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2024-08-29wifi: mac80211: fix potential null pointer dereferenceFelix Fietkau1-2/+2
commit a16fc38315f2c69c520ee769976ecb9c706b8560 upstream. rx->sta->amsdu_mesh_control is being passed to ieee80211_amsdu_to_8023s without checking rx->sta. Since it doesn't make sense to accept A-MSDU packets without a sta, simply add a check earlier. Fixes: 6e4c0d0460bd ("wifi: mac80211: add a workaround for receiving non-standard mesh A-MSDU") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230330090001.60750-2-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: drop bogus static keywords in A-MSDU rxFelix Fietkau1-2/+2
commit 4d78e032fee5d532e189cdb2c3c76112094e9751 upstream. These were unintentional copy&paste mistakes. Cc: stable@vger.kernel.org Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230330090001.60750-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: fix receiving mesh packets in forwarding=0 networksFelix Fietkau1-8/+8
commit e26c0946a5c1aa4d27f8dfe78f2a72b4550df91f upstream. When forwarding is set to 0, frames are typically sent with ttl=1. Move the ttl decrement check below the check for local receive in order to fix packet drops. Reported-by: Thomas Hühn <thomas.huehn@hs-nordhausen.de> Reported-by: Nick Hainke <vincent@systemli.org> Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230326151709.17743-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: fix flow dissection for forwarded packetsFelix Fietkau1-1/+1
commit 899c2c11810cfe38cb01c847d0df98e181ea5728 upstream. Adjust the network header to point at the correct payload offset Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230324120924.38412-2-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: fix mesh forwardingFelix Fietkau1-0/+3
commit 8f0149a8ac59c12cd47271ac625c27dac5621d3a upstream. Linearize packets (needed for forwarding A-MSDU subframes). Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230324120924.38412-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: fix mesh path discovery based on unicast packetsFelix Fietkau1-11/+11
commit f355f70145744518ca1d9799b42f4a8da9aa0d36 upstream. If a packet has reached its intended destination, it was bumped to the code that accepts it, without first checking if a mesh_path needs to be created based on the discovered source. Fix this by moving the destination address check further down. Cc: stable@vger.kernel.org Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230314095956.62085-3-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: add documentation for amsdu_mesh_controlJohannes Berg1-0/+2
commit 3caf31e7b18a90b74a2709d761a0dfa423f2c2e4 upstream. This documentation wasn't added in the original patch, add it now. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Fixes: 6e4c0d0460bd ("wifi: mac80211: add a workaround for receiving non-standard mesh A-MSDU") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-29wifi: mac80211: fix BA session teardown raceJohannes Berg3-8/+15
[ Upstream commit 05f136220d17839eb7c155f015ace9152f603225 ] As previously reported by Alexander, whose commit 69403bad97aa ("wifi: mac80211: sdata can be NULL during AMPDU start") I'm reverting as part of this commit, there's a race between station destruction and aggregation setup, where the aggregation setup can happen while the station is being removed and queue the work after ieee80211_sta_tear_down_BA_sessions() has already run in __sta_info_destroy_part1(), and thus the worker will run with a now freed station. In his case, this manifested in a NULL sdata pointer, but really there's no guarantee whatsoever. The real issue seems to be that it's possible at all to have a situation where this occurs - we want to stop the BA sessions when doing _part1, but we cannot be sure, and WLAN_STA_BLOCK_BA isn't necessarily effective since we don't know that the setup isn't concurrently running and already got past the check. Simply call ieee80211_sta_tear_down_BA_sessions() again in the second part of station destruction, since at that point really nothing else can hold a reference to the station any more. Also revert the sdata checks since those are just misleading at this point. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: add a workaround for receiving non-standard mesh A-MSDUFelix Fietkau3-3/+16
[ Upstream commit 6e4c0d0460bd32ca9244dff3ba2d2da27235de11 ] At least ath10k and ath11k supported hardware (maybe more) does not implement mesh A-MSDU aggregation in a standard compliant way. 802.11-2020 9.3.2.2.2 declares that the Mesh Control field is part of the A-MSDU header (and little-endian). As such, its length must not be included in the subframe length field. Hardware affected by this bug treats the mesh control field as part of the MSDU data and sets the length accordingly. In order to avoid packet loss, keep track of which stations are affected by this and take it into account when converting A-MSDU to 802.3 + mesh control packets. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230213100855.34315-5-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: 9ad797485692 ("wifi: cfg80211: check A-MSDU format more carefully") Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: fix receiving A-MSDU frames on mesh interfacesFelix Fietkau1-156/+194
