2021-02-10 00:48:01

by Shuah Khan

[permalink] [raw]
Subject: [PATCH 1/5] ath10k: fix conf_mutex lock assert in ath10k_debug_fw_stats_request()

ath10k_debug_fw_stats_request() is called ath10k_sta_statistics()
without holding conf_mutex. ath10k_debug_fw_stats_request() simply
returns when CONFIG_ATH10K_DEBUGFS is disabled.

When CONFIG_ATH10K_DEBUGFS is enabled, ath10k_debug_fw_stats_request()
code path isn't protected. This assert is triggered when CONFIG_LOCKDEP
and CONFIG_ATH10K_DEBUGFS are enabled.

All other ath10k_debug_fw_stats_request() callers hold conf_mutex.
Fix ath10k_sta_statistics() to do the same.

WARNING: CPU: 5 PID: 696 at drivers/net/wireless/ath/ath10k/debug.c:357 ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
Modules linked in: rfcomm ccm fuse cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm amdgpu snd_seq_midi snd_seq_midi_event snd_rawmidi edac_mce_amd snd_seq ath10k_pci ath10k_core aesni_intel gpu_sched drm_ttm_helper btusb ttm glue_helper crypto_simd btrtl ath cryptd drm_kms_helper snd_seq_device btbcm snd_timer rapl btintel cec i2c_algo_bit mac80211 bluetooth fb_sys_fops input_leds ecdh_generic snd wmi_bmof syscopyarea ecc serio_raw efi_pstore ccp k10temp sysfillrect soundcore sysimgblt snd_pci_acp3x cfg80211 ipmi_devintf libarc4 ipmi_msghandler mac_hid sch_fq_codel parport_pc ppdev lp parport drm ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul psmouse ahci nvme libahci i2c_piix4 nvme_core r8169 realtek wmi video
CPU: 5 PID: 696 Comm: NetworkManager Tainted: G W 5.11.0-rc7+ #20
Hardware name: LENOVO 10VGCTO1WW/3130, BIOS M1XKT45A 08/21/2019
RIP: 0010:ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
Code: 83 c4 10 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8d bf e8 20 00 00 be ff ff ff ff e8 de 2d 47 fa 85 c0 0f 85 8d fd ff ff <0f> 0b e9 86 fd ff ff 41 bf a1 ff ff ff 44 89 fa 48 c7 c6 2c 71 c4
RSP: 0018:ffffaffbc124b7d0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff93d02e4fec70 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff93d00cba5248 RDI: ffff93d00ab309a0
RBP: ffffaffbc124b808 R08: 0000000000000000 R09: ffff93d02e4fec70
R10: 0000000000000001 R11: 0000000000000246 R12: ffff93d00cba3160
R13: ffff93d00cba3160 R14: ffff93d02e4fe4f0 R15: 0000000000000001
FS: 00007f7ce8d50bc0(0000) GS:ffff93d137d40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3595ad160 CR3: 000000010d492000 CR4: 00000000003506e0
Call Trace:
? sta_info_get_bss+0xeb/0x1f0 [mac80211]
ath10k_sta_statistics+0x4f/0x280 [ath10k_core]
sta_set_sinfo+0xda/0xd20 [mac80211]
ieee80211_get_station+0x58/0x80 [mac80211]
nl80211_get_station+0xbd/0x340 [cfg80211]
genl_family_rcv_msg_doit+0xe7/0x150
genl_rcv_msg+0xe2/0x1e0
? nl80211_dump_station+0x3a0/0x3a0 [cfg80211]
? nl80211_send_station+0xef0/0xef0 [cfg80211]
? genl_get_cmd+0xd0/0xd0
netlink_rcv_skb+0x55/0x100
genl_rcv+0x29/0x40
netlink_unicast+0x1a8/0x270
netlink_sendmsg+0x253/0x480
sock_sendmsg+0x65/0x70
____sys_sendmsg+0x219/0x260
? __import_iovec+0x32/0x170
___sys_sendmsg+0xb7/0x100
? end_opal_session+0x39/0xd0
? __fget_files+0xe0/0x1d0
? find_held_lock+0x31/0x90
? __fget_files+0xe0/0x1d0
? __fget_files+0x103/0x1d0
? __fget_light+0x32/0x80
__sys_sendmsg+0x5a/0xa0
? syscall_enter_from_user_mode+0x21/0x60
__x64_sys_sendmsg+0x1f/0x30
do_syscall_64+0x38/0x50
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f7cea2c791d
Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 4a ee ff 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 08 e8 9e ee ff ff 48
RSP: 002b:00007ffedf612a30 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00005618c4cfec00 RCX: 00007f7cea2c791d
RDX: 0000000000000000 RSI: 00007ffedf612a80 RDI: 000000000000000b
RBP: 00007ffedf612a80 R08: 0000000000000000 R09: 00005618c4e74000
R10: 00005618c4da0590 R11: 0000000000000293 R12: 00005618c4cfec00
R13: 00005618c4cfe2c0 R14: 00007f7cea32ef80 R15: 00005618c4cff340
irq event stamp: 520897
hardirqs last enabled at (520903): [<ffffffffba501cc5>] console_unlock+0x4e5/0x5d0
hardirqs last disabled at (520908): [<ffffffffba501c38>] console_unlock+0x458/0x5d0
softirqs last enabled at (520722): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20
softirqs last disabled at (520717): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20

