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Subject[RT v5.11-rt7] WARNING at include/linux/seqlock.h:271 nft_counter_eval
Hi,

I'm seeing the following splat right after boot (or during late boot
phases) with v5.11-rt7 (LOCKDEP enabled).

[ 85.273583] ------------[ cut here ]------------
[ 85.273588] WARNING: CPU: 5 PID: 1416 at include/linux/seqlock.h:271 nft_counter_eval+0x95/0x130 [nft_counter]
[ 85.273600] Modules linked in: nft_counter tun bridge stp llc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6_tables nft_compat ip_set nf_tables nfnetlink cmac bnep sunrpc iwlmvm mac80211 intel_rapl_msr intel_rapl_common rtsx_usb_ms memstick sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp libarc4 crct10dif_pclmul crc32_pclmul joydev ghash_clmulni_intel iwlwifi rapl intel_cstate snd_hda_codec_realtek snd_hda_codec_generic intel_uncore cfg80211 ledtrig_audio wmi_bmof intel_wmi_thunderbolt btusb mei_wdt btrtl snd_hda_codec_hdmi pcspkr btbcm btintel bluetooth iTCO_wdt snd_hda_intel iTCO_vendor_support snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core ecdh_generic ecc rfkill snd_seq snd_seq_device snd_pcm snd_timer mei_me snd mei i2c_i801 i2c_smbus lpc_ich soundcore acpi_cpufreq ip_tables xfs libcrc32c nouveau sr_mod sd_mod cdrom t10_pi
[ 85.273678] hid_logitech_hidpp sg drm_ttm_helper ttm video drm_kms_helper rtsx_usb_sdmmc mmc_core syscopyarea sysfillrect sysimgblt fb_sys_fops hid_logitech_dj drm crc32c_intel mxm_wmi rtsx_usb igb ahci libahci ata_generic r8169 e1000e libata dca i2c_algo_bit realtek wmi dm_mirror dm_region_hash dm_log dm_mod fuse
[ 85.273707] CPU: 5 PID: 1416 Comm: irq/44-eno1 Tainted: G S 5.11.0-rt7 #4
[ 85.273711] Hardware name: LENOVO 30B6S2F900/1030, BIOS S01KT65A 08/06/2019
[ 85.273713] RIP: 0010:nft_counter_eval+0x95/0x130 [nft_counter]
[ 85.273718] Code: 6c f6 85 c0 74 26 65 8b 05 28 0f bf 3e 85 c0 75 1b 65 8b 05 1d fb a2 3e a9 ff ff ff 7f 75 0d 65 8b 05 03 0c a3 3e 85 c0 74 02 <0f> 0b 83 45 00 01 ff 74 24 28 4c 8d 6d 08 45 31 c9 31 c9 41 b8 01
[ 85.273722] RSP: 0018:ffffb1ec0d1cf7d0 EFLAGS: 00010202
[ 85.273725] RAX: 0000000000000001 RBX: ffffd1e3ffc173d0 RCX: 0000000000000001
[ 85.273726] RDX: ffff95c488d23580 RSI: ffffffffb6f8df42 RDI: ffffffffb6f5cafe
[ 85.273728] RBP: ffff95cbdfdee020 R08: 0000000000000002 R09: 0000000000000001
[ 85.273730] R10: 0000000000000100 R11: 0000000000000001 R12: ffffb1ec0d1cf9f8
[ 85.273732] R13: ffff95cc3acc6500 R14: ffff95cc3ad30ee8 R15: ffff95cc3ad30eb8
[ 85.273734] FS: 0000000000000000(0000) GS:ffff95cbdfc00000(0000) knlGS:0000000000000000
[ 85.273736] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 85.273738] CR2: 000056404f3b3300 CR3: 000000028833e001 CR4: 00000000001706e0
[ 85.273740] Call Trace:
[ 85.273752] nft_do_chain+0x17e/0x6a0 [nf_tables]
[ 85.273771] ? call_rcu+0x319/0x5e0
[ 85.273806] ? rt_cache_route+0x88/0xa0
[ 85.273817] ? ip_route_input_slow+0x9ea/0x11b0
[ 85.273832] ? sched_clock+0x5/0x10
[ 85.273847] ? __lock_acquire+0x3cb/0x15e0
[ 85.273910] nft_do_chain_ipv4+0x66/0x80 [nf_tables]
[ 85.273936] nf_hook_slow+0x44/0xc0
[ 85.273948] ip_local_deliver+0x10e/0x240
[ 85.273959] ? ip_protocol_deliver_rcu+0x2d0/0x2d0
[ 85.273972] ip_rcv+0x142/0x220
[ 85.273982] ? ip_rcv_finish_core.isra.22+0x5e0/0x5e0
[ 85.273995] __netif_receive_skb_core+0x5ee/0x1420
[ 85.274033] ? __netif_receive_skb_list_core+0x13b/0x2c0
[ 85.274036] __netif_receive_skb_list_core+0x13b/0x2c0
[ 85.274059] netif_receive_skb_list_internal+0x260/0x420
[ 85.274066] ? e1000_clean_rx_irq+0x31c/0x420 [e1000e]
[ 85.274100] napi_complete_done+0x6e/0x1b0
[ 85.274109] e1000e_poll+0xc9/0x290 [e1000e]
[ 85.274136] net_rx_action+0x112/0x550
[ 85.274161] __do_softirq+0xb8/0x5f4
[ 85.274188] __local_bh_enable_ip+0x13d/0x170
[ 85.274200] ? irq_finalize_oneshot.part.45+0xe0/0xe0
[ 85.274204] ? irq_thread+0xa7/0x1d0
[ 85.274205] irq_forced_thread_fn+0x6a/0x80
[ 85.274213] irq_thread+0x111/0x1d0
[ 85.274220] ? wake_threads_waitq+0x30/0x30
[ 85.274229] ? irq_thread_check_affinity+0xd0/0xd0
[ 85.274233] kthread+0x194/0x1b0
[ 85.274239] ? kthread_park+0x80/0x80
[ 85.274250] ret_from_fork+0x22/0x30
[ 85.274286] irq event stamp: 7056
[ 85.274288] hardirqs last enabled at (7058): [<ffffffffb5d8263b>] vprintk_store+0x45b/0x580
[ 85.274294] hardirqs last disabled at (7059): [<ffffffffb5d824ea>] vprintk_store+0x30a/0x580
[ 85.274298] softirqs last enabled at (6634): [<ffffffffb5cf5250>] __local_bh_enable_ip+0xc0/0x170
[ 85.274302] softirqs last disabled at (6644): [<ffffffffb5d87775>] irq_forced_thread_fn+0x5/0x80
[ 85.274304] ---[ end trace 0000000000000002 ]---

Please let me know if this is known already and/or if you need more
info (configs/etc).

Best,
Juri

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