Following kernel warnings noticed on arm beagleboard X15 device while running
selftests: tc-testing: tdc.sh with stable-rc 6.1.
This is always reproducible with kselftest merge configs.
The build, config, vmlinux and test details links provided [1].
[ 228.686798] WARNING: inconsistent lock state
[ 228.193450] WARNING: CPU: 1 PID: 2386 at
include/linux/u64_stats_sync.h:145
__u64_stats_update_begin+0x180/0x1a4 [sch_gred]
[ 228.439208] WARNING: CPU: 1 PID: 2386 at
include/linux/seqlock.h:269 __u64_stats_update_begin+0x1a0/0x1a4
[sch_gred
Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
[ 204.305236] kselftest: Running tests in tc-testing
TAP version 13
1..1
# selftests: tc-testing: tdc.sh
# considering category actions
# -- buildebpf/SubPlugin.__init__
# Unable to import the scapy python module.
#
# If not already installed, you may do so with:
# pip3 install scapy==2.4.2
[ 207.264129] IPv6: ADDRCONF(NETDEV_CHANGE): v0p1: link becomes ready
[ 207.271331] IPv6: ADDRCONF(NETDEV_CHANGE): v0p0: link becomes ready
[ 228.188781] ------------[ cut here ]------------
[ 228.193450] WARNING: CPU: 1 PID: 2386 at
include/linux/u64_stats_sync.h:145
__u64_stats_update_begin+0x180/0x1a4 [sch_gred]
[ 228.204803] Modules linked in: sch_gred sch_multiq sch_cake
netdevsim psample iptable_raw ip6_tables vrf iptable_filter xt_state
ip_tables x_tables nft_masq nft_nat nft_chain_nat nf_nat nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 veth nf_tables libcrc32c nfnetlink
cfg80211 bluetooth snd_soc_simple_card snd_soc_simple_card_utils
etnaviv gpu_sched onboard_usb_hub snd_soc_davinci_mcasp
snd_soc_ti_udma snd_soc_ti_edma snd_soc_ti_sdma snd_soc_core ac97_bus
snd_pcm_dmaengine snd_pcm snd_timer snd soundcore display_connector
sch_fq_codel fuse
[ 228.252777] CPU: 1 PID: 2386 Comm: tc Not tainted 6.1.4-rc1 #1
[ 228.258666] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 228.264770] unwind_backtrace from show_stack+0x18/0x1c
[ 228.270050] show_stack from dump_stack_lvl+0x58/0x70
[ 228.275146] dump_stack_lvl from __warn+0xd0/0x1f0
[ 228.279968] __warn from warn_slowpath_fmt+0x64/0xc8
[ 228.284973] warn_slowpath_fmt from
__u64_stats_update_begin+0x180/0x1a4 [sch_gred]
[ 228.292694] __u64_stats_update_begin [sch_gred] from
gred_dump+0x1c0/0x790 [sch_gred]
[ 228.300689] gred_dump [sch_gred] from tc_fill_qdisc+0x154/0x44c
[ 228.306732] tc_fill_qdisc from qdisc_notify+0x11c/0x130
[ 228.312072] qdisc_notify from qdisc_graft+0x440/0x624
[ 228.317260] qdisc_graft from tc_modify_qdisc+0x558/0x850
[ 228.322692] tc_modify_qdisc from rtnetlink_rcv_msg+0x180/0x56c
[ 228.328674] rtnetlink_rcv_msg from netlink_rcv_skb+0xc0/0x118
[ 228.334533] netlink_rcv_skb from netlink_unicast+0x19c/0x268
[ 228.340301] netlink_unicast from netlink_sendmsg+0x1f8/0x484
[ 228.346099] netlink_sendmsg from ____sys_sendmsg+0x224/0x2bc
[ 228.351898] ____sys_sendmsg from ___sys_sendmsg+0x70/0x9c
[ 228.357421] ___sys_sendmsg from sys_sendmsg+0x54/0x90
[ 228.362579] sys_sendmsg from ret_fast_syscall+0x0/0x1c
[ 228.367858] Exception stack(0xf03f9fa8 to 0xf03f9ff0)