Signed-off-by: Shuah Khan <[email protected]>
---
drivers/net/wireless/ath/ath10k/mac.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 7d98250380ec..e815aab412d7 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -9117,7 +9117,9 @@ static void ath10k_sta_statistics(struct ieee80211_hw *hw,
if (!ath10k_peer_stats_enabled(ar))
return;

+ mutex_lock(&ar->conf_mutex);
ath10k_debug_fw_stats_request(ar);
+ mutex_unlock(&ar->conf_mutex);

sinfo->rx_duration = arsta->rx_duration;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
--
2.27.0


2021-02-10 08:43:59

by Kalle Valo

[permalink] [raw]
Subject: Re: [PATCH 1/5] ath10k: fix conf_mutex lock assert in ath10k_debug_fw_stats_request()

Shuah Khan <[email protected]> wrote:

> ath10k_debug_fw_stats_request() is called ath10k_sta_statistics()
> without holding conf_mutex. ath10k_debug_fw_stats_request() simply
> returns when CONFIG_ATH10K_DEBUGFS is disabled.
>
> When CONFIG_ATH10K_DEBUGFS is enabled, ath10k_debug_fw_stats_request()
> code path isn't protected. This assert is triggered when CONFIG_LOCKDEP
> and CONFIG_ATH10K_DEBUGFS are enabled.
>
> All other ath10k_debug_fw_stats_request() callers hold conf_mutex.
> Fix ath10k_sta_statistics() to do the same.
>
> WARNING: CPU: 5 PID: 696 at drivers/net/wireless/ath/ath10k/debug.c:357 ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
> Modules linked in: rfcomm ccm fuse cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm amdgpu snd_seq_midi snd_seq_midi_event snd_rawmidi edac_mce_amd snd_seq ath10k_pci ath10k_core aesni_intel gpu_sched drm_ttm_helper btusb ttm glue_helper crypto_simd btrtl ath cryptd drm_kms_helper snd_seq_device btbcm snd_timer rapl btintel cec i2c_algo_bit mac80211 bluetooth fb_sys_fops input_leds ecdh_generic snd wmi_bmof syscopyarea ecc serio_raw efi_pstore ccp k10temp sysfillrect soundcore sysimgblt snd_pci_acp3x cfg80211 ipmi_devintf libarc4 ipmi_msghandler mac_hid sch_fq_codel parport_pc ppdev lp parport drm ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul psmouse ahci nvme libahci i2c_piix4 nvme_core r8169 realtek wmi video
> CPU: 5 PID: 696 Comm: NetworkManager Tainted: G W 5.11.0-rc7+ #20
> Hardware name: LENOVO 10VGCTO1WW/3130, BIOS M1XKT45A 08/21/2019
> RIP: 0010:ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
> Code: 83 c4 10 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8d bf e8 20 00 00 be ff ff ff ff e8 de 2d 47 fa 85 c0 0f 85 8d fd ff ff <0f> 0b e9 86 fd ff ff 41 bf a1 ff ff ff 44 89 fa 48 c7 c6 2c 71 c4
> RSP: 0018:ffffaffbc124b7d0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff93d02e4fec70 RCX: 0000000000000001
> RDX: 0000000000000000 RSI: ffff93d00cba5248 RDI: ffff93d00ab309a0
> RBP: ffffaffbc124b808 R08: 0000000000000000 R09: ffff93d02e4fec70
> R10: 0000000000000001 R11: 0000000000000246 R12: ffff93d00cba3160
> R13: ffff93d00cba3160 R14: ffff93d02e4fe4f0 R15: 0000000000000001
> FS: 00007f7ce8d50bc0(0000) GS:ffff93d137d40000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fc3595ad160 CR3: 000000010d492000 CR4: 00000000003506e0
> Call Trace:
> ? sta_info_get_bss+0xeb/0x1f0 [mac80211]
> ath10k_sta_statistics+0x4f/0x280 [ath10k_core]
> sta_set_sinfo+0xda/0xd20 [mac80211]
> ieee80211_get_station+0x58/0x80 [mac80211]
> nl80211_get_station+0xbd/0x340 [cfg80211]
> genl_family_rcv_msg_doit+0xe7/0x150
> genl_rcv_msg+0xe2/0x1e0
> ? nl80211_dump_station+0x3a0/0x3a0 [cfg80211]
> ? nl80211_send_station+0xef0/0xef0 [cfg80211]
> ? genl_get_cmd+0xd0/0xd0
> netlink_rcv_skb+0x55/0x100
> genl_rcv+0x29/0x40
> netlink_unicast+0x1a8/0x270
> netlink_sendmsg+0x253/0x480
> sock_sendmsg+0x65/0x70
> ____sys_sendmsg+0x219/0x260
> ? __import_iovec+0x32/0x170
> ___sys_sendmsg+0xb7/0x100
> ? end_opal_session+0x39/0xd0
> ? __fget_files+0xe0/0x1d0
> ? find_held_lock+0x31/0x90
> ? __fget_files+0xe0/0x1d0
> ? __fget_files+0x103/0x1d0
> ? __fget_light+0x32/0x80
> __sys_sendmsg+0x5a/0xa0
> ? syscall_enter_from_user_mode+0x21/0x60
> __x64_sys_sendmsg+0x1f/0x30
> do_syscall_64+0x38/0x50
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
> RIP: 0033:0x7f7cea2c791d
> Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 4a ee ff 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 08 e8 9e ee ff ff 48
> RSP: 002b:00007ffedf612a30 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 00005618c4cfec00 RCX: 00007f7cea2c791d
> RDX: 0000000000000000 RSI: 00007ffedf612a80 RDI: 000000000000000b
> RBP: 00007ffedf612a80 R08: 0000000000000000 R09: 00005618c4e74000
> R10: 00005618c4da0590 R11: 0000000000000293 R12: 00005618c4cfec00
> R13: 00005618c4cfe2c0 R14: 00007f7cea32ef80 R15: 00005618c4cff340
> irq event stamp: 520897
> hardirqs last enabled at (520903): [<ffffffffba501cc5>] console_unlock+0x4e5/0x5d0
> hardirqs last disabled at (520908): [<ffffffffba501c38>] console_unlock+0x458/0x5d0
> softirqs last enabled at (520722): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20
> softirqs last disabled at (520717): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20
>
> Signed-off-by: Shuah Khan <[email protected]>