[ Upstream commit 986e43b19ae9176093da35e0a844e65c8bf9ede7 ] The current mac80211 mesh A-MSDU receive path fails to parse A-MSDU packets on mesh interfaces, because it assumes that the Mesh Control field is always directly after the 802.11 header. 802.11-2020 9.3.2.2.2 Figure 9-70 shows that the Mesh Control field is actually part of the A-MSDU subframe header. This makes more sense, since it allows packets for multiple different destinations to be included in the same A-MSDU, as long as RA and TID are still the same. Another issue is the fact that the A-MSDU subframe length field was apparently accidentally defined as little-endian in the standard. In order to fix this, the mesh forwarding path needs happen at a different point in the receive path. ieee80211_data_to_8023_exthdr is changed to ignore the mesh control field and leave it in after the ethernet header. This also affects the source/dest MAC address fields, which now in the case of mesh point to the mesh SA/DA. ieee80211_amsdu_to_8023s is changed to deal with the endian difference and to add the Mesh Control length to the subframe length, since it's not covered by the MSDU length field. With these changes, the mac80211 will get the same packet structure for converted regular data packets and unpacked A-MSDU subframes. The mesh forwarding checks are now only performed after the A-MSDU decap. For locally received packets, the Mesh Control header is stripped away. For forwarded packets, a new 802.11 header gets added. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230213100855.34315-4-nbd@nbd.name [fix fortify build error] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: 9ad797485692 ("wifi: cfg80211: check A-MSDU format more carefully") Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: remove mesh forwarding congestion checkFelix Fietkau3-9/+0
[ Upstream commit 5c1e269aa5ebafeec69b68ff560522faa5bcb6c1 ] Now that all drivers use iTXQ, it does not make sense to check to drop tx forwarding packets when the driver has stopped the queues. fq_codel will take care of dropping packets when the queues fill up Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230213100855.34315-3-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: 9ad797485692 ("wifi: cfg80211: check A-MSDU format more carefully") Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: fix and simplify unencrypted drop check for meshFelix Fietkau1-28/+10
[ Upstream commit 94b9b9de05b62ac54d8766caa9865fb4d82cc47e ] ieee80211_drop_unencrypted is called from ieee80211_rx_h_mesh_fwding and ieee80211_frame_allowed. Since ieee80211_rx_h_mesh_fwding can forward packets for other mesh nodes and is called earlier, it needs to check the decryptions status and if the packet is using the control protocol on its own, instead of deferring to the later call from ieee80211_frame_allowed. Because of that, ieee80211_drop_unencrypted has a mesh specific check that skips over the mesh header in order to check the payload protocol. This code is invalid when called from ieee80211_frame_allowed, since that happens after the 802.11->802.3 conversion. Fix this by moving the mesh specific check directly into ieee80211_rx_h_mesh_fwding. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20221201135730.19723-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: 9ad797485692 ("wifi: cfg80211: check A-MSDU format more carefully") Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: fix change_address deadlock during unregisterJohannes Berg1-0/+8
[ Upstream commit 74a7c93f45abba538914a65dd2ef2ea7cf7150e2 ] When using e.g. bonding, and doing a sequence such as # iw wlan0 set type __ap # ip link add name bond1 type bond # ip link set wlan0 master bond1 # iw wlan0 interface del we deadlock, since the wlan0 interface removal will cause bonding to reset the MAC address of wlan0. The locking would be somewhat difficult to fix, but since this only happens during removal, we can simply ignore the MAC address change at this time. Reported-by: syzbot+25b3a0b24216651bc2af@syzkaller.appspotmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Link: https://lore.kernel.org/r/20231012123447.9f9d7fd1f237.Ic3a5ef4391b670941a69cec5592aefc79d9c2890@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-29wifi: mac80211: take wiphy lock for MAC addr changeJohannes Berg1-3/+16
[ Upstream commit a26787aa13974fb0b3fb42bfeb4256c1b686e305 ] We want to ensure everything holds the wiphy lock, so also extend that to the MAC change callback. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: 74a7c93f45ab ("wifi: mac80211: fix change_address deadlock during unregister") Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-03wifi: mac80211: check basic rates validityJohannes Berg1-10/+11
commit ce04abc3fcc62cd5640af981ebfd7c4dc3bded28 upstream. When userspace sets basic rates, it might send us some rates list that's empty or consists of invalid values only. We're currently ignoring invalid values and then may end up with a rates bitmap that's empty, which later results in a warning. Reject the call if there were no valid rates. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Reported-by: syzbot+07bee335584b04e7c2f8@syzkaller.appspotmail.com Tested-by: syzbot+07bee335584b04e7c2f8@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=07bee335584b04e7c2f8 Signed-off-by: Vincenzo Mezzela <vincenzo.mezzela@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-03wifi: mac80211: track capability/opmode NSS separatelyJohannes Berg5-28/+30
