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Message-ID: <552f5b91-d9ed-49cf-aaee-2cf5fe9fbbe8@straussaudio.ch>
Date: Sat, 30 Mar 2024 22:23:36 +0100
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Subject: Re: Bluetooth broken for some people with 6.8.2 [Was: [PATCH 6.8
 308/715] Bluetooth: hci_core: Cancel request on command timeout]
From: Philippe Strauss <philippe@straussaudio.ch>
To: Greg KH <gregkh@linuxfoundation.org>,
 Linux regressions mailing list <regressions@lists.linux.dev>
Cc: Sasha Levin <sashal@kernel.org>, linux-kernel@vger.kernel.org,
 stable@vger.kernel.org, Luiz Augusto von Dentz <luiz.von.dentz@intel.com>,
 Jakub Kicinski <kuba@kernel.org>
References: <20240324223455.1342824-1-sashal@kernel.org>
 <20240324223455.1342824-309-sashal@kernel.org>
 <bf267566-c18c-4ad9-9263-8642ecfdef1f@leemhuis.info>
 <2024033018-speller-supremacy-5436@gregkh>
 <f52daf9a-f934-4756-8a94-e7e383fbcb85@straussaudio.ch>
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Oh it's in the debugging code, my problem, I've reconfigured my kernel 
without debugging in iwlwifi and btusb/btintel and can now use 6.8.2 as 
my laptop kernel.

On 3/30/24 6:22 PM, Philippe Strauss wrote:
> I'm a good linux sysadmin with basics C abilities and no prior kernel 
> dev experience having subscribed to the lkml yesterday to report two 
> oopses which may be related:
>
> -- 
>
> 6.8.2
>
> Mar 30 17:27:26 PulseG2 NetworkManager[963]: <info> [1711816046.7303] 
> device (wlp3s0): state change: unmanaged -> unavailable (reason 
> 'managed', sys-iface-state: 'external')
> Mar 30 17:27:26 PulseG2 kernel: Bluetooth: hci0: command 0xfc05 tx 
> timeout
> Mar 30 17:27:26 PulseG2 kernel: Bluetooth: hci0: Reading Intel version 
> command failed (-110)
> Mar 30 17:27:27 PulseG2 kernel: iwlwifi 0000:03:00.0: Registered PHC 
> clock: iwlwifi-PTP, with index: 0
> Mar 30 17:27:27 PulseG2 kernel: BUG: kernel NULL pointer dereference, 
> address: 0000000000000027
> Mar 30 17:27:27 PulseG2 kernel: #PF: supervisor read access in kernel 
> mode
> Mar 30 17:27:27 PulseG2 kernel: #PF: error_code(0x0000) - not-present 
> page
> Mar 30 17:27:27 PulseG2 kernel: PGD 0 P4D 0
> Mar 30 17:27:27 PulseG2 kernel: Oops: 0000 [#1] PREEMPT SMP PTI
> Mar 30 17:27:27 PulseG2 kernel: CPU: 15 PID: 963 Comm: NetworkManager 
> Not tainted 6.8.2 #1
> Mar 30 17:27:27 PulseG2 kernel: Hardware name: TUXEDO TUXEDO Pulse 15 
> Gen2/PF5LUXG, BIOS N.1.06A12 03/15/2023
> Mar 30 17:27:27 PulseG2 kernel: RIP: 
> 0010:iwl_mvm_vif_dbgfs_add_link+0x88/0xd0 [iwlmvm]
> Mar 30 17:27:27 PulseG2 kernel: Code: f3 48 ab 4d 85 f6 74 35 48 89 f3 
> 4c 89 f1 48 c7 c2 26 34 31 c2 4c 89 ef be 64 00 00 00 e8 70 83 1d ef 
> 49 8b b4 24 c8 1c 00 00 <49> 8b 7e 28 4c 89 ea e8 fc 61 8c ee 48 89 83 >
> Mar 30 17:27:27 PulseG2 kernel: RSP: 0018:ffffad53c7557510 EFLAGS: 
> 00010246
> Mar 30 17:27:27 PulseG2 kernel: RAX: 0000000000000018 RBX: 
> ffff930126395b98 RCX: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: RDX: 0000000000000000 RSI: 
> ffffffffffffffff RDI: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: RBP: ffffad53c75575a0 R08: 