Bad timing, just yesterday I applied an identical patch:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=ath-next&id=7df28718928d08034b36168200d67b558ce36f3d

Patch set to Superseded.

--
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]nuxfoundation.org/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

2021-02-10 16:22:53

by Shuah Khan

[permalink] [raw]
Subject: Re: [PATCH 1/5] ath10k: fix conf_mutex lock assert in ath10k_debug_fw_stats_request()

On 2/10/21 1:09 AM, Kalle Valo wrote:
> Shuah Khan <[email protected]> wrote:
>
>> ath10k_debug_fw_stats_request() is called ath10k_sta_statistics()
>> without holding conf_mutex. ath10k_debug_fw_stats_request() simply
>> returns when CONFIG_ATH10K_DEBUGFS is disabled.
>>
>> When CONFIG_ATH10K_DEBUGFS is enabled, ath10k_debug_fw_stats_request()
>> code path isn't protected. This assert is triggered when CONFIG_LOCKDEP
>> and CONFIG_ATH10K_DEBUGFS are enabled.
>>
>> All other ath10k_debug_fw_stats_request() callers hold conf_mutex.
>> Fix ath10k_sta_statistics() to do the same.
>>
>> WARNING: CPU: 5 PID: 696 at drivers/net/wireless/ath/ath10k/debug.c:357 ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
>> Modules linked in: rfcomm ccm fuse cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm amdgpu snd_seq_midi snd_seq_midi_event snd_rawmidi edac_mce_amd snd_seq ath10k_pci ath10k_core aesni_intel gpu_sched drm_ttm_helper btusb ttm glue_helper crypto_simd btrtl ath cryptd drm_kms_helper snd_seq_device btbcm snd_timer rapl btintel cec i2c_algo_bit mac80211 bluetooth fb_sys_fops input_leds ecdh_generic snd wmi_bmof syscopyarea ecc serio_raw efi_pstore ccp k10temp sysfillrect soundcore sysimgblt snd_pci_acp3x cfg80211 ipmi_devintf libarc4 ipmi_msghandler mac_hid sch_fq_codel parport_pc ppdev lp parport drm ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul psmouse ahci nvme libahci i2c_piix4 nvme_core r8169 realtek wmi video
>> CPU: 5 PID: 696 Comm: NetworkManager Tainted: G W 5.11.0-rc7+ #20
>> Hardware name: LENOVO 10VGCTO1WW/3130, BIOS M1XKT45A 08/21/2019
>> RIP: 0010:ath10k_debug_fw_stats_request+0x29a/0x2d0 [ath10k_core]
>> Code: 83 c4 10 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8d bf e8 20 00 00 be ff ff ff ff e8 de 2d 47 fa 85 c0 0f 85 8d fd ff ff <0f> 0b e9 86 fd ff ff 41 bf a1 ff ff ff 44 89 fa 48 c7 c6 2c 71 c4
>> RSP: 0018:ffffaffbc124b7d0 EFLAGS: 00010246
>> RAX: 0000000000000000 RBX: ffff93d02e4fec70 RCX: 0000000000000001
>> RDX: 0000000000000000 RSI: ffff93d00cba5248 RDI: ffff93d00ab309a0
>> RBP: ffffaffbc124b808 R08: 0000000000000000 R09: ffff93d02e4fec70