commit a8bca3e9371dc5e276af4168be099b2a05554c2a upstream. We're currently tracking rx_nss for each station, and that is meant to be initialized to the capability NSS and later reduced by the operating mode notification NSS. However, we're mixing up capabilities and operating mode NSS in the same variable. This forces us to recalculate the NSS capability on operating mode notification RX, which is a bit strange; due to the previous fix I had to never keep rx_nss as zero, it also means that the capa is never taken into account properly. Fix all this by storing the capability value, that can be recalculated unconditionally whenever needed, and storing the operating mode notification NSS separately, taking it into account when assigning the final rx_nss value. Cc: stable@vger.kernel.org Fixes: dd6c064cfc3f ("wifi: mac80211: set station RX-NSS on reconfig") Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20240228120157.0e1c41924d1d.I0acaa234e0267227b7e3ef81a59117c8792116bc@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> [Fixed trivial merge conflict in copyright year net/mac80211/sta_info.h] Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-03wifi: mac80211: Allow NSS change only up to capabilityRameshkumar Sundaram1-5/+20
commit 57b341e9ab13e5688491bfd54f8b5502416c8905 upstream. Stations can update bandwidth/NSS change in VHT action frame with action type Operating Mode Notification. (IEEE Std 802.11-2020 - 9.4.1.53 Operating Mode field) For Operating Mode Notification, an RX NSS change to a value greater than AP's maximum NSS should not be allowed. During fuzz testing, by forcefully sending VHT Op. mode notif. frames from STA with random rx_nss values, it is found that AP accepts rx_nss values greater that APs maximum NSS instead of discarding such NSS change. Hence allow NSS change only up to maximum NSS that is negotiated and capped to AP's capability during association. Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com> Link: https://lore.kernel.org/r/20230207114146.10567-1-quic_ramess@quicinc.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-25wifi: mac80211: disable softirqs for queued frame handlingJohannes Berg2-0/+3
commit 321028bc45f01edb9e57b0ae5c11c5c3600d00ca upstream. As noticed by syzbot, calling ieee80211_handle_queued_frames() (and actually handling frames there) requires softirqs to be disabled, since we call into the RX code. Fix that in the case of cleaning up frames left over during shutdown. Fixes: 177c6ae9725d ("wifi: mac80211: handle tasklet frames before stopping") Reported-by: syzbot+1d516edf1e74469ba5d3@syzkaller.appspotmail.com Link: https://patch.msgid.link/20240626091559.cd6f08105a6e.I74778610a5ff2cf8680964698131099d2960352a@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-25wifi: mac80211: fix UBSAN noise in ieee80211_prep_hw_scan()Dmitry Antipov1-4/+10
[ Upstream commit 92ecbb3ac6f3fe8ae9edf3226c76aa17b6800699 ] When testing the previous patch with CONFIG_UBSAN_BOUNDS, I've noticed the following: UBSAN: array-index-out-of-bounds in net/mac80211/scan.c:372:4 index 0 is out of range for type 'struct ieee80211_channel *[]' CPU: 0 PID: 1435 Comm: wpa_supplicant Not tainted 6.9.0+ #1 Hardware name: LENOVO 20UN005QRT/20UN005QRT <...BIOS details...> Call Trace: <TASK> dump_stack_lvl+0x2d/0x90 __ubsan_handle_out_of_bounds+0xe7/0x140 ? timerqueue_add+0x98/0xb0 ieee80211_prep_hw_scan+0x2db/0x480 [mac80211] ? __kmalloc+0xe1/0x470 __ieee80211_start_scan+0x541/0x760 [mac80211] rdev_scan+0x1f/0xe0 [cfg80211] nl80211_trigger_scan+0x9b6/0xae0 [cfg80211] ...<the rest is not too useful...> Since '__ieee80211_start_scan()' leaves 'hw_scan_req->req.n_channels' uninitialized, actual boundaries of 'hw_scan_req->req.channels' can't be checked in 'ieee80211_prep_hw_scan()'. Although an initialization of 'hw_scan_req->req.n_channels' introduces some confusion around allocated vs. used VLA members, this shouldn't be a problem since everything is correctly adjusted soon in 'ieee80211_prep_hw_scan()'. Cleanup 'kmalloc()' math in '__ieee80211_start_scan()' by using the convenient 'struct_size()' as well. Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru> Link: https://msgid.link/20240517153332.18271-2-dmantipov@yandex.ru [improve (imho) indentation a bit] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-25wifi: mac80211: handle tasklet frames before stoppingJohannes Berg3-2/+12
[ Upstream commit 177c6ae9725d783f9e96f02593ce8fb2639be22f ] The code itself doesn't want to handle frames from the driver if it's already stopped, but if the tasklet was queued before and runs after the stop, then all bets are off. Flush queues before actually stopping, RX should be off at this point since all the interfaces are removed already, etc. Reported-by: syzbot+8830db5d3593b5546d2e@syzkaller.appspotmail.com Link: https://msgid.link/20240515135318.b05f11385c9a.I41c1b33a2e1814c3a7ef352cd7f2951b91785617@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-25wifi: mac80211: apply mcast rate only if interface is upJohannes Berg1-2/+3
[ Upstream commit 02c665f048a439c0d58cc45334c94634bd7c18e6 ] If the interface isn't enabled, don't apply multicast rate changes immediately. Reported-by: syzbot+de87c09cc7b964ea2e23@syzkaller.appspotmail.com Link: https://msgid.link/20240515133410.d6cffe5756cc.I47b624a317e62bdb4609ff7fa79403c0c444d32d@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-25wifi: mac80211: mesh: init nonpeer_pm to active by default in mesh sdataNicolas Escande1-0/+1
