When rhashtable_init() fails, it returns -EINVAL.
However, since error return value of rhashtable_init is not checked,
it can cause use of uninitialized pointers.
So, fix unhandled errors of rhashtable_init.
Signed-off-by: MichelleJin <shjy180909@gmail.com>
Link: https://lore.kernel.org/r/20210927033457.1020967-4-shjy180909@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When PN checking is done in mac80211, for fragmentation we need
to copy the PN to the RX struct so we can later use it to do a
comparison, since commit bf30ca922a ("mac80211: check defrag
PN against current frame").
Unfortunately, in that commit I used the 'hdr' variable without
it being necessarily valid, so use-after-free could occur if it
was necessary to reallocate (parts of) the frame.
Fix this by reloading the variable after the code that results
in the reallocations, if any.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
Cc: stable@vger.kernel.org
Fixes: bf30ca922a ("mac80211: check defrag PN against current frame")
Link: https://lore.kernel.org/r/20210927115838.12b9ac6bb233.I1d066acd5408a662c3b6e828122cd314fcb28cdb@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
WARNING: CPU: 1 PID: 9 at net/mac80211/sta_info.c:554
sta_info_insert_rcu+0x121/0x12a0
Modules linked in:
CPU: 1 PID: 9 Comm: kworker/u8:1 Not tainted 5.14.0-rc7+ #253
Workqueue: phy3 ieee80211_iface_work
RIP: 0010:sta_info_insert_rcu+0x121/0x12a0
...
Call Trace:
ieee80211_ibss_finish_sta+0xbc/0x170
ieee80211_ibss_work+0x13f/0x7d0
ieee80211_iface_work+0x37a/0x500
process_one_work+0x357/0x850
worker_thread+0x41/0x4d0
If an Ad-Hoc node receives packets with invalid source MAC address,
it hits a WARN_ON in sta_info_insert_check(), this can spam the log.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20210827144230.39944-1-yuehaibing@huawei.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In ieee80211_amsdu_aggregate() set a pointer frag_tail point to the
end of skb_shinfo(head)->frag_list, and use it to bind other skb in
the end of this function. But when execute ieee80211_amsdu_aggregate()
->ieee80211_amsdu_realloc_pad()->pskb_expand_head(), the address of
skb_shinfo(head)->frag_list will be changed. However, the
ieee80211_amsdu_aggregate() not update frag_tail after call
pskb_expand_head(). That will cause the second skb can't bind to the
head skb appropriately.So we update the address of frag_tail to fix it.
Fixes: 6e0456b545 ("mac80211: add A-MSDU tx support")
Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20210830073240.12736-1-pkshih@realtek.com
[reword comment]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This reverts commit d333322361 ("mac80211: do not use low data rates for
data frames with no ack flag").
Returning false early in rate_control_send_low breaks sending broadcast
packets, since rate control will not select a rate for it.
Before re-introducing a fixed version of this patch, we should probably also
make some changes to rate control to be more conservative in selecting rates
for no-ack packets and also prevent using probing rates on them, since we won't
get any feedback.
Fixes: d333322361 ("mac80211: do not use low data rates for data frames with no ack flag")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210906083559.9109-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Introduce TWT action frames parsing support to mac80211.
Currently just individual TWT agreement are support in AP mode.
Whenever the AP receives a TWT action frame from an associated client,
after performing sanity checks, it will notify the underlay driver with
requested parameters in order to check if they are supported and if there
is enough room for a new agreement. The driver is expected to set the
agreement result and report it to mac80211.
Drivers supporting this have two new callbacks:
- add_twt_setup (mandatory)
- twt_teardown_request (optional)
mac80211 will send an action frame reply according to the result
reported by the driver.