> 0000000000000000 R09: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: R10: 0000000000000000 R11: 
> 0000000000000000 R12: ffff92feb9291fc8
> Mar 30 17:27:27 PulseG2 kernel: R13: ffffad53c7557514 R14: 
> ffffffffffffffff R15: ffff930126395b98
> Mar 30 17:27:27 PulseG2 kernel: FS:  00007d4436d44500(0000) 
> GS:ffff9301ee980000(0000) knlGS:0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
> 0000000080050033
> Mar 30 17:27:27 PulseG2 kernel: CR2: 0000000000000027 CR3: 
> 0000000105df2000 CR4: 0000000000350ef0
> Mar 30 17:27:27 PulseG2 kernel: Call Trace:
> Mar 30 17:27:27 PulseG2 kernel:  <TASK>
> Mar 30 17:27:27 PulseG2 kernel:  ? show_regs+0x71/0x90
> Mar 30 17:27:27 PulseG2 kernel:  ? __die+0x28/0x80
> Mar 30 17:27:27 PulseG2 kernel:  ? page_fault_oops+0x176/0x500
> Mar 30 17:27:27 PulseG2 kernel:  ? dentry_name+0x180/0x370
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? iwl_trans_txq_send_hcmd+0x389/0x460 
> [iwlwifi]
> Mar 30 17:27:27 PulseG2 kernel:  ? do_user_addr_fault+0x2f2/0x6c0
> Mar 30 17:27:27 PulseG2 kernel:  ? exc_page_fault+0x87/0x1b0
> Mar 30 17:27:27 PulseG2 kernel:  ? asm_exc_page_fault+0x2b/0x30
> Mar 30 17:27:27 PulseG2 kernel:  ? 
> iwl_mvm_vif_dbgfs_add_link+0x88/0xd0 [iwlmvm]
> Mar 30 17:27:27 PulseG2 kernel: 
> iwl_mvm_mld_mac_add_interface+0x2f1/0x3b0 [iwlmvm]
> Mar 30 17:27:27 PulseG2 kernel:  drv_add_interface+0x58/0x280 [mac80211]
> Mar 30 17:27:27 PulseG2 kernel:  ieee80211_do_open+0x515/0x7d0 [mac80211]
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ieee80211_open+0x6d/0xa0 [mac80211]
> Mar 30 17:27:27 PulseG2 kernel:  __dev_open+0xfa/0x1b0
> Mar 30 17:27:27 PulseG2 kernel:  __dev_change_flags+0x1ec/0x270
> Mar 30 17:27:27 PulseG2 kernel:  dev_change_flags+0x2b/0x80
> Mar 30 17:27:27 PulseG2 kernel:  do_setlink+0x3a8/0x12c0
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? __nla_validate_parse+0x5b/0xe40
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? get_partial_node.part.0+0x19d/0x2e0
> Mar 30 17:27:27 PulseG2 kernel:  __rtnl_newlink+0x717/0xb60
> Mar 30 17:27:27 PulseG2 kernel:  ? rtnl_newlink+0x62/0xb0
> Mar 30 17:27:27 PulseG2 kernel:  rtnl_newlink+0x7b/0xb0
> Mar 30 17:27:27 PulseG2 kernel:  rtnetlink_rcv_msg+0x174/0x430
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? kmem_cache_alloc_lru+0x372/0x420
> Mar 30 17:27:27 PulseG2 kernel:  ? __alloc_skb+0x178/0x1c0
> Mar 30 17:27:27 PulseG2 kernel:  ? __alloc_skb+0x178/0x1c0
> Mar 30 17:27:27 PulseG2 kernel:  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
> Mar 30 17:27:27 PulseG2 kernel:  netlink_rcv_skb+0x61/0x110
> Mar 30 17:27:27 PulseG2 kernel:  rtnetlink_rcv+0x19/0x30
> Mar 30 17:27:27 PulseG2 kernel:  netlink_unicast+0x248/0x380
> Mar 30 17:27:27 PulseG2 kernel:  netlink_sendmsg+0x218/0x470
> Mar 30 17:27:27 PulseG2 kernel:  __sock_sendmsg+0xae/0xb0
> Mar 30 17:27:27 PulseG2 kernel:  ____sys_sendmsg+0x25f/0x300
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? copy_msghdr_from_user+0x80/0xd0
> Mar 30 17:27:27 PulseG2 kernel:  ___sys_sendmsg+0x96/0xe0
> Mar 30 17:27:27 PulseG2 kernel:  __sys_sendmsg+0x81/0xe0
> Mar 30 17:27:27 PulseG2 kernel:  __x64_sys_sendmsg+0x21/0x30
> Mar 30 17:27:27 PulseG2 kernel:  do_syscall_64+0x7b/0x140