[ Upstream commit 6f6291f09a322c1c1578badac8072d049363f4e6 ] With a ath9k device I can see that: iw phy phy0 interface add mesh0 type mp ip link set mesh0 up iw dev mesh0 scan Will start a scan with the Power Management bit set in the Frame Control Field. This is because we set this bit depending on the nonpeer_pm variable of the mesh iface sdata and when there are no active links on the interface it remains to NL80211_MESH_POWER_UNKNOWN. As soon as links starts to be established, it wil switch to NL80211_MESH_POWER_ACTIVE as it is the value set by befault on the per sta nonpeer_pm field. As we want no power save by default, (as expressed with the per sta ini values), lets init it to the expected default value of NL80211_MESH_POWER_ACTIVE. Also please note that we cannot change the default value from userspace prior to establishing a link as using NL80211_CMD_SET_MESH_CONFIG will not work before NL80211_CMD_JOIN_MESH has been issued. So too late for our initial scan. Signed-off-by: Nicolas Escande <nico.escande@gmail.com> Link: https://msgid.link/20240527141759.299411-1-nico.escande@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-21wifi: mac80211: correctly parse Spatial Reuse Parameter Set elementLingbo Kong1-2/+8
[ Upstream commit a26d8dc5227f449a54518a8b40733a54c6600a8b ] Currently, the way of parsing Spatial Reuse Parameter Set element is incorrect and some members of struct ieee80211_he_obss_pd are not assigned. To address this issue, it must be parsed in the order of the elements of Spatial Reuse Parameter Set defined in the IEEE Std 802.11ax specification. The diagram of the Spatial Reuse Parameter Set element (IEEE Std 802.11ax -2021-9.4.2.252). ------------------------------------------------------------------------- | | | | |Non-SRG| SRG | SRG | SRG | SRG | |Element|Length| Element | SR |OBSS PD|OBSS PD|OBSS PD| BSS |Partial| | ID | | ID |Control| Max | Min | Max |Color | BSSID | | | |Extension| | Offset| Offset|Offset |Bitmap|Bitmap | ------------------------------------------------------------------------- Fixes: 1ced169cc1c2 ("mac80211: allow setting spatial reuse parameters from bss_conf") Signed-off-by: Lingbo Kong <quic_lingbok@quicinc.com> Link: https://msgid.link/20240516021854.5682-3-quic_lingbok@quicinc.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-21wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()Remi Pommarel1-2/+2
[ Upstream commit 44c06bbde6443de206b30f513100b5670b23fc5e ] The ieee80211_sta_ps_deliver_wakeup() function takes sta->ps_lock to synchronizes with ieee80211_tx_h_unicast_ps_buf() which is called from softirq context. However using only spin_lock() to get sta->ps_lock in ieee80211_sta_ps_deliver_wakeup() does not prevent softirq to execute on this same CPU, to run ieee80211_tx_h_unicast_ps_buf() and try to take this same lock ending in deadlock. Below is an example of rcu stall that arises in such situation. rcu: INFO: rcu_sched self-detected stall on CPU rcu: 2-....: (42413413 ticks this GP) idle=b154/1/0x4000000000000000 softirq=1763/1765 fqs=21206996 rcu: (t=42586894 jiffies g=2057 q=362405 ncpus=4) CPU: 2 PID: 719 Comm: wpa_supplicant Tainted: G W 6.4.0-02158-g1b062f552873 #742 Hardware name: RPT (r1) (DT) pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x58/0x2d0 lr : invoke_tx_handlers_early+0x5b4/0x5c0 sp : ffff00001ef64660 x29: ffff00001ef64660 x28: ffff000009bc1070 x27: ffff000009bc0ad8 x26: ffff000009bc0900 x25: ffff00001ef647a8 x24: 0000000000000000 x23: ffff000009bc0900 x22: ffff000009bc0900 x21: ffff00000ac0e000 x20: ffff00000a279e00 x19: ffff00001ef646e8 x18: 0000000000000000 x17: ffff800016468000 x16: ffff00001ef608c0 x15: 0010533c93f64f80 x14: 0010395c9faa3946 x13: 0000000000000000 x12: 00000000fa83b2da x11: 000000012edeceea x10: ffff0000010fbe00 x9 : 0000000000895440 x8 : 000000000010533c x7 : ffff00000ad8b740 x6 : ffff00000c350880 x5 : 0000000000000007 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff00000ac0e0e8 Call trace: queued_spin_lock_slowpath+0x58/0x2d0 ieee80211_tx+0x80/0x12c ieee80211_tx_pending+0x110/0x278 tasklet_action_common.constprop.0+0x10c/0x144 tasklet_action+0x20/0x28 _stext+0x11c/0x284 ____do_softirq+0xc/0x14 call_on_irq_stack+0x24/0x34 do_softirq_own_stack+0x18/0x20 do_softirq+0x74/0x7c __local_bh_enable_ip+0xa0/0xa4 _ieee80211_wake_txqs+0x3b0/0x4b8 __ieee80211_wake_queue+0x12c/0x168 ieee80211_add_pending_skbs+0xec/0x138 ieee80211_sta_ps_deliver_wakeup+0x2a4/0x480 ieee80211_mps_sta_status_update.part.0+0xd8/0x11c ieee80211_mps_sta_status_update+0x18/0x24 sta_apply_parameters+0x3bc/0x4c0 ieee80211_change_station+0x1b8/0x2dc nl80211_set_station+0x444/0x49c genl_family_rcv_msg_doit.isra.0+0xa4/0xfc genl_rcv_msg+0x1b0/0x244 netlink_rcv_skb+0x38/0x10c genl_rcv+0x34/0x48 netlink_unicast+0x254/0x2bc netlink_sendmsg+0x190/0x3b4 ____sys_sendmsg+0x1e8/0x218 ___sys_sendmsg+0x68/0x8c __sys_sendmsg+0x44/0x84 __arm64_sys_sendmsg+0x20/0x28 do_el0_svc+0x6c/0xe8 el0_svc+0x14/0x48 el0t_64_sync_handler+0xb0/0xb4 el0t_64_sync+0x14c/0x150 Using spin_lock_bh()/spin_unlock_bh() instead prevents softirq to raise on the same CPU that is holding the lock. Fixes: 1d147bfa6429 ("mac80211: fix AP powersave TX vs. wakeup race") Signed-off-by: Remi Pommarel <repk@triplefau.lt> Link: https://msgid.link/8e36fe07d0fbc146f89196cd47a53c8a0afe84aa.1716910344.git.repk@triplefau.lt Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-21wifi: mac80211: mesh: Fix leak of mesh_preq_queue objectsNicolas Escande1-0/+13