Tested-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/257512f2e22ba42b9f2624942a128dd8f141de4b.1629741512.git.lorenzo@kernel.org
[use le16p_replace_bits(), minor cleanups, use (void *) casts,
fix to use ieee80211_get_he_iftype_cap() correctly]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* BSS coloring support
* MEI commands for Intel platforms
* various fixes/cleanups
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Merge tag 'mac80211-next-for-net-next-2021-08-20' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
Minor updates:
* BSS coloring support
* MEI commands for Intel platforms
* various fixes/cleanups
* tag 'mac80211-next-for-net-next-2021-08-20' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next:
cfg80211: fix BSS color notify trace enum confusion
mac80211: Fix insufficient headroom issue for AMSDU
mac80211: add support for BSS color change
nl80211: add support for BSS coloring
mac80211: Use flex-array for radiotap header bitmap
mac80211: radiotap: Use BIT() instead of shifts
mac80211: Remove unnecessary variable and label
mac80211: include <linux/rbtree.h>
mac80211: Fix monitor MTU limit so that A-MSDUs get through
mac80211: remove unnecessary NULL check in ieee80211_register_hw()
mac80211: Reject zero MAC address in sta_info_insert_check()
nl80211: vendor-cmd: add Intel vendor commands for iwlmei usage
====================
Link: https://lore.kernel.org/r/20210820105329.48674-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The color change announcement is very similar to how CSA works where
we have an IE that includes a counter. When the counter hits 0, the new
color is applied via an updated beacon.
This patch makes the CSA counter functionality reusable, rather than
implementing it again. This also allows for future reuse incase support
for other counter IEs gets added.
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/057c1e67b82bee561ea44ce6a45a8462d3da6995.1625247619.git.lorenzo@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally writing across neighboring fields.
The it_present member of struct ieee80211_radiotap_header is treated as a
flexible array (multiple u32s can be conditionally present). In order for
memcpy() to reason (or really, not reason) about the size of operations
against this struct, use of bytes beyond it_present need to be treated
as part of the flexible array. Add a trailing flexible array and
initialize its initial index via pointer arithmetic.
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210806215305.2875621-1-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The variable ret and label just used as return, so we delete it and
use the return statement instead of the goto statement.
Signed-off-by: dingsenjie <dingsenjie@yulong.com>
Link: https://lore.kernel.org/r/20210805064349.202148-1-dingsenjie@163.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The maximum MTU was set to 2304, which is the maximum MSDU size. While
this is valid for normal WLAN interfaces, it is too low for monitor
interfaces. A monitor interface may receive and inject MPDU frames, and
the maximum MPDU frame size is larger than 2304. The MPDU may also
contain an A-MSDU frame, in which case the size may be much larger than
the MTU limit. Since the maximum size of an A-MSDU depends on the PHY
mode of the transmitting STA, it is not possible to set an exact MTU
limit for a monitor interface. Now the maximum MTU for a monitor
interface is unrestricted.
Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Link: https://lore.kernel.org/r/20210628123246.2070558-1-johan.almbladh@anyfinetworks.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The address "&sband->iftype_data[i]" points to an array at the end of
struct. It can't be NULL and so the check can be removed.
Fixes: bac2fd3d75 ("mac80211: remove use of ieee80211_get_he_sta_cap()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YNmgHi7Rh3SISdog@mwanda
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
As commit 52dba8d7d5 ("mac80211: reject zero MAC address in add station")
said, we don't consider all-zeroes to be a valid MAC address in most places,
so also reject it here.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20210626130334.13624-1-yuehaibing@huawei.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Notify the driver about the 4-address mode change and also send a nulldata
packet to the AP to notify it about the change
Fixes: 1ff4e8f2de ("mac80211: notify the driver when a sta uses 4-address mode")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210702050111.47546-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The logic for starting aggregation sessions was recently moved from minstrel_ht
to mac80211, into the subif tx handler just after the sta lookup.
Unfortunately this didn't work for mesh interfaces, since the sta lookup is
deferred until a much later point in time on those.
Fix this by also calling the aggregation check right after the deferred sta
lookup.
Fixes: 08a46c6420 ("mac80211: move A-MPDU session check from minstrel_ht to mac80211")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210629112853.29785-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When a monitor interface is present together with other interfaces, a
received skb is copied and received on the monitor netdev. Before, the
copied skb was allocated with exactly the amount of space needed for
the radiotap header, resulting in an skb without any headroom at all
being received on the monitor netdev. With the introduction of eBPF
and XDP in the kernel, skbs may be processed by custom eBPF programs.