[ 228.372955] 9fa0: 00000000 00000001 00000003
bee09bdc 00000000 00000000
[ 228.381164] 9fc0: 00000000 00000001 b6f78800 00000128 626ad2dc
00000000 00000000 00076000
[ 228.389373] 9fe0: 00000128 bee09b78 b6dff253 b6d71ae6
[ 228.394561] irq event stamp: 25529
[ 228.398040] hardirqs last enabled at (25551): [<c03da980>]
__up_console_sem+0x58/0x68
[ 228.406005] hardirqs last disabled at (25558): [<c03da96c>]
__up_console_sem+0x44/0x68
[ 228.414001] softirqs last enabled at (25548): [<c0301fc8>]
__do_softirq+0x300/0x538
[ 228.421844] softirqs last disabled at (25537): [<c035a224>]
__irq_exit_rcu+0x14c/0x170
[ 228.429870] ---[ end trace 0000000000000000 ]---
[ 228.434509] ------------[ cut here ]------------
[ 228.439208] WARNING: CPU: 1 PID: 2386 at
include/linux/seqlock.h:269 __u64_stats_update_begin+0x1a0/0x1a4
[sch_gred]
[ 228.449829] Modules linked in: sch_gred sch_multiq sch_cake
netdevsim psample iptable_raw ip6_tables vrf iptable_filter xt_state
ip_tables x_tables nft_masq nft_nat nft_chain_nat nf_nat nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 veth nf_tables libcrc32c nfnetlink
cfg80211 bluetooth snd_soc_simple_card snd_soc_simple_card_utils
etnaviv gpu_sched onboard_usb_hub snd_soc_davinci_mcasp
snd_soc_ti_udma snd_soc_ti_edma snd_soc_ti_sdma snd_soc_core ac97_bus
snd_pcm_dmaengine snd_pcm snd_timer snd soundcore display_connector
sch_fq_codel fuse
[ 228.497802] CPU: 1 PID: 2386 Comm: tc Tainted: G W
6.1.4-rc1 #1
[ 228.505157] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 228.511291] unwind_backtrace from show_stack+0x18/0x1c
[ 228.516571] show_stack from dump_stack_lvl+0x58/0x70
[ 228.521636] dump_stack_lvl from __warn+0xd0/0x1f0
[ 228.526458] __warn from warn_slowpath_fmt+0x64/0xc8
[ 228.531494] warn_slowpath_fmt from
__u64_stats_update_begin+0x1a0/0x1a4 [sch_gred]
[ 228.539184] __u64_stats_update_begin [sch_gred] from
gred_dump+0x1c0/0x790 [sch_gred]
[ 228.547180] gred_dump [sch_gred] from tc_fill_qdisc+0x154/0x44c
[ 228.553222] tc_fill_qdisc from qdisc_notify+0x11c/0x130
[ 228.558593] qdisc_notify from qdisc_graft+0x440/0x624
[ 228.563751] qdisc_graft from tc_modify_qdisc+0x558/0x850
[ 228.569183] tc_modify_qdisc from rtnetlink_rcv_msg+0x180/0x56c
[ 228.575164] rtnetlink_rcv_msg from netlink_rcv_skb+0xc0/0x118
[ 228.581024] netlink_rcv_skb from netlink_unicast+0x19c/0x268
[ 228.586822] netlink_unicast from netlink_sendmsg+0x1f8/0x484
[ 228.592590] netlink_sendmsg from ____sys_sendmsg+0x224/0x2bc
[ 228.598388] ____sys_sendmsg from ___sys_sendmsg+0x70/0x9c
[ 228.603912] ___sys_sendmsg from sys_sendmsg+0x54/0x90
[ 228.609100] sys_sendmsg from ret_fast_syscall+0x0/0x1c
[ 228.614349] Exception stack(0xf03f9fa8 to 0xf03f9ff0)
[ 228.619415] 9fa0: 00000000 00000001 00000003
bee09bdc 00000000 00000000
[ 228.627655] 9fc0: 00000000 00000001 b6f78800 00000128 626ad2dc
00000000 00000000 00076000
[ 228.635864] 9fe0: 00000128 bee09b78 b6dff253 b6d71ae6
[ 228.641052] irq event stamp: 25921
[ 228.644470] hardirqs last enabled at (25929): [<c03da980>]