[ Upstream commit b7d7f11a291830fdf69d3301075dd0fb347ced84 ] The hwmp code use objects of type mesh_preq_queue, added to a list in ieee80211_if_mesh, to keep track of mpath we need to resolve. If the mpath gets deleted, ex mesh interface is removed, the entries in that list will never get cleaned. Fix this by flushing all corresponding items of the preq_queue in mesh_path_flush_pending(). This should take care of KASAN reports like this: unreferenced object 0xffff00000668d800 (size 128): comm "kworker/u8:4", pid 67, jiffies 4295419552 (age 1836.444s) hex dump (first 32 bytes): 00 1f 05 09 00 00 ff ff 00 d5 68 06 00 00 ff ff ..........h..... 8e 97 ea eb 3e b8 01 00 00 00 00 00 00 00 00 00 ....>........... backtrace: [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c [<00000000049bd418>] kmalloc_trace+0x34/0x80 [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8 [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4 [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764 [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4 [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440 [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4 [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508 [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c [<00000000b36425d1>] worker_thread+0x9c/0x634 [<0000000005852dd5>] kthread+0x1bc/0x1c4 [<000000005fccd770>] ret_from_fork+0x10/0x20 unreferenced object 0xffff000009051f00 (size 128): comm "kworker/u8:4", pid 67, jiffies 4295419553 (age 1836.440s) hex dump (first 32 bytes): 90 d6 92 0d 00 00 ff ff 00 d8 68 06 00 00 ff ff ..........h..... 36 27 92 e4 02 e0 01 00 00 58 79 06 00 00 ff ff 6'.......Xy..... backtrace: [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c [<00000000049bd418>] kmalloc_trace+0x34/0x80 [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8 [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4 [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764 [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4 [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440 [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4 [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508 [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c [<00000000b36425d1>] worker_thread+0x9c/0x634 [<0000000005852dd5>] kthread+0x1bc/0x1c4 [<000000005fccd770>] ret_from_fork+0x10/0x20 Fixes: 050ac52cbe1f ("mac80211: code for on-demand Hybrid Wireless Mesh Protocol") Signed-off-by: Nicolas Escande <nico.escande@gmail.com> Link: https://msgid.link/20240528142605.1060566-1-nico.escande@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-12wifi: mac80211: ensure beacon is non-S1G prior to extracting the beacon ↵Richard Kinder1-1/+2
timestamp field [ Upstream commit d12b9779cc9ba29d65fbfc728eb8a037871dd331 ] Logic inside ieee80211_rx_mgmt_beacon accesses the mgmt->u.beacon.timestamp field without first checking whether the beacon received is non-S1G format. Fix the problem by checking the beacon is non-S1G format to avoid access of the mgmt->u.beacon.timestamp field. Signed-off-by: Richard Kinder <richard.kinder@gmail.com> Link: https://msgid.link/20240328005725.85355-1-richard.kinder@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-12wifi: mac80211: don't use rate mask for scanningJohannes Berg3-5/+15
[ Upstream commit ab9177d83c040eba58387914077ebca56f14fae6 ] The rate mask is intended for use during operation, and can be set to only have masks for the currently active band. As such, it cannot be used for scanning which can be on other bands as well. Simply ignore the rate masks during scanning to avoid warnings from incorrect settings. Reported-by: syzbot+fdc5123366fb9c3fdc6d@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=fdc5123366fb9c3fdc6d Co-developed-by: Dmitry Antipov <dmantipov@yandex.ru> Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru> Tested-by: Dmitry Antipov <dmantipov@yandex.ru> Link: https://msgid.link/20240326220854.9594cbb418ca.I7f86c0ba1f98cf7e27c2bacf6c2d417200ecea5c@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-05-17wifi: mac80211: fix ieee80211_bss_*_flags kernel-docJeff Johnson1-2/+2
[ Upstream commit 774f8841f55d7ac4044c79812691649da203584a ] Running kernel-doc on ieee80211_i.h flagged the following: net/mac80211/ieee80211_i.h:145: warning: expecting prototype for enum ieee80211_corrupt_data_flags. Prototype was for enum ieee80211_bss_corrupt_data_flags instead net/mac80211/ieee80211_i.h:162: warning: expecting prototype for enum ieee80211_valid_data_flags. Prototype was for enum ieee80211_bss_valid_data_flags instead Fix these warnings. Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://msgid.link/20240314-kdoc-ieee80211_i-v1-1-72b91b55b257@quicinc.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-04-03wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changesFelix Fietkau1-3/+2
commit 4f2bdb3c5e3189297e156b3ff84b140423d64685 upstream. When moving a station out of a VLAN and deleting the VLAN afterwards, the fast_rx entry still holds a pointer to the VLAN's netdev, which can cause use-after-free bugs. Fix this by immediately calling ieee80211_check_fast_rx after the VLAN change. Cc: stable@vger.kernel.org Reported-by: ranygh@riseup.net Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://msgid.link/20240316074336.40442-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-03-27wifi: mac80211: only call drv_sta_rc_update for uploaded stationsFelix Fietkau1-1/+2
[ Upstream commit 413dafc8170fcb925fb17af8842f06af305f8e0b ] When a station has not been uploaded yet, receiving SMPS or channel width notification action frames can lead to rate_control_rate_update calling drv_sta_rc_update with uninitialized driver private data. Fix this by adding a missing check for sta->uploaded. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://msgid.link/20240221140535.16102-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-03-01wifi: mac80211: adding missing drv_mgd_complete_tx() callJohannes Berg1-0/+1