>> R10: 0000000000000001 R11: 0000000000000246 R12: ffff93d00cba3160
>> R13: ffff93d00cba3160 R14: ffff93d02e4fe4f0 R15: 0000000000000001
>> FS: 00007f7ce8d50bc0(0000) GS:ffff93d137d40000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 00007fc3595ad160 CR3: 000000010d492000 CR4: 00000000003506e0
>> Call Trace:
>> ? sta_info_get_bss+0xeb/0x1f0 [mac80211]
>> ath10k_sta_statistics+0x4f/0x280 [ath10k_core]
>> sta_set_sinfo+0xda/0xd20 [mac80211]
>> ieee80211_get_station+0x58/0x80 [mac80211]
>> nl80211_get_station+0xbd/0x340 [cfg80211]
>> genl_family_rcv_msg_doit+0xe7/0x150
>> genl_rcv_msg+0xe2/0x1e0
>> ? nl80211_dump_station+0x3a0/0x3a0 [cfg80211]
>> ? nl80211_send_station+0xef0/0xef0 [cfg80211]
>> ? genl_get_cmd+0xd0/0xd0
>> netlink_rcv_skb+0x55/0x100
>> genl_rcv+0x29/0x40
>> netlink_unicast+0x1a8/0x270
>> netlink_sendmsg+0x253/0x480
>> sock_sendmsg+0x65/0x70
>> ____sys_sendmsg+0x219/0x260
>> ? __import_iovec+0x32/0x170
>> ___sys_sendmsg+0xb7/0x100
>> ? end_opal_session+0x39/0xd0
>> ? __fget_files+0xe0/0x1d0
>> ? find_held_lock+0x31/0x90
>> ? __fget_files+0xe0/0x1d0
>> ? __fget_files+0x103/0x1d0
>> ? __fget_light+0x32/0x80
>> __sys_sendmsg+0x5a/0xa0
>> ? syscall_enter_from_user_mode+0x21/0x60
>> __x64_sys_sendmsg+0x1f/0x30
>> do_syscall_64+0x38/0x50
>> entry_SYSCALL_64_after_hwframe+0x44/0xa9
>> RIP: 0033:0x7f7cea2c791d
>> Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 4a ee ff 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 08 e8 9e ee ff ff 48
>> RSP: 002b:00007ffedf612a30 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
>> RAX: ffffffffffffffda RBX: 00005618c4cfec00 RCX: 00007f7cea2c791d
>> RDX: 0000000000000000 RSI: 00007ffedf612a80 RDI: 000000000000000b
>> RBP: 00007ffedf612a80 R08: 0000000000000000 R09: 00005618c4e74000
>> R10: 00005618c4da0590 R11: 0000000000000293 R12: 00005618c4cfec00
>> R13: 00005618c4cfe2c0 R14: 00007f7cea32ef80 R15: 00005618c4cff340
>> irq event stamp: 520897
>> hardirqs last enabled at (520903): [<ffffffffba501cc5>] console_unlock+0x4e5/0x5d0
>> hardirqs last disabled at (520908): [<ffffffffba501c38>] console_unlock+0x458/0x5d0
>> softirqs last enabled at (520722): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20
>> softirqs last disabled at (520717): [<ffffffffbb201002>] asm_call_irq_on_stack+0x12/0x20
>>
>> Signed-off-by: Shuah Khan <[email protected]>
>
> Bad timing, just yesterday I applied an identical patch:
>

Yes it is.

> https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=ath-next&id=7df28718928d08034b36168200d67b558ce36f3d
>

No worries. I will apply yours to my repo

thanks,
-- Shuah