However, since the skb cannot be reallocated in the eBPF program, no
more data or headers can be pushed. The old code made sure the final
headroom was zero regardless of the value of NET_SKB_PAD, so increasing
that constant would have no effect.
Now we allocate monitor skb copies with a headroom of NET_SKB_PAD bytes
before the radiotap header. Monitor interfaces now behave in the same
way as other netdev interfaces that honor the NET_SKB_PAD constant.
Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Link: https://lore.kernel.org/r/20210628123713.2070753-1-johan.almbladh@anyfinetworks.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This switches the airtime scheduler in mac80211 to use a virtual
time-based scheduler instead of the round-robin scheduler used before.
This has a couple of advantages:
- No need to sync up the round-robin scheduler in firmware/hardware with
the round-robin airtime scheduler.
- If several stations are eligible for transmission we can schedule both
of them; no need to hard-block the scheduling rotation until the head
of the queue has used up its quantum.
- The check of whether a station is eligible for transmission becomes
simpler (in ieee80211_txq_may_transmit()).
The drawback is that scheduling becomes slightly more expensive, as we
need to maintain an rbtree of TXQs sorted by virtual time. This means
that ieee80211_register_airtime() becomes O(logN) in the number of
currently scheduled TXQs because it can change the order of the
scheduled stations. We mitigate this overhead by only resorting when a
station changes position in the tree, and hopefully N rarely grows too
big (it's only TXQs currently backlogged, not all associated stations),
so it shouldn't be too big of an issue.
To prevent divisions in the fast path, we maintain both station sums and
pre-computed reciprocals of the sums. This turns the fast-path operation
into a multiplication, with divisions only happening as the number of
active stations change (to re-compute the current sum of all active
station weights). To prevent this re-computation of the reciprocal from
happening too frequently, we use a time-based notion of station
activity, instead of updating the weight every time a station gets
scheduled or de-scheduled. As queues can oscillate between empty and
occupied quite frequently, this can significantly cut down on the number
of re-computations. It also has the added benefit of making the station
airtime calculation independent on whether the queue happened to have
drained at the time an airtime value was accounted.
Co-developed-by: Yibo Zhao <yiboz@codeaurora.org>
Signed-off-by: Yibo Zhao <yiboz@codeaurora.org>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20210623134755.235545-1-toke@redhat.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This reverts commit f39b07fdfb ("mac80211: HE STA disassoc
due to QOS NULL not sent")
Since iwlwifi specific workaround, which blocks to send NDP,
is removed, we can revert this commit.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20210623134826.10318-2-pkshih@realtek.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Remove the remaining workaround that is not removed by the
commit e41eb3e408 ("mac80211: remove iwlwifi specific workaround
that broke sta NDP tx")
Fixes: 41cbb0f5a2 ("mac80211: add support for HE")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20210623134826.10318-1-pkshih@realtek.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
"sband->iftype_data" is not assigned with any value for non HE supported
devices, which causes NULL pointer access during mesh peer connection
in those devices. Fix this by accessing the pointer after HE
capabilities condition check.
Cc: stable@vger.kernel.org
Fixes: 7f7aa94bca (mac80211: reduce peer HE MCS/NSS to own capabilities)
Signed-off-by: Abinaya Kalaiselvan <akalaise@codeaurora.org>
Link: https://lore.kernel.org/r/1624459244-4497-1-git-send-email-akalaise@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Trigger dynamic_ps_timer to re-evaluate power saving once a null
function packet (with PM = 1) is ACKed, otherwise dynamic PS is
not enabled at that point.
Signed-off-by: Bassem Dawood <bassem@morsemicro.com>
Link: https://lore.kernel.org/r/20210227055815.14838-1-bassem@morsemicro.com
[reformatting]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
We have mgd_prepare_tx(), but sometimes drivers may want/need
to take action when the exchange finishes, whether successfully
or not.
Add a notification to the driver on completion, i.e. call the
new method mgd_complete_tx().