[ Upstream commit c042600c17d8c490279f0ae2baee29475fe8047d ] There's a call to drv_mgd_prepare_tx() and so there should be one to drv_mgd_complete_tx(), but on this path it's not. Add it. Link: https://msgid.link/20240131164824.2f0922a514e1.I5aac89b93bcead88c374187d70cad0599d29d2c8@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-03-01wifi: mac80211: set station RX-NSS on reconfigJohannes Berg1-0/+2
[ Upstream commit dd6c064cfc3fc18d871107c6f5db8837e88572e4 ] When a station is added/reconfigured by userspace, e.g. a TDLS peer or a SoftAP client STA, rx_nss is currently not always set, so that it might be left zero. Set it up properly. Link: https://msgid.link/20240129155354.98f148a3d654.I193a02155f557ea54dc9d0232da66cf96734119a@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-03-01wifi: mac80211: fix race condition on enabling fast-xmitFelix Fietkau2-1/+3
[ Upstream commit bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f ] fast-xmit must only be enabled after the sta has been uploaded to the driver, otherwise it could end up passing the not-yet-uploaded sta via drv_tx calls to the driver, leading to potential crashes because of uninitialized drv_priv data. Add a missing sta->uploaded check and re-check fast xmit after inserting a sta. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://msgid.link/20240104181059.84032-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-02-23wifi: mac80211: reload info pointer in ieee80211_tx_dequeue()Johannes Berg1-2/+3
commit c98d8836b817d11fdff4ca7749cbbe04ff7f0c64 upstream. This pointer can change here since the SKB can change, so we actually later open-coded IEEE80211_SKB_CB() again. Reload the pointer where needed, so the monitor-mode case using it gets fixed, and then use info-> later as well. Cc: stable@vger.kernel.org Fixes: 531682159092 ("mac80211: fix VLAN handling with TXQs") Link: https://msgid.link/20240131164910.b54c28d583bc.I29450cec84ea6773cff5d9c16ff92b836c331471@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-02-16wifi: mac80211: fix waiting for beacons logicJohannes Berg1-2/+1
[ Upstream commit a0b4f2291319c5d47ecb196b90400814fdcfd126 ] This should be waiting if we don't have a beacon yet, but somehow I managed to invert the logic. Fix that. Fixes: 74e1309acedc ("wifi: mac80211: mlme: look up beacon elems only if needed") Link: https://msgid.link/20240131164856.922701229546.I239b379e7cee04608e73c016b737a5245e5b23dd@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-02-01wifi: mac80211: fix potential sta-link leakJohannes Berg1-1/+4
[ Upstream commit b01a74b3ca6fd51b62c67733ba7c3280fa6c5d26 ] When a station is allocated, links are added but not set to valid yet (e.g. during connection to an AP MLD), we might remove the station without ever marking links valid, and leak them. Fix that. Fixes: cb71f1d136a6 ("wifi: mac80211: add sta link addition/removal") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Reviewed-by: Ilan Peer <ilan.peer@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20240111181514.6573998beaf8.I09ac2e1d41c80f82a5a616b8bd1d9d8dd709a6a6@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-20wifi: mac80211: handle 320 MHz in ieee80211_ht_cap_ie_to_sta_ht_capBen Greear1-0/+1
[ Upstream commit 00f7d153f3358a7c7e35aef66fcd9ceb95d90430 ] The new 320 MHz channel width wasn't handled, so connecting a station to a 320 MHz AP would limit the station to 20 MHz (on HT) after a warning, handle 320 MHz to fix that. Signed-off-by: Ben Greear <greearb@candelatech.com> Link: https://lore.kernel.org/r/20231109182201.495381-1-greearb@candelatech.com [write a proper commit message] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-01wifi: mac80211: mesh_plink: fix matches_local logicJohannes Berg1-5/+5
[ Upstream commit 8c386b166e2517cf3a123018e77941ec22625d0f ] During refactoring the "else" here got lost, add it back. Fixes: c99a89edb106 ("mac80211: factor out plink event gathering") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20231211085121.795480fa0e0b.I017d501196a5bbdcd9afd33338d342d6fe1edd79@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-01wifi: mac80211: mesh: check element parsing succeededJohannes Berg1-2/+4
[ Upstream commit 1fc4a3eec50d726f4663ad3c0bb0158354d6647a ] ieee802_11_parse_elems() can return NULL, so we must check for the return value. Fixes: 5d24828d05f3 ("mac80211: always allocate struct ieee802_11_elems") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20231211085121.93dea364f3d3.Ie87781c6c48979fb25a744b90af4a33dc2d83a28@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-01wifi: mac80211: check if the existing link config remains unchangedEdward Adam Davis1-2/+2