> Mar 30 17:27:27 PulseG2 kernel:  ? do_syscall_64+0x87/0x140
> Mar 30 17:27:27 PulseG2 kernel:  ? srso_return_thunk+0x5/0x5f
> Mar 30 17:27:27 PulseG2 kernel:  ? do_syscall_64+0x87/0x140
> Mar 30 17:27:27 PulseG2 kernel: entry_SYSCALL_64_after_hwframe+0x6e/0x76
> Mar 30 17:27:27 PulseG2 kernel: RIP: 0033:0x7d4437a9fb9d
> Mar 30 17:27:27 PulseG2 kernel: Code: 28 89 54 24 1c 48 89 74 24 10 89 
> 7c 24 08 e8 4a 9f f7 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 8b 7c 24 
> 08 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 33 44 89 c7 48 89 44 24 >
> Mar 30 17:27:27 PulseG2 kernel: RSP: 002b:00007ffcc6e0d7a0 EFLAGS: 
> 00000293 ORIG_RAX: 000000000000002e
> Mar 30 17:27:27 PulseG2 kernel: RAX: ffffffffffffffda RBX: 
> 0000634f86cfcca0 RCX: 00007d4437a9fb9d
> Mar 30 17:27:27 PulseG2 kernel: RDX: 0000000000000000 RSI: 
> 00007ffcc6e0d7f0 RDI: 000000000000000d
> Mar 30 17:27:27 PulseG2 kernel: RBP: 00007ffcc6e0d7f0 R08: 
> 0000000000000000 R09: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: R10: 0000000000000000 R11: 
> 0000000000000293 R12: 000000000000000e
> Mar 30 17:27:27 PulseG2 kernel: R13: 0000634f86d69590 R14: 
> 0000000000000000 R15: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel:  </TASK>
> Mar 30 17:27:27 PulseG2 kernel: Modules linked in: qrtr bnep 
> intel_rapl_msr intel_rapl_common joydev nls_iso8859_1 edac_mce_amd 
> nls_cp437 iwlmvm snd_hda_codec_realtek vfat snd_hda_codec_generic fat 
> snd_hda_codec>
> Mar 30 17:27:27 PulseG2 kernel:  i2c_piix4 realtek drm wmi aesni_intel 
> crypto_simd cryptd
> Mar 30 17:27:27 PulseG2 kernel: CR2: 0000000000000027
> Mar 30 17:27:27 PulseG2 kernel: ---[ end trace 0000000000000000 ]---
> Mar 30 17:27:27 PulseG2 kernel: RIP: 
> 0010:iwl_mvm_vif_dbgfs_add_link+0x88/0xd0 [iwlmvm]
> Mar 30 17:27:27 PulseG2 kernel: Code: f3 48 ab 4d 85 f6 74 35 48 89 f3 
> 4c 89 f1 48 c7 c2 26 34 31 c2 4c 89 ef be 64 00 00 00 e8 70 83 1d ef 
> 49 8b b4 24 c8 1c 00 00 <49> 8b 7e 28 4c 89 ea e8 fc 61 8c ee 48 89 83 >
> Mar 30 17:27:27 PulseG2 kernel: RSP: 0018:ffffad53c7557510 EFLAGS: 
> 00010246
> Mar 30 17:27:27 PulseG2 kernel: RAX: 0000000000000018 RBX: 
> ffff930126395b98 RCX: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: RDX: 0000000000000000 RSI: 
> ffffffffffffffff RDI: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: RBP: ffffad53c75575a0 R08: 
> 0000000000000000 R09: 0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: R10: 0000000000000000 R11: 
> 0000000000000000 R12: ffff92feb9291fc8
> Mar 30 17:27:27 PulseG2 kernel: R13: ffffad53c7557514 R14: 
> ffffffffffffffff R15: ffff930126395b98
> Mar 30 17:27:27 PulseG2 kernel: FS:  00007d4436d44500(0000) 
> GS:ffff9301ee980000(0000) knlGS:0000000000000000
> Mar 30 17:27:27 PulseG2 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
> 0000000080050033
> Mar 30 17:27:27 PulseG2 kernel: CR2: 0000000000000027 CR3: 
> 0000000105df2000 CR4: 0000000000350ef0
> Mar 30 17:27:27 PulseG2 kernel: note: NetworkManager[963] exited with 
> irqs disabled
>
> -- 
>
> 6.6.22
>                                 Bluetooth: hci0: Found device 
> firmware: intel/ibt-20-1-3.sfi
> ..