To unify the two scenarios, and to add more information, make
both of them take a struct that has the duration (prepare only),
subtype (both) and success (complete only).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.5d94e78f6230.I6dc979606b6f28701b740d7aab725f7853a5a155@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If HE/6GHz is available (thus we consider dot11HE6GOptionImplemented
to be true), then always include the corresponding capability in the
probe request as required by the spec.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.25ee4a54a7d0.I8cebd799c85524c8123a11941a104dbdefc03762@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When sending an association request, add any vendor specific
capabilities at the end of the frame. This way, mac80211 is
still completely in charge of building the frame, but drivers
can determine what should be added depending on the band and
interface type.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.80d716d69a5f.I28097ff19be6b22aebdc33a72795d2662755d41f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
While building probe requests, only enable HE capability if
there are actually any channels in the band with HE enabled,
otherwise we're not really capable. We're doing the same in
association requests, so doing it here makes it consistent.
This also makes HE not appear available if it isn't due to
regulatory constraints.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.b5513f2af335.Ic01862678712ae4238cea43ad2185928865efad2@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
All uses of ieee80211_get_he_sta_cap() were actually wrong,
in net/mac80211/mlme.c they were wrong because that code is
also used for P2P (which is a different interface type), in
net/mac80211/main.c that should check all interface types.
Fix all that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.ede114bc8b46.Ibcd9a5d98430e936344eb6d242ef8a65c2f59b74@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If the AP changes capability/bandwidth in some fashion, the
message might be somewhat misleading and we don't know what
really changed. Modify the message to speak about "caps/bw"
instead of just "bandwidth", and print out the flags.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.dc22c48985fa.I4bf5fbc17ec783c21d4b50c8c35b1de390896ccd@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The following race was possible:
1. The device driver requests HW restart.
2. A scan is requested from user space and is propagated
to the driver. During this flow HW_SCANNING flag is set.
3. The thread that handles the HW restart is scheduled,
and before starting the actual reconfiguration it
checks that HW_SCANNING is not set. The flow does so
without acquiring any lock, and thus the WARN fires.
Fix this by checking that HW_SCANNING is on only after RTNL is
acquired, i.e., user space scan request handling is no longer
in transit.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.8238ab3e19ab.I2693c581c70251472b4f9089e37e06fb2c18268f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
chanctx represents the current phy configuration and rate scale uses
it for achieving max throughput, so if phy changes bandwidth to narrow
bandwidth, RC should be _first_ updated to avoid using the wider bandwidth
before updating the phy, and vice versa.
We assume in the patch that station interface is always updated before
updating phy context by calling ieee80211_vif_update_chandef.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.fc4e24496aa2.Ic40ea947c2f65739ea4b5fe3babd0a544240ced6@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If, for some strange reason, ieee80211_wep_encrypt() fails in
ieee80211_send_auth() free the SKB instead of sending out the
useless frame, in addition to the warning. This can't really
happen since the SKB was freshly allocated.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.98f058d7a8b2.Ie605e6a10e72eae02f5734032826af48b85b6d11@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
ieee80211_mgd_assoc calls ieee80211_prep_connection which
might call ieee80211_prep_channel and set smps_mode to OFF.
That will override the previous setting of smps_mode in
ieee80211_mgd_assoc and HT SMPS will be set to "disabled"
in the association request frame.
Move the setting of smps_mode in ieee80211_mgd_assoc to
after the call to ieee80211_prep_connection.
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.d8e5cc4b527f.Icf3a67fffbdd8c408c0cadfe43f8f4cffdc90acb@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Sending nulldata packets is important for sw AP link probing and detecting
4-address mode links. The checks that dropped these packets were apparently
added to work around an iwlwifi firmware bug with multi-TID aggregation.
Fixes: 41cbb0f5a2 ("mac80211: add support for HE")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210619101517.90806-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
offload_flags has been introduced to indicate encap status of each interface.
An interface can encap offload at runtime, or if it has some extra limitations
it can simply override the flags, so it's more flexible to check offload_flags
in Tx path.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Link: https://lore.kernel.org/r/177785418cf407808bf3a44760302d0647076990.1623961575.git.ryder.lee@mediatek.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Make ieee80211_tx_h_rate_ctrl() get called on dequeue to improve
performance since it reduces the turnaround time for rate control.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Link: https://lore.kernel.org/r/20210617163113.75815-2-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This avoids calling back into tx handlers from within the rate control module.
Preparation for deferring rate control until tx dequeue
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210617163113.75815-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