[ Upstream commit c1393c132b906fbdf91f6d1c9eb2ef7a00cce64e ] [Syz report] WARNING: CPU: 1 PID: 5067 at net/mac80211/rate.c:48 rate_control_rate_init+0x540/0x690 net/mac80211/rate.c:48 Modules linked in: CPU: 1 PID: 5067 Comm: syz-executor413 Not tainted 6.7.0-rc3-syzkaller-00014-gdf60cee26a2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:rate_control_rate_init+0x540/0x690 net/mac80211/rate.c:48 Code: 48 c7 c2 00 46 0c 8c be 08 03 00 00 48 c7 c7 c0 45 0c 8c c6 05 70 79 0b 05 01 e8 1b a0 6f f7 e9 e0 fd ff ff e8 61 b3 8f f7 90 <0f> 0b 90 e9 36 ff ff ff e8 53 b3 8f f7 e8 5e 0b 78 f7 31 ff 89 c3 RSP: 0018:ffffc90003c57248 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888016bc4000 RCX: ffffffff89f7d519 RDX: ffff888076d43b80 RSI: ffffffff89f7d6df RDI: 0000000000000005 RBP: ffff88801daaae20 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888020030e20 R15: ffff888078f08000 FS: 0000555556b94380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005fdeb8 CR3: 0000000076d22000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sta_apply_auth_flags.constprop.0+0x4b7/0x510 net/mac80211/cfg.c:1674 sta_apply_parameters+0xaf1/0x16c0 net/mac80211/cfg.c:2002 ieee80211_add_station+0x3fa/0x6c0 net/mac80211/cfg.c:2068 rdev_add_station net/wireless/rdev-ops.h:201 [inline] nl80211_new_station+0x13ba/0x1a70 net/wireless/nl80211.c:7603 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:972 genl_family_rcv_msg net/netlink/genetlink.c:1052 [inline] genl_rcv_msg+0x561/0x800 net/netlink/genetlink.c:1067 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b [Analysis] It is inappropriate to make a link configuration change judgment on an non-existent and non new link. [Fix] Quickly exit when there is a existent link and the link configuration has not changed. Fixes: b303835dabe0 ("wifi: mac80211: accept STA changes without link changes") Reported-and-tested-by: syzbot+62d7eef57b09bfebcd84@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis <eadavis@qq.com> Link: https://msgid.link/tencent_DE67FF86DB92ED465489A36ECD2EDDCC8C06@qq.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-28wifi: mac80211: don't return unset power in ieee80211_get_tx_power()Ping-Ke Shih1-0/+4
[ Upstream commit e160ab85166e77347d0cbe5149045cb25e83937f ] We can get a UBSAN warning if ieee80211_get_tx_power() returns the INT_MIN value mac80211 internally uses for "unset power level". UBSAN: signed-integer-overflow in net/wireless/nl80211.c:3816:5 -2147483648 * 100 cannot be represented in type 'int' CPU: 0 PID: 20433 Comm: insmod Tainted: G WC OE Call Trace: dump_stack+0x74/0x92 ubsan_epilogue+0x9/0x50 handle_overflow+0x8d/0xd0 __ubsan_handle_mul_overflow+0xe/0x10 nl80211_send_iface+0x688/0x6b0 [cfg80211] [...] cfg80211_register_wdev+0x78/0xb0 [cfg80211] cfg80211_netdev_notifier_call+0x200/0x620 [cfg80211] [...] ieee80211_if_add+0x60e/0x8f0 [mac80211] ieee80211_register_hw+0xda5/0x1170 [mac80211] In this case, simply return an error instead, to indicate that no data is available. Cc: Zong-Zhe Yang <kevin_yang@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://lore.kernel.org/r/20230203023636.4418-1-pkshih@realtek.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20wifi: mac80211: fix # of MSDU in A-MSDU calculationJohannes Berg1-1/+1
[ Upstream commit 428e8976a15f849ad92b1c1e38dda2a684350ff7 ] During my refactoring I wanted to get rid of the switch, but replaced it with the wrong calculation. Fix that. Fixes: 175ad2ec89fe ("wifi: mac80211: limit A-MSDU subframes for client too") Reported-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230827135854.51bf1b8b0adb.Iffbd337fdad2b86ae12f5a39c69fb82b517f7486@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20wifi: mac80211: move sched-scan stop work to wiphy workJohannes Berg3-8/+10
[ Upstream commit eadfb54756aea5610d8d0a467f66305f777c85dd ] This also has the wiphy locked here then. We need to use the _locked version of cfg80211_sched_scan_stopped() now, which also fixes an old deadlock there. Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver") Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20wifi: mac80211: move offchannel works to wiphy workJohannes Berg3-23/+23
[ Upstream commit 97c19e42b264e6b71a9ff9deea04c19f621805b9 ] Make the offchannel works wiphy works to have the wiphy locked for executing them. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: eadfb54756ae ("wifi: mac80211: move sched-scan stop work to wiphy work") Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20wifi: mac80211: move scan work to wiphy workJohannes Berg5-25/+18
[ Upstream commit 201712512cbbda360f62c222a4bab260350462a0 ] Move the scan work to wiphy work, which also simplifies the way we handle the work vs. the scan configuration. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: eadfb54756ae ("wifi: mac80211: move sched-scan stop work to wiphy work") Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20wifi: mac80211: move radar detect work to wiphy workJohannes Berg3-10/+11
[ Upstream commit 228e4f931b0e630dacca8dd867ddd863aea53913 ] Move the radar detect work to wiphy work in order to lock the wiphy for it without doing it manually. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Stable-dep-of: eadfb54756ae ("wifi: mac80211: move sched-scan stop work to wiphy work") Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-25wifi: mac80211: allow transmitting EAPOL frames with tainted keyWen Gong1-1/+2
