linux-kernel - [Softirq] a76eadba0d: WARNING:at_net/mac80211/rx.c:#ieee80211_rx

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Date:   Thu, 23 Jul 2020 17:17:15 +0800
From:   kernel test robot <lkp@...el.com>
To:     qianjun.kernel@...il.com
Cc:     tglx@...utronix.de, peterz@...radead.org, will@...nel.org,
        luto@...nel.org, linux-kernel@...r.kernel.org, urezki@...il.com,
        laoar.shao@...il.com, jun qian <qianjun.kernel@...il.com>,
        0day robot <lkp@...el.com>, lkp@...ts.01.org
Subject: [Softirq] a76eadba0d:
 WARNING:at_net/mac80211/rx.c:#ieee80211_rx_napi[mac80211]

Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: a76eadba0db10b76d2e966059f25d01993e3e1a1 ("[RFC PATCH v2] Softirq:avoid large sched delay from the pending softirqs")
url: https://github.com/0day-ci/linux/commits/qianjun-kernel-gmail-com/Softirq-avoid-large-sched-delay-from-the-pending-softirqs/20200720-211120
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 5714ee50bb4375bd586858ad800b1d9772847452

in testcase: hwsim
with following parameters:

	group: hwsim-28



on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 8 -m 16G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+----------------------------------------------------------------------------+------------+------------+
|                                                                            | 5714ee50bb | a76eadba0d |
+----------------------------------------------------------------------------+------------+------------+
| boot_successes                                                             | 11         | 9          |
| boot_failures                                                              | 1          | 18         |
| BUG:kernel_hang_in_boot_stage                                              | 1          |            |
| Kernel_panic-not_syncing:VFS:Unable_to_mount_root_fs_on_unknown-block(#,#) | 0          | 2          |
| WARNING:at_net/mac80211/rx.c:#ieee80211_rx_napi[mac80211]                  | 0          | 16         |
| RIP:ieee80211_rx_napi[mac80211]                                            | 0          | 16         |
| INFO:rcu_sched_self-detected_stall_on_CPU                                  | 0          | 6          |
| RIP:console_unlock                                                         | 0          | 6          |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks                               | 0          | 6          |
| RIP:x2apic_send_IPI                                                        | 0          | 5          |
| RIP:vprintk_emit                                                           | 0          | 5          |
| RIP:default_idle                                                           | 0          | 3          |
| RIP:io_serial_in                                                           | 0          | 1          |
+----------------------------------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>