> Mar 29 17:04:59 PulseG2 kernel: Bluetooth: hci0: FW download error 
> recovery failed (-19)
> Mar 29 17:04:59 PulseG2 kernel: Bluetooth: hci0: sending frame failed 
> (-19)
> Mar 29 17:04:59 PulseG2 kernel: BUG: kernel NULL pointer dereference, 
> address: 0000000000000068
> Mar 29 17:04:59 PulseG2 kernel: #PF: supervisor read access in kernel 
> mode
> Mar 29 17:04:59 PulseG2 kernel: #PF: error_code(0x0000) - not-present 
> page
> Mar 29 17:04:59 PulseG2 kernel: PGD 0 P4D 0
> Mar 29 17:04:59 PulseG2 kernel: Oops: 0000 [#1] PREEMPT SMP PTI
> Mar 29 17:04:59 PulseG2 kernel: CPU: 0 PID: 160 Comm: kworker/u35:0 
> Not tainted 6.6.23 #5
> Mar 29 17:04:59 PulseG2 kernel: Hardware name: TUXEDO TUXEDO Pulse 15 
> Gen2/PF5LUXG, BIOS N.1.06A12 03/15/2023
> Mar 29 17:04:59 PulseG2 kernel: Workqueue: hci0 hci_power_on [bluetooth]
> Mar 29 17:04:59 PulseG2 kernel: RIP: 
> 0010:btintel_read_debug_features+0x4f/0x100 [btintel]
> Mar 29 17:04:59 PulseG2 kernel: Code: 00 00 53 48 83 ec 10 65 48 8b 04 
> 25 28 00 00 00 48 89 45 e0 31 c0 c6 45 df 01 e8 8c cb b4 ff 48 89 c3 
> 48 3d 00 f0 ff ff 77 56 <83> 78 68 13 75 73 48 8b 80 c0 00 00 00 be 02 >
> Mar 29 17:04:59 PulseG2 kernel: RSP: 0018:ffffc900016a7c78 EFLAGS: 
> 00010207
> Mar 29 17:04:59 PulseG2 kernel: RAX: 0000000000000000 RBX: 
> 0000000000000000 RCX: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: RDX: 0000000000000000 RSI: 
> 0000000000000000 RDI: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: RBP: ffffc900016a7ca0 R08: 
> 0000000000000000 R09: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: R10: 0000000000000000 R11: 
> 0000000000000000 R12: ffffc900016a7cb0
> Mar 29 17:04:59 PulseG2 kernel: R13: ffff88820e73c000 R14: 
> ffff888122cf8400 R15: ffff88820e73c6d0
> Mar 29 17:04:59 PulseG2 kernel: FS:  0000000000000000(0000) 
> GS:ffff8887ee200000(0000) knlGS:0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
> 0000000080050033
> Mar 29 17:04:59 PulseG2 kernel: CR2: 0000000000000068 CR3: 
> 0000000780c24000 CR4: 0000000000350ef0
> Mar 29 17:04:59 PulseG2 kernel: Call Trace:
> Mar 29 17:04:59 PulseG2 kernel:  <TASK>
> Mar 29 17:04:59 PulseG2 kernel:  ? show_regs+0x71/0x90
> Mar 29 17:04:59 PulseG2 kernel:  ? __die+0x28/0x80
> Mar 29 17:04:59 PulseG2 kernel:  ? page_fault_oops+0x176/0x500
> Mar 29 17:04:59 PulseG2 kernel:  ? do_user_addr_fault+0x2fb/0x6a0
> Mar 29 17:04:59 PulseG2 kernel:  ? exc_page_fault+0x87/0x1b0
> Mar 29 17:04:59 PulseG2 kernel:  ? asm_exc_page_fault+0x2b/0x30
> Mar 29 17:04:59 PulseG2 kernel:  ? 
> btintel_read_debug_features+0x4f/0x100 [btintel]
> Mar 29 17:04:59 PulseG2 kernel:  ? 