[ Upstream commit 61304336c67358d49a989e5e0060d8c99bad6ca8 ] Lower layer device driver stop/wake TX by calling ieee80211_stop_queue()/ ieee80211_wake_queue() while hw scan. Sometimes hw scan and PTK rekey are running in parallel, when M4 sent from wpa_supplicant arrive while the TX queue is stopped, then the M4 will pending send, and then new key install from wpa_supplicant. After TX queue wake up by lower layer device driver, the M4 will be dropped by below call stack. When key install started, the current key flag is set KEY_FLAG_TAINTED in ieee80211_pairwise_rekey(), and then mac80211 wait key install complete by lower layer device driver. Meanwhile ieee80211_tx_h_select_key() will return TX_DROP for the M4 in step 12 below, and then ieee80211_free_txskb() called by ieee80211_tx_dequeue(), so the M4 will not send and free, then the rekey process failed becaue AP not receive M4. Please see details in steps below. There are a interval between KEY_FLAG_TAINTED set for current key flag and install key complete by lower layer device driver, the KEY_FLAG_TAINTED is set in this interval, all packet including M4 will be dropped in this interval, the interval is step 8~13 as below. issue steps: TX thread install key thread 1. stop_queue -idle- 2. sending M4 -idle- 3. M4 pending -idle- 4. -idle- starting install key from wpa_supplicant 5. -idle- =>ieee80211_key_replace() 6. -idle- =>ieee80211_pairwise_rekey() and set currently key->flags |= KEY_FLAG_TAINTED 7. -idle- =>ieee80211_key_enable_hw_accel() 8. -idle- =>drv_set_key() and waiting key install complete from lower layer device driver 9. wake_queue -waiting state- 10. re-sending M4 -waiting state- 11. =>ieee80211_tx_h_select_key() -waiting state- 12. drop M4 by KEY_FLAG_TAINTED -waiting state- 13. -idle- install key complete with success/fail success: clear flag KEY_FLAG_TAINTED fail: start disconnect Hence add check in step 11 above to allow the EAPOL send out in the interval. If lower layer device driver use the old key/cipher to encrypt the M4, then AP received/decrypt M4 correctly, after M4 send out, lower layer device driver install the new key/cipher to hardware and return success. If lower layer device driver use new key/cipher to send the M4, then AP will/should drop the M4, then it is same result with this issue, AP will/ should kick out station as well as this issue. issue log: kworker/u16:4-5238 [000] 6456.108926: stop_queue: phy1 queue:0, reason:0 wpa_supplicant-961 [003] 6456.119737: rdev_tx_control_port: wiphy_name=phy1 name=wlan0 ifindex=6 dest=ARRAY[9e, 05, 31, 20, 9b, d0] proto=36488 unencrypted=0 wpa_supplicant-961 [003] 6456.119839: rdev_return_int_cookie: phy1, returned 0, cookie: 504 wpa_supplicant-961 [003] 6456.120287: rdev_add_key: phy1, netdev:wlan0(6), key_index: 0, mode: 0, pairwise: true, mac addr: 9e:05:31:20:9b:d0 wpa_supplicant-961 [003] 6456.120453: drv_set_key: phy1 vif:wlan0(2) sta:9e:05:31:20:9b:d0 cipher:0xfac04, flags=0x9, keyidx=0, hw_key_idx=0 kworker/u16:9-3829 [001] 6456.168240: wake_queue: phy1 queue:0, reason:0 kworker/u16:9-3829 [001] 6456.168255: drv_wake_tx_queue: phy1 vif:wlan0(2) sta:9e:05:31:20:9b:d0 ac:0 tid:7 kworker/u16:9-3829 [001] 6456.168305: cfg80211_control_port_tx_status: wdev(1), cookie: 504, ack: false wpa_supplicant-961 [003] 6459.167982: drv_return_int: phy1 - -110 issue call stack: nl80211_frame_tx_status+0x230/0x340 [cfg80211] cfg80211_control_port_tx_status+0x1c/0x28 [cfg80211] ieee80211_report_used_skb+0x374/0x3e8 [mac80211] ieee80211_free_txskb+0x24/0x40 [mac80211] ieee80211_tx_dequeue+0x644/0x954 [mac80211] ath10k_mac_tx_push_txq+0xac/0x238 [ath10k_core] ath10k_mac_op_wake_tx_queue+0xac/0xe0 [ath10k_core] drv_wake_tx_queue+0x80/0x168 [mac80211] __ieee80211_wake_txqs+0xe8/0x1c8 [mac80211] _ieee80211_wake_txqs+0xb4/0x120 [mac80211] ieee80211_wake_txqs+0x48/0x80 [mac80211] tasklet_action_common+0xa8/0x254 tasklet_action+0x2c/0x38 __do_softirq+0xdc/0x384 Signed-off-by: Wen Gong <quic_wgong@quicinc.com> Link: https://lore.kernel.org/r/20230801064751.25803-1-quic_wgong@quicinc.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-25wifi: mac80211: work around Cisco AP 9115 VHT MPDU lengthJohannes Berg6-7/+44
[ Upstream commit 084cf2aeca97566db4fa15d55653c1cba2db83ed ] Cisco AP module 9115 with FW 17.3 has a bug and sends a too large maximum MPDU length in the association response (indicating 12k) that it cannot actually process. Work around that by taking the minimum between what's in the association response and the BSS elements (from beacon or probe response). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230918140607.d1966a9a532e.I090225babb7cd4d1081ee9acd40e7de7e41c15ae@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-10wifi: mac80211: fix potential key use-after-freeJohannes Berg2-1/+4
[ Upstream commit 31db78a4923ef5e2008f2eed321811ca79e7f71b ] When ieee80211_key_link() is called by ieee80211_gtk_rekey_add() but returns 0 due to KRACK protection (identical key reinstall), ieee80211_gtk_rekey_add() will still return a pointer into the key, in a potential use-after-free. This normally doesn't happen since it's only called by iwlwifi in case of WoWLAN rekey offload which has its own KRACK protection, but still better to fix, do that by returning an error code and converting that to success on the cfg80211 boundary only, leaving the error for bad callers of ieee80211_gtk_rekey_add(). Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Fixes: fdf7cb4185b6 ("mac80211: accept key reinstall without changing anything") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-09-23wifi: mac80211: check for station first in client probeJohannes Berg1-7/+8
[ Upstream commit 67dfa589aa8806c7959cbca2f4613b8d41c75a06 ] When probing a client, first check if we have it, and then check for the channel context, otherwise you can trigger the warning there easily by probing when the AP isn't even started yet. Since a client existing means the AP is also operating, we can then keep the warning. Also simplify the moved code a bit. Reported-by: syzbot+999fac712d84878a7379@syzkaller.appspotmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-18 21:06:35 +0300