Lukas Redlinger <rel+kernel@xxxxxxxxxx> writes: > Hello, > > on Arch Linux 5.2.11 with wpa_supplicant 2.8 / 2.9 our systems > increasingly show this issue: > > [72770.969617] BUG: using smp_processor_id() in preemptible [00000000] > code: wpa_supplicant/16207 > [72770.969638] caller is ieee80211_xmit_fast_finish+0x5a/0x1e0 [mac80211] > [72770.969640] CPU: 2 PID: 16207 Comm: wpa_supplicant Tainted: G > W 5.2.11-arch1-1-ARCH #1 > [72770.969641] Hardware name: CINCOZE DI-1000/DI-1000, BIOS 5.11 02/20/2019 > [72770.969642] Call Trace: > [72770.969647] dump_stack+0x5c/0x80 > [72770.969661] debug_smp_processor_id+0xde/0xe0 > [72770.969674] ieee80211_xmit_fast_finish+0x5a/0x1e0 [mac80211] > [72770.969687] ieee80211_tx_dequeue+0x472/0xb50 [mac80211] > [72770.969695] iwl_mvm_mac_itxq_xmit+0x6f/0x100 [iwlmvm] > [72770.969721] _ieee80211_wake_txqs+0x218/0x450 [mac80211] > [72770.969733] ieee80211_wake_queues_by_reason+0x7a/0xd0 [mac80211] > [72770.969745] ieee80211_set_disassoc+0x48d/0x5d0 [mac80211] > [72770.969760] ieee80211_mgd_deauth.cold+0x4a/0x3f4 [mac80211] > [72770.969797] cfg80211_mlme_deauth+0xc1/0x220 [cfg80211] > [72770.969809] nl80211_deauthenticate+0xd8/0x120 [cfg80211] > [72770.969813] genl_family_rcv_msg+0x1f3/0x470 > [72770.969815] genl_rcv_msg+0x47/0x90 > [72770.969818] ? __kmalloc_node_track_caller+0x1b7/0x2d0 > [72770.969819] ? genl_family_rcv_msg+0x470/0x470 > [72770.969820] netlink_rcv_skb+0x75/0x140 > [72770.969822] genl_rcv+0x24/0x40 > [72770.969823] netlink_unicast+0x177/0x1f0 > [72770.969824] netlink_sendmsg+0x1fe/0x3c0 > [72770.969827] sock_sendmsg+0x4f/0x60 > [72770.969828] ___sys_sendmsg+0x304/0x370 > [72770.969831] ? unix_ioctl+0x99/0x190 > [72770.969834] __sys_sendmsg+0x81/0xd0 > [72770.969850] do_syscall_64+0x5f/0x1d0 > [72770.969851] ? prepare_exit_to_usermode+0x85/0xb0 > [72770.969853] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Hmm, ieee80211_set_disassoc() has a call to ieee80211_flush_queues(); but that only calls into the driver, it doesn't flush the TXQ. Maybe we need to add that? -Toke