> btintel_read_debug_features+0x44/0x100 [btintel]
> Mar 29 17:04:59 PulseG2 kernel: 
> btintel_register_devcoredump_support.isra.0+0x3e/0xd0 [btintel]
> Mar 29 17:04:59 PulseG2 kernel: btintel_setup_combined+0x2b3/0x780 
> [btintel]
> Mar 29 17:04:59 PulseG2 kernel:  hci_dev_open_sync+0x10b/0xcb0 
> [bluetooth]
> Mar 29 17:04:59 PulseG2 kernel:  ? srso_return_thunk+0x5/0x10
> Mar 29 17:04:59 PulseG2 kernel:  ? try_to_wake_up+0x2e2/0x6f0
> Mar 29 17:04:59 PulseG2 kernel:  hci_dev_do_open+0x28/0x70 [bluetooth]
> Mar 29 17:04:59 PulseG2 kernel:  hci_power_on+0x54/0x220 [bluetooth]
> Mar 29 17:04:59 PulseG2 kernel:  process_one_work+0x182/0x370
> Mar 29 17:04:59 PulseG2 kernel:  worker_thread+0x299/0x3e0
> Mar 29 17:04:59 PulseG2 kernel:  ? __pfx_worker_thread+0x10/0x10
> Mar 29 17:04:59 PulseG2 kernel:  kthread+0xf6/0x130
> Mar 29 17:04:59 PulseG2 kernel:  ? __pfx_kthread+0x10/0x10
> Mar 29 17:04:59 PulseG2 kernel:  ret_from_fork+0x4b/0x70
> Mar 29 17:04:59 PulseG2 kernel:  ? __pfx_kthread+0x10/0x10
> Mar 29 17:04:59 PulseG2 kernel:  ret_from_fork_asm+0x1b/0x30
> Mar 29 17:04:59 PulseG2 kernel:  </TASK>
> Mar 29 17:04:59 PulseG2 kernel: Modules linked in: 
> snd_hda_codec_generic uvcvideo(+) amd64_edac(-) nls_iso8859_1 
> edac_mce_amd ledtrig_audio btusb uvc snd_hda_codec_hdmi mac80211 
> nls_cp437 videobuf2_vmalloc btrtl>
> Mar 29 17:04:59 PulseG2 kernel:  drm wmi
> Mar 29 17:04:59 PulseG2 kernel: CR2: 0000000000000068
> Mar 29 17:04:59 PulseG2 kernel: ---[ end trace 0000000000000000 ]---
> Mar 29 17:04:59 PulseG2 kernel: RIP: 
> 0010:btintel_read_debug_features+0x4f/0x100 [btintel]
> Mar 29 17:04:59 PulseG2 kernel: Code: 00 00 53 48 83 ec 10 65 48 8b 04 
> 25 28 00 00 00 48 89 45 e0 31 c0 c6 45 df 01 e8 8c cb b4 ff 48 89 c3 
> 48 3d 00 f0 ff ff 77 56 <83> 78 68 13 75 73 48 8b 80 c0 00 00 00 be 02 >
> Mar 29 17:04:59 PulseG2 kernel: RSP: 0018:ffffc900016a7c78 EFLAGS: 
> 00010207
> Mar 29 17:04:59 PulseG2 kernel: RAX: 0000000000000000 RBX: 
> 0000000000000000 RCX: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: RDX: 0000000000000000 RSI: 
> 0000000000000000 RDI: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: RBP: ffffc900016a7ca0 R08: 
> 0000000000000000 R09: 0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: R10: 0000000000000000 R11: 
> 0000000000000000 R12: ffffc900016a7cb0
> Mar 29 17:04:59 PulseG2 kernel: R13: ffff88820e73c000 R14: 
> ffff888122cf8400 R15: ffff88820e73c6d0
> Mar 29 17:04:59 PulseG2 kernel: FS:  0000000000000000(0000) 
> GS:ffff8887ee200000(0000) knlGS:0000000000000000
> Mar 29 17:04:59 PulseG2 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
> 0000000080050033
> Mar 29 17:04:59 PulseG2 kernel: CR2: 0000000000000068 CR3: 
> 0000000780c24000 CR4: 0000000000350ef0
> Mar 29 17:04:59 PulseG2 kernel: note: kworker/u35:0[160] exited with 
> irqs disabled
> ..
