect. Drop the redundant device reference to reduce cargo culting, make it easier to spot drivers where an extra reference is needed, and reduce the risk of memory leaks when drivers fail to release it. Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260306085144.12064-7-johan@kernel.org Signed-off-by: Johannes Berg

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

wifi: cfg80211/mac80211: Add support to get radio index

2025-06-24T13:19:27+00:00

Currently, per-radio attributes are set on per-phy basis, i.e., all the radios present in a wiphy will take attributes values sent from user. But each radio in a wiphy can get different values from userspace based on its requirement. To extend support to set per-radio attributes, add support to get radio index from userspace. Add an NL attribute - NL80211_ATTR_WIPHY_RADIO_INDEX, to get user specified radio index for which attributes should be changed. Pass this to individual drivers, so that the drivers can use this radio index to change per-radio attributes when necessary. Currently, per-radio attributes identified are: NL80211_ATTR_WIPHY_TX_POWER_LEVEL NL80211_ATTR_WIPHY_ANTENNA_TX NL80211_ATTR_WIPHY_ANTENNA_RX NL80211_ATTR_WIPHY_RETRY_SHORT NL80211_ATTR_WIPHY_RETRY_LONG NL80211_ATTR_WIPHY_FRAG_THRESHOLD NL80211_ATTR_WIPHY_RTS_THRESHOLD NL80211_ATTR_WIPHY_COVERAGE_CLASS NL80211_ATTR_TXQ_LIMIT NL80211_ATTR_TXQ_MEMORY_LIMIT NL80211_ATTR_TXQ_QUANTUM By default, the radio index is set to -1. This means the attribute should be treated as a global configuration. If the user has not specified any index, then the radio index passed to individual drivers would be -1. This would indicate that the attribute applies to all radios in that wiphy. Signed-off-by: Roopni Devanathan Link: https://patch.msgid.link/20250615082312.619639-2-quic_rdevanat@quicinc.com Signed-off-by: Johannes Berg

Merge tag 'wireless-2025-04-11' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless

2025-04-11T23:38:04+00:00

Johannes Berg says: ==================== Just a handful of fixes, notably - iwlwifi: various build warning fixes (e.g. PM_SLEEP) - iwlwifi: fix operation when FW reset handshake times out - mac80211: drop pending frames on interface down * tag 'wireless-2025-04-11' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless: Revert "wifi: mac80211: Update skb's control block key in ieee80211_tx_dequeue()" wifi: iwlwifi: mld: Restart firmware on iwl_mld_no_wowlan_resume() error wifi: iwlwifi: pcie: set state to no-FW before reset handshake wifi: wl1251: fix memory leak in wl1251_tx_work wifi: brcmfmac: fix memory leak in brcmf_get_module_param wifi: iwlwifi: mld: silence uninitialized variable warning wifi: mac80211: Purge vif txq in ieee80211_do_stop() wifi: mac80211: Update skb's control block key in ieee80211_tx_dequeue() wifi: at76c50x: fix use after free access in at76_disconnect wifi: add wireless list to MAINTAINERS iwlwifi: mld: fix building with CONFIG_PM_SLEEP disabled wifi: iwlwifi: mld: fix PM_SLEEP -Wundef warning wifi: iwlwifi: mld: reduce scope for uninitialized variable ==================== Link: https://patch.msgid.link/20250411142354.24419-3-johannes@sipsolutions.net Signed-off-by: Jakub Kicinski

treewide: Switch/rename to timer_delete[_sync]()

2025-04-05T08:30:12+00:00

timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree over and remove the historical wrapper inlines. Conversion was done with coccinelle plus manual fixups where necessary. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

wifi: at76c50x: fix use after free access in at76_disconnect

2025-04-02T08:43:56+00:00

The memory pointed to by priv is freed at the end of at76_delete_device function (using ieee80211_free_hw). But the code then accesses the udev field of the freed object to put the USB device. This may also lead to a memory leak of the usb device. Fix this by using udev from interface. Fixes: 29e20aa6c6af ("at76c50x-usb: fix use after free on failure path in at76_probe()") Signed-off-by: Abdun Nihaal Link: https://patch.msgid.link/20250330103110.44080-1-abdun.nihaal@gmail.com Signed-off-by: Johannes Berg

wifi: mac80211: inform the low level if drv_stop() is a suspend

2024-06-26T08:25:46+00:00

This will allow the low level driver to take different actions for different flows. Signed-off-by: Emmanuel Grumbach Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20240618192529.739036208b6e.Ie18a2fe8e02bf2717549d39420b350cfdaf3d317@changeid Signed-off-by: Johannes Berg