Bug 214531 - Linux 5.14 breaks wlan-ap traffic between wlan devices
Summary: Linux 5.14 breaks wlan-ap traffic between wlan devices
Status: NEW
Alias: None
Product: Networking
Classification: Unclassified
Component: Wireless (show other bugs)
Hardware: Intel Linux
: P1 high
Assignee: networking_wireless@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-09-26 20:00 UTC by Reindl Harald
Modified: 2021-10-11 09:57 UTC (History)
0 users

See Also:
Kernel Version: 5.14.x
Subsystem:
Regression: No
Bisected commit-id:


Attachments

Description Reindl Harald 2021-09-26 20:00:44 UTC
see also https://bugzilla.redhat.com/show_bug.cgi?id=2007974

Bridge: br-lan
Wireless: wlan0 with hostapd

smartphone (wlan) can talk to tv (ethernet)
smartphone (wlan) can talk to internet
smartphone (wlan) can talk to host
smartphone (wlan) can *no longer* talk to avr (wlan)
smartphone (lwan) can *no longer* talk to blueray-player (wlan)

no connection from yamaha AVR app to RX-A880 receiver
no ping from smartphone to RX-A880 receiver

from the host running the bridge and hostapd i can ping and connect to any other device no matter if it's wlan or ethernet

in mordern networks with only smartphones and notebooks this would be a showstopper

5.14.7-200.fc34.x86_64

--------------------------

reboot with 5.13.19 and all works as the years before, every device can talk to any other device no matter if it's connected to the ethernet bridge or via wlan on the same hostapd access point

--------------------------

[root@srv-rhsoft:~]$ cat /etc/hostapd/hostapd.conf
bssid=02:ab:cd:ef:12:30
driver=nl80211
hw_mode=g
country_code=AT
channel=acs_survey

ctrl_interface=/run/hostapd
ctrl_interface_group=0

################################################################
# wlan0                                                        #
################################################################

interface=wlan0

ssid=rhsoft-hardened
wpa_passphrase=******

bridge=br-lan
wpa=2
rsn_pairwise=CCMP

logger_syslog=-1
logger_syslog_level=2

ieee80211ac=1
ieee80211d=1
ieee80211h=1
ieee80211n=1
wme_enabled=1
wmm_enabled=1

require_ht=1
ht_capab=[HT20][HT40][SHORT-GI-40][DSSS_CCK-40][MAX-AMSDU-3839]

################################################################
# wlan1                                                        #
################################################################

bss=wlan1

ssid=rhsoft-guest
wpa_passphrase=******

bridge=br-guest
wpa=2
rsn_pairwise=CCMP

logger_syslog=-1
logger_syslog_level=2

ieee80211ac=1
ieee80211d=1
ieee80211h=1
ieee80211n=1
wme_enabled=1
wmm_enabled=1

require_ht=1
ht_capab=[HT20][HT40][SHORT-GI-40][DSSS_CCK-40][MAX-AMSDU-3839]

--------------------------

[root@srv-rhsoft:~]$ /usr/sbin/ip link show master br-lan
2: poe-spare: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel master br-lan state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:e0:4c:80:5c:ca brd ff:ff:ff:ff:ff:ff
    altname enp5s0
3: poe-phone: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br-lan state UP mode DEFAULT group default qlen 1000
    link/ether 00:e0:4c:80:5c:cb brd ff:ff:ff:ff:ff:ff
    altname enp6s0
6: lan-spare2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br-lan state DOWN mode DEFAULT group default qlen 1000
    link/ether ac:16:2d:a1:74:ed brd ff:ff:ff:ff:ff:ff
    altname enp1s0f1
7: lan-spare1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br-lan state DOWN mode DEFAULT group default qlen 1000
    link/ether ac:16:2d:a1:74:ee brd ff:ff:ff:ff:ff:ff
    altname enp1s0f2
8: lan-tv: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br-lan state DOWN mode DEFAULT group default qlen 1000
    link/ether ac:16:2d:a1:74:ef brd ff:ff:ff:ff:ff:ff
    altname enp1s0f3
9: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br-lan state UP mode DEFAULT group default qlen 1000
    link/ether 02:ab:cd:ef:12:30 brd ff:ff:ff:ff:ff:ff permaddr 28:10:7b:ca:be:51
    altname wlp2s0

--------------------------

02:00.0 Network controller: Qualcomm Atheros AR5418 Wireless Network Adapter [AR5008E 802.11(a)bgn] (PCI-Express) (rev 01)
        Subsystem: D-Link System Inc DWA-556 Xtreme N PCI Express Desktop Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at f7b00000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [40] Power Management version 2
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
        Capabilities: [60] Express Legacy Endpoint, MSI 00
        Capabilities: [90] MSI-X: Enable- Count=1 Masked-
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Kernel driver in use: ath9k
        Kernel modules: ath9k
Comment 1 Reindl Harald 2021-10-11 09:57:22 UTC
5.14.11-200.fc34.x86_64 seems to fix the problem, maybe it's one of the mac80211 relevant changes in 5.14.10 but none of the changelogs at kernel.org from 5.14.9 to 5.14.11 really explains the fix - at least for me

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