** Tags added: kernel-daily-bug -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1979571
Title: ath9k: ath9k_txq_has_key regularly produces soft lockups Status in linux package in Ubuntu: Confirmed Bug description: We first saw this bug using the Kernel 5.4.0-89 shipped provided by Ubuntu. 5.4.0-88 still works fine. I'm not a kernel expert but https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/net/wireless/ath/ath9k/main.c?id=ca2848022c12789685d3fab3227df02b863f9696 introduces this new function (and is new in Ubuntu's 5.4.0-89) which seems to hang here and it is untouched since then. In particular the while loop in ath9k_txq_has_key looks fishy to me. The bug is hard to reproduce under lab conditions but happens regularly on our mobile robots. We suspect that it's related to roaming. The log below is one of the first occurrences of this bug from October last year: Oct 21 09:51:53 toru-0071 kernel: watchdog: BUG: soft lockup - CPU#7 stuck for 22s! [wpa_supplicant:484] Oct 21 09:51:53 toru-0071 kernel: Modules linked in: can_raw can xsk_diag af_packet_diag netlink_diag tcp_diag udp_diag raw_diag inet_diag unix_diag nft_ct nf_tables_set ccm ath9k ath9k_common ath9k_hw ath inte> Oct 21 09:51:53 toru-0071 kernel: glue_helper igb e1000e drm ahci dca i2c_i801 i2c_algo_bit libahci video Oct 21 09:51:53 toru-0071 kernel: CPU: 7 PID: 484 Comm: wpa_supplicant Tainted: G OEL 5.4.0-89-generic #100-Ubuntu Oct 21 09:51:53 toru-0071 kernel: Hardware name: Default string Default string/SKYBAY, BIOS 5.12 03/28/2017 Oct 21 09:51:53 toru-0071 kernel: RIP: 0010:ath9k_txq_has_key+0x1b4/0x200 [ath9k] Oct 21 09:51:53 toru-0071 kernel: Code: 8d 84 10 22 01 00 00 48 c1 e0 04 49 8b 44 05 10 48 39 c6 74 26 0f b6 58 53 84 db 75 16 48 8b 48 20 48 85 c9 74 0d 0f b6 49 4b <41> 39 c9 0f 84 6e ff ff ff 48 8b 00 48 39 > Oct 21 09:51:53 toru-0071 kernel: RSP: 0018:ffffb1dec0693628 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 Oct 21 09:51:53 toru-0071 kernel: RAX: ffff96524e14ac98 RBX: 0000000000000000 RCX: 00000000000000ff Oct 21 09:51:53 toru-0071 kernel: RDX: 0000000000000001 RSI: ffff96524e7e3320 RDI: ffff96524e7e3310 Oct 21 09:51:53 toru-0071 kernel: RBP: ffffb1dec0693670 R08: ffff965241f15630 R09: 0000000000000004 Oct 21 09:51:53 toru-0071 kernel: R10: 0000000000000027 R11: 0000000000000000 R12: 0000000000000003 Oct 21 09:51:53 toru-0071 kernel: R13: ffff96524e7e1e80 R14: 000000000000014a R15: ffff96524e7e3300 Oct 21 09:51:53 toru-0071 kernel: FS: 00007f5be4a76140(0000) GS:ffff96525dbc0000(0000) knlGS:0000000000000000 Oct 21 09:51:53 toru-0071 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 21 09:51:53 toru-0071 kernel: CR2: 00007f814ca21028 CR3: 000000080ce6a006 CR4: 00000000003606e0 Oct 21 09:51:53 toru-0071 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Oct 21 09:51:53 toru-0071 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Oct 21 09:51:53 toru-0071 kernel: Call Trace: Oct 21 09:51:53 toru-0071 kernel: ath9k_set_key+0xf5/0x290 [ath9k] Oct 21 09:51:53 toru-0071 kernel: ieee80211_key_replace+0x370/0x870 [mac80211] Oct 21 09:51:53 toru-0071 kernel: ieee80211_free_sta_keys+0xb3/0xf0 [mac80211] Oct 21 09:51:53 toru-0071 kernel: __sta_info_destroy_part2+0x3a/0x190 [mac80211] Oct 21 09:51:53 toru-0071 kernel: __sta_info_flush+0x128/0x180 [mac80211] Oct 21 09:51:53 toru-0071 kernel: ieee80211_set_disassoc+0xc0/0x5f0 [mac80211] Oct 21 09:51:53 toru-0071 kernel: ieee80211_mgd_auth+0x15b/0x3d0 [mac80211] Oct 21 09:51:53 toru-0071 kernel: ieee80211_auth+0x18/0x20 [mac80211] Oct 21 09:51:53 toru-0071 kernel: cfg80211_mlme_auth+0x104/0x210 [cfg80211] Oct 21 09:51:53 toru-0071 kernel: nl80211_authenticate+0x284/0x2e0 [cfg80211] Oct 21 09:51:53 toru-0071 kernel: genl_family_rcv_msg+0x1b9/0x470 Oct 21 09:51:53 toru-0071 kernel: ? __netlink_sendskb+0x42/0x50 Oct 21 09:51:53 toru-0071 kernel: genl_rcv_msg+0x4c/0xa0 Oct 21 09:51:53 toru-0071 kernel: ? _cond_resched+0x19/0x30 Oct 21 09:51:53 toru-0071 kernel: ? genl_family_rcv_msg+0x470/0x470 Oct 21 09:51:53 toru-0071 kernel: netlink_rcv_skb+0x50/0x120 Oct 21 09:51:53 toru-0071 kernel: genl_rcv+0x29/0x40 Oct 21 09:51:53 toru-0071 kernel: netlink_unicast+0x187/0x220 Oct 21 09:51:53 toru-0071 kernel: netlink_sendmsg+0x222/0x3e0 Oct 21 09:51:53 toru-0071 kernel: sock_sendmsg+0x65/0x70 Oct 21 09:51:53 toru-0071 kernel: ____sys_sendmsg+0x212/0x280 Oct 21 09:51:53 toru-0071 kernel: ___sys_sendmsg+0x88/0xd0 Oct 21 09:51:53 toru-0071 kernel: ? sock_sendmsg+0x65/0x70 Oct 21 09:51:53 toru-0071 kernel: ? sock_write_iter+0x93/0xf0 Oct 21 09:51:53 toru-0071 kernel: ? new_sync_write+0x125/0x1c0 Oct 21 09:51:53 toru-0071 kernel: ? __cgroup_bpf_run_filter_setsockopt+0xae/0x2d0 Oct 21 09:51:53 toru-0071 kernel: ? _cond_resched+0x19/0x30 Oct 21 09:51:53 toru-0071 kernel: ? aa_sk_perm+0x43/0x170 Oct 21 09:51:53 toru-0071 kernel: __sys_sendmsg+0x5c/0xa0 Oct 21 09:51:53 toru-0071 kernel: __x64_sys_sendmsg+0x1f/0x30 Oct 21 09:51:53 toru-0071 kernel: do_syscall_64+0x57/0x190 Oct 21 09:51:53 toru-0071 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 Oct 21 09:51:53 toru-0071 kernel: RIP: 0033:0x7f5be4e06747 Oct 21 09:51:53 toru-0071 kernel: Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 > Oct 21 09:51:53 toru-0071 kernel: RSP: 002b:00007fff90564598 EFLAGS: 00000246 ORIG_RAX: 000000000000002e Oct 21 09:51:53 toru-0071 kernel: RAX: ffffffffffffffda RBX: 0000558020f4b440 RCX: 00007f5be4e06747 Oct 21 09:51:53 toru-0071 kernel: RDX: 0000000000000000 RSI: 00007fff905645d0 RDI: 0000000000000004 Oct 21 09:51:53 toru-0071 kernel: RBP: 0000558020f52830 R08: 0000000000000004 R09: 00007f5be4eceb80 Oct 21 09:51:53 toru-0071 kernel: R10: 00007fff905646a4 R11: 0000000000000246 R12: 0000558020f4b350 Oct 21 09:51:53 toru-0071 kernel: R13: 00007fff905645d0 R14: 00007fff905646a4 R15: 0000558020f53440 Description: Ubuntu 20.04.4 LTS Release: 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1979571/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