__up_console_sem+0x58/0x68
[ 228.652465] hardirqs last disabled at (25938): [<c03da96c>]
__up_console_sem+0x44/0x68
[ 228.660491] softirqs last enabled at (25920): [<c0301fc8>]
__do_softirq+0x300/0x538
[ 228.668334] softirqs last disabled at (25957): [<c035a224>]
__irq_exit_rcu+0x14c/0x170
[ 228.676300] ---[ end trace 0000000000000000 ]---
[ 228.680999]
[ 228.682495] ================================
[ 228.686798] WARNING: inconsistent lock state
[ 228.691070] 6.1.4-rc1 #1 Tainted: G W
[ 228.696136] --------------------------------
[ 228.700439] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
[ 228.706481] tc/2386 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 228.711303] c96870b4 (&syncp->seq#14){+.?.}-{0:0}, at:
gred_dump+0x1c0/0x790 [sch_gred]
[ 228.719360] {IN-SOFTIRQ-W} state was registered at:
[ 228.724273] __u64_stats_update_begin+0x10c/0x1a4
[ 228.729095] __dev_queue_xmit+0xcac/0x1288
[ 228.733306] arp_process+0x8cc/0x95c
[ 228.736999] __netif_receive_skb_one_core+0x58/0x74
[ 228.741973] netif_receive_skb+0xe4/0x474
[ 228.746093] cpsw_rx_handler+0x1a0/0x42c
[ 228.750122] __cpdma_chan_process+0xf4/0x188
[ 228.754516] cpdma_chan_process+0x44/0x5c
[ 228.758636] cpsw_rx_mq_poll+0x4c/0x9c
[ 228.762512] __napi_poll+0x3c/0x28c
[ 228.766113] net_rx_action+0x160/0x350
[ 228.769958] __do_softirq+0x130/0x538
[ 228.773712] call_with_stack+0x18/0x20
[ 228.777587] do_softirq+0xb0/0xb4
[ 228.781005] __local_bh_enable_ip+0x180/0x1b8
[ 228.785461] ip_finish_output2+0x21c/0xb74
[ 228.789672] ip_send_skb+0x58/0x120
[ 228.793273] udp_send_skb+0x13c/0x38c
[ 228.797027] udp_sendmsg+0x920/0xe28
[ 228.800720] ____sys_sendmsg+0x224/0x2bc
[ 228.804748] ___sys_sendmsg+0x70/0x9c
[ 228.808502] sys_sendmsg+0x54/0x90
[ 228.812011] __sys_trace_return+0x0/0x10
[ 228.816040] irq event stamp: 25991
[ 228.819458] hardirqs last enabled at (25991): [<c03da980>]
__up_console_sem+0x58/0x68
[ 228.827423] hardirqs last disabled at (25990): [<c03da96c>]
__up_console_sem+0x44/0x68
[ 228.835388] softirqs last enabled at (25970): [<c0301fc8>]
__do_softirq+0x300/0x538
[ 228.843170] softirqs last disabled at (25957): [<c035a224>]
__irq_exit_rcu+0x14c/0x170
[ 228.851135]
[ 228.851135] other info that might help us debug this:
[ 228.857666] Possible unsafe locking scenario:
[ 228.857666]
[ 228.863616] CPU0
[ 228.866088] ----
[ 228.868530] lock(&syncp->seq#14);
[ 228.872039] <Interrupt>
[ 228.874694] lock(&syncp->seq#14);
[ 228.878387]
[ 228.878387] *** DEADLOCK ***
[ 228.878387]
[ 228.884307] 1 lock held by tc/2386:
[ 228.887817] #0: c25b0760 (rtnl_mutex){+.+.}-{3:3}, at:
qdisc_create+0x3cc/0x5bc
[ 228.895294]
[ 228.895294] stack backtrace:
[ 228.899658] CPU: 1 PID: 2386 Comm: tc Tainted: G W
6.1.4-rc1 #1
[ 228.907012] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 228.913146] unwind_backtrace from show_stack+0x18/0x1c
[ 228.918395] show_stack from dump_stack_lvl+0x58/0x70
[ 228.923492] dump_stack_lvl from mark_lock.part.0+0xb74/0x128c
[ 228.929351] mark_lock.part.0 from __lock_acquire+0x984/0x2a8c
[ 228.935211] __lock_acquire from lock_acquire+0x110/0x364