[  106.856151] WARNING: CPU: 5 PID: 4569 at net/mac80211/rx.c:4708 ieee80211_rx_napi+0x44d/0x560 [mac80211]
[  106.858369] Modules linked in: ccm mac80211_hwsim mac80211 cfg80211 rfkill libarc4 sr_mod cdrom sg ata_generic bochs_drm intel_rapl_msr drm_vram_helper ipmi_devintf drm_ttm_helper intel_rapl_common ttm ipmi_msghandler crct10dif_pclmul drm_kms_helper crc32_pclmul crc32c_intel ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops ppdev ata_piix parport_pc drm joydev parport serio_raw libata i2c_piix4 ip_tables
[  106.873183] CPU: 5 PID: 4569 Comm: hostapd Not tainted 5.8.0-rc6-00002-ga76eadba0db10 #1
[  106.879825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[  106.883913] RIP: 0010:ieee80211_rx_napi+0x44d/0x560 [mac80211]
[  106.887468] Code: 45 44 24 04 89 44 24 04 e9 6d fd ff ff 0f 0b e9 72 fe ff ff 0f b6 45 4a 83 e8 01 3c 07 0f 87 97 fe ff ff 31 d2 e9 7a fc ff ff <0f> 0b e9 55 fe ff ff 4c 89 e7 e8 84 ff 0d cf 48 85 c0 0f 84 14 fe
[  106.894436] RSP: 0018:ffffb0d280188e90 EFLAGS: 00010246
[  106.899763] RAX: 0000000000000000 RBX: ffff90c0e39847e0 RCX: 0000000000000000
[  106.903868] RDX: ffff90c0e3985ec8 RSI: 0000000000000000 RDI: ffff90c0e39847e0
[  106.906345] RBP: ffff90c0e392e500 R08: 0000000000000000 R09: ffffffffc0873000
[  106.911449] R10: ffff90c0e392fd00 R11: 0000000000000001 R12: ffff90c0e392e500
[  106.913620] R13: 0000000000000000 R14: 0000000000000040 R15: ffffffff906050e0
[  106.920097] FS:  00007ffbb8a4eb80(0000) GS:ffff90c17fd40000(0000) knlGS:0000000000000000
[  106.922530] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  106.924537] CR2: 00007fdb4bae4d50 CR3: 00000003a393c000 CR4: 00000000000406e0
[  106.926725] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  106.928974] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  106.941826] Call Trace:
[  106.943761]  <IRQ>
[  106.945475]  ? ieee80211_tx_status+0x71/0xa0 [mac80211]
[  106.961847]  ? kmem_cache_free+0x212/0x280
[  106.964038]  ieee80211_tasklet_handler+0xbc/0xd0 [mac80211]
[  106.966220]  tasklet_action_common+0x4f/0x100
[  106.968344]  __do_softirq+0xe7/0x32e
[  106.970246]  asm_call_on_stack+0x12/0x20
[  106.972192]  </IRQ>
[  106.977831]  do_softirq_own_stack+0x39/0x50
[  106.979993]  do_softirq+0x2b/0x30
[  106.982020]  __local_bh_enable_ip+0x4b/0x50
[  106.984023]  ieee80211_mgmt_tx+0x466/0x590 [mac80211]
[  106.986185]  ? skb_partial_csum_set+0x60/0x80
[  106.988239]  cfg80211_mlme_mgmt_tx+0x108/0x310 [cfg80211]
[  107.005903]  nl80211_tx_mgmt+0x292/0x3b0 [cfg80211]
[  107.008082]  genl_rcv_msg+0x1a4/0x2fc
[  107.009886]  ? genl_start+0x140/0x140
[  107.011725]  netlink_rcv_skb+0x49/0x110
[  107.016692]  genl_rcv+0x24/0x40
[  107.018603]  netlink_unicast+0x191/0x230
[  107.020501]  netlink_sendmsg+0x243/0x480
[  107.022365]  sock_sendmsg+0x5e/0x60
[  107.032305]  ____sys_sendmsg+0x1f3/0x260
[  107.034175]  ? copy_msghdr_from_user+0x5c/0x90
[  107.039443]  ___sys_sendmsg+0x81/0xc0
[  107.041151]  ? __generic_file_write_iter+0xf9/0x1d0
[  107.042989]  ? generic_file_write_iter+0x106/0x173
[  107.044793]  ? __cgroup_bpf_run_filter_setsockopt+0xb9/0x320
[  107.046678]  __sys_sendmsg+0x59/0xa0
[  107.048170]  do_syscall_64+0x4c/0x90
[  107.049696]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  107.065381] RIP: 0033:0x7ffbb8b6d914
[  107.068221] Code: Bad RIP value.
[  107.069764] RSP: 002b:00007ffcae5590c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  107.071892] RAX: ffffffffffffffda RBX: 000055dba32b81b0 RCX: 00007ffbb8b6d914
[  107.073939] RDX: 0000000000000000 RSI: 00007ffcae559100 RDI: 0000000000000007
[  107.079830] RBP: 000055dba32c3b20 R08: 0000000000000004 R09: 00007ffbb8c2f3a0
[  107.081785] R10: 00007ffcae5591dc R11: 0000000000000246 R12: 000055dba32b80c0
[  107.086149] R13: 00007ffcae559100 R14: 00007ffcae559238 R15: 00007ffcae5591dc
[  107.088023] ---[ end trace abbdb1b7b4425524 ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.8.0-rc6-00002-ga76eadba0db10 .config
	make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
lkp


View attachment "config-5.8.0-rc6-00002-ga76eadba0db10" of type "text/plain" (158415 bytes)

View attachment "job-script" of type "text/plain" (5073 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (172188 bytes)

View attachment "hwsim" of type "text/plain" (93838 bytes)