> (reboot in between)
> Mar 29 21:17:26 PulseG2 kernel: Bluetooth: hci0: Reading Intel version 
> command failed (-110)
> Mar 29 21:17:26 PulseG2 kernel: Bluetooth: hci0: command 0xfc05 tx 
> timeout
>
> (.pylocal) catseye@PulseG2:~$ lspci
>
> 00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne 
> Root Complex
> 00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne IOMMU
> 00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir PCIe 
> Dummy Host Bridge
> 00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne 
> PCIe GPP Bridge
> 00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir PCIe 
> Dummy Host Bridge
> 00:02.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne 
> PCIe GPP Bridge
> 00:02.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne 
> PCIe GPP Bridge
> 00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne 
> PCIe GPP Bridge
> 00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir PCIe 
> Dummy Host Bridge
> 00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Renoir Internal 
> PCIe GPP Bridge to Bus
> 00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller 
> (rev 51)
> 00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge 
> (rev 51)
> 00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 0
> 00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 1
> 00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 2
> 00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 3
> 00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 4
> 00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 5
> 00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 6
> 00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Renoir Device 
> 24: Function 7
> 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
> RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller (rev 15)
> 02:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd 
> NVMe SSD Controller 980 (DRAM-less)
> 03:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)
> 05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. 
> [AMD/ATI] Lucienne (rev c1)
> 05:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Renoir 
> Radeon High Definition Audio Controller
> 05:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] 
> Family 17h (Models 10h-1fh) Platform Security Processor
> 05:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] 
> Renoir/Cezanne USB 3.1
> 05:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] 
> Renoir/Cezanne USB 3.1
> 05:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] 
> ACP/ACP3X/ACP6x Audio Coprocessor (rev 01)
> 05:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 
> 17h/19h HD Audio Controller
> (.pylocal) catseye@PulseG2:~$ lsusb
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 002: ID 04f2:b71a Chicony Electronics Co., Ltd 
> Integrated IR Camera
> Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. Hub
> Bus 001 Device 004: ID 046d:c077 Logitech, Inc. Mouse
> Bus 001 Device 005: ID 8087:0029 Intel Corp. AX200 Bluetooth
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>
> Not a single oops up to 6.6.20 (included), haven't tried 6.6.21, and 
> started with 6.6.22, while 6.6.23 seems stable for now, 6.7.11 also 
> trigger oops around BT.
>
> The configuration is my own, derived from debian, but heavily modified 
> (trimmed down) and hardened using KSPP recommendations.
>
> I have spare time, let me know if I can be of any testing help.
>
> Regards.
>
> Philippe, Lausanne, switzerland.
>
>
> On 3/30/24 5:23 PM, Greg KH wrote:
>> On Sat, Mar 30, 2024 at 03:59:22PM +0100, Linux regression tracking 
>> (Thorsten Leemhuis) wrote:
>>> On 24.03.24 23:28, Sasha Levin wrote:
>>>> From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
>>>>
>>>> [ Upstream commit 63298d6e752fc0ec7f5093860af8bc9f047b30c8 ]
>>>>
>>>> If command has timed out call __hci_cmd_sync_cancel to notify the
>>>> hci_req since it will inevitably cause a timeout.
>>>>
>>>> This also rework the code around __hci_cmd_sync_cancel since it was
>>>> wrongly assuming it needs to cancel timer as well, but sometimes the
>>>> timers have not been started or in fact they already had timed out in
>>>> which case they don't need to be cancel yet again.
>>>>
>>>> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
>>>> Stable-dep-of: 2615fd9a7c25 ("Bluetooth: hci_sync: Fix overwriting 
>>>> request callback")
>>>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>>> Hey stable team, I wonder if it might be wise to pick up 1c3366abdbe884
>>> ("Bluetooth: hci_sync: Fix not checking error on
>>> hci_cmd_sync_cancel_sync") from next
>>> (https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=1c3366abdbe884) 
>>>
>>> for the next releases of all series that a few days ago received
>>> 63298d6e752fc0 ("Bluetooth: hci_core: Cancel request on command 
>>> timeout").
>>>
>>> The latter patch sadly on quite a few systems causes a Oops due to a
>>> NULL pointer dereference and breaks Bluetooth. This was reported for
>>> mainline here (yes, coincidentally it was reported by yours truly):
>>> https://lore.kernel.org/all/08275279-7462-4f4a-a0ee-8aa015f829bc@leemhuis.info/ 
>>>
>>>
>>> Now that the patch landed in 6.8.2 it seems to happen there as well
>>> (guess in 6.7 and others, too), as can be seen from this bug report
>>> where multiple people already joined:
>>> https://bugzilla.kernel.org/show_bug.cgi?id=218651
>>>
>>> The fix mentioned above is on the way to Linus, but due to unlucky
>>> timing missed this weeks network pull, hence will likely only reach
>>> mainline next Thursday. But the fix afaics has a stable commit id, so
>>> might be worth picking up soon for the stable releases to fix the
>>> regression quickly.
>> Now queued up, thanks for letting us know.
>>
>> greg k-h
>>
>