[ 228.940643] lock_acquire from __u64_stats_update_begin+0x10c/0x1a4
[sch_gred]
[ 228.947906] __u64_stats_update_begin [sch_gred] from
gred_dump+0x1c0/0x790 [sch_gred]
[ 228.955871] gred_dump [sch_gred] from tc_fill_qdisc+0x154/0x44c
[ 228.961914] tc_fill_qdisc from qdisc_notify+0x11c/0x130
[ 228.967254] qdisc_notify from qdisc_graft+0x440/0x624
[ 228.972442] qdisc_graft from tc_modify_qdisc+0x558/0x850
[ 228.977874] tc_modify_qdisc from rtnetlink_rcv_msg+0x180/0x56c
[ 228.983825] rtnetlink_rcv_msg from netlink_rcv_skb+0xc0/0x118
[ 228.989685] netlink_rcv_skb from netlink_unicast+0x19c/0x268
[ 228.995452] netlink_unicast from netlink_sendmsg+0x1f8/0x484
[ 229.001220] netlink_sendmsg from ____sys_sendmsg+0x224/0x2bc
[ 229.007019] ____sys_sendmsg from ___sys_sendmsg+0x70/0x9c
[ 229.012542] ___sys_sendmsg from sys_sendmsg+0x54/0x90
[ 229.017700] sys_sendmsg from ret_fast_syscall+0x0/0x1c
[ 229.022979] Exception stack(0xf03f9fa8 to 0xf03f9ff0)
[ 229.028045] 9fa0: 00000000 00000001 00000003
bee09bdc 00000000 00000000
[ 229.036285] 9fc0: 00000000 00000001 b6f78800 00000128 626ad2dc
00000000 00000000 00076000
[ 229.044494] 9fe0: 00000128 bee09b78 b6dff253 b6d71ae6
[ 232.169219] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 232.528900] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 232.913879] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 233.339508] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 233.720397] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 234.080047] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 234.460174] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 234.540374] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 234.950683] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
[ 235.029327] sch_tbf: burst 1500 is lower than device dummy1 mtu (1514) !
#
# -----> teardown stage *** Could not execute: \"$TC qdisc del dev
$DUMMY handle 1: root\"
#
# -----> teardown stage *** Error message: \"Error: Invalid handle.
# \"
#
# -----> teardown stage *** Aborting test run.
#
[1]
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y/build/v6.1.3-208-ga31425cbf493/testrun/13974102/suite/log-parser-test/tests/
https://lkft.validation.linaro.org/scheduler/job/6022394#L4509
metadata:
git_ref: linux-6.1.y
git_repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
git_sha: a31425cbf493ef8bc7f7ce775a1028b1e0612f32
git_describe: v6.1.3-208-ga31425cbf493
kernel_version: 6.1.4-rc1
kernel-config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2JrzrHzfFQKu8CwO4A3HTPI51of/config
build-url: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc/-/pipelines/738268273
artifact-location:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2JrzrHzfFQKu8CwO4A3HTPI51of
toolchain: gcc-10
vmlinux.xz: https://storage.tuxsuite.com/public/linaro/lkft/builds/2JrzrHzfFQKu8CwO4A3HTPI51of/vmlinux.xz
System.map: https://storage.tuxsuite.com/public/linaro/lkft/builds/2JrzrHzfFQKu8CwO4A3HTPI51of/System.map
--
Linaro LKFT
https://lkft.linaro.org
