Description of problem: Got kernel WARNING at Fedora-26 as a pNFS server ''' WARNING: CPU: 0 PID: 0 at kernel/cgroup/cgroup.c:441 cgroup_get+0x4b/0x60 ... ''' Version-Release number of selected component (if applicable): Fedora-26-20170605.n.0 4.11.0-2.fc26.x86_64 How reproducible: TBD Steps to Reproduce: - Actual results: ''' Checking dmesg for specific failures! [ 250.900627] ------------[ cut here ]------------ [ 250.905796] WARNING: CPU: 0 PID: 0 at kernel/cgroup/cgroup.c:441 cgroup_get+0x4b/0x60 [ 250.914538] Modules linked in: xfs libcrc32c iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi binfmt_misc coretemp iTCO_wdt kvm_intel gpio_ich iTCO_vendor_support i5000_edac e1000e ptp kvm pps_core edac_core lpc_ich irqbypass i2c_i801 i5k_amb shpchp acpi_cpufreq tpm_tis tpm_tis_core tpm nfsd auth_rpcgss nfs_acl lockd grace sunrpc mgag200 i2c_algo_bit drm_kms_helper ttm drm serio_raw ata_generic pata_acpi stex [ 250.955414] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.0-2.fc26.x86_64 #1 [ 250.963376] Hardware name: NEC Express5800/120Eh [N8100-1236]/7VCSL-NJ, BIOS 1.0.5G43 10/12/2006 [ 250.973179] Call Trace: [ 250.975906] <IRQ> [ 250.978152] dump_stack+0x63/0x84 [ 250.981840] __warn+0xcb/0xf0 [ 250.985148] warn_slowpath_null+0x1d/0x20 [ 250.989620] cgroup_get+0x4b/0x60 [ 250.993315] cgroup_sk_alloc+0x32/0xe0 [ 250.997496] sk_clone_lock+0x328/0x3b0 [ 251.001677] inet_csk_clone_lock+0x16/0xe0 [ 251.006247] tcp_create_openreq_child+0x23/0x450 [ 251.011399] tcp_v6_syn_recv_sock+0xa5/0x760 [ 251.016163] tcp_check_req+0x3af/0x510 [ 251.020342] ? tcp_v6_inbound_md5_hash+0x68/0x1d0 [ 251.025591] ? fib_rules_lookup+0x130/0x1a0 [ 251.030257] tcp_v6_rcv+0x4db/0x970 [ 251.034148] ? ip6_pol_route+0x770/0x770 [ 251.038522] ip6_input_finish+0xc7/0x450 [ 251.042896] ip6_input+0x3f/0xb0 [ 251.046494] ip6_rcv_finish+0x89/0xf0 [ 251.050578] ipv6_rcv+0x343/0x550 [ 251.054274] ? packet_rcv+0x44/0x430 [ 251.058262] __netif_receive_skb_core+0x38b/0xa60 [ 251.063510] ? tcp6_gro_receive+0x50/0x1b0 [ 251.068079] ? ipv6_gro_receive+0x1a1/0x370 [ 251.072745] __netif_receive_skb+0x18/0x60 [ 251.077313] netif_receive_skb_internal+0x40/0xb0 [ 251.082561] napi_gro_receive+0x108/0x140 [ 251.087049] e1000_receive_skb+0x8a/0x130 [e1000e] [ 251.092395] ? __napi_alloc_skb+0xa1/0xf0 [ 251.096871] e1000_clean_rx_irq+0x1fb/0x3d0 [e1000e] [ 251.102413] e1000e_poll+0x78/0x2d0 [e1000e] [ 251.107178] ? find_next_bit+0xb/0x10 [ 251.111260] net_rx_action+0x14a/0x3e0 [ 251.115441] __do_softirq+0xea/0x2e3 [ 251.119429] irq_exit+0xfb/0x100 [ 251.123027] do_IRQ+0x80/0xd0 [ 251.126335] common_interrupt+0x93/0x93 [ 251.130612] RIP: 0010:mwait_idle+0x93/0x160 [ 251.135277] RSP: 0000:ffffffffb7e03df0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff5d [ 251.143725] RAX: 0000000000000000 RBX: ffffffffb7e104c0 RCX: 0000000000000000 [ 251.151686] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 251.159647] RBP: ffffffffb7e03e08 R08: 0000003a728283ca R09: ffff9b667625af48 [ 251.167607] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 251.175570] R13: ffffffffb7e104c0 R14: 0000000000000000 R15: 0000000000000000 [ 251.183531] </IRQ> [ 251.185870] arch_cpu_idle+0xf/0x20 [ 251.189759] default_idle_call+0x23/0x30 [ 251.194135] do_idle+0x170/0x200 [ 251.197733] cpu_startup_entry+0x71/0x80 [ 251.202107] rest_init+0x77/0x80 [ 251.205707] start_kernel+0x45a/0x47b [ 251.209791] ? early_idt_handler_array+0x120/0x120 [ 251.215134] x86_64_start_reservations+0x24/0x26 [ 251.220284] x86_64_start_kernel+0x13c/0x15f [ 251.225046] start_cpu+0x14/0x14 [ 251.228666] ---[ end trace e12e9f188b22bf70 ]--- End of log. ''' Expected results: fine Additional info:
We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. The kernel moves very fast so bugs may get fixed as part of a kernel update. Due to this, we are doing a mass bug update across all of the Fedora 26 kernel bugs. Fedora 26 has now been rebased to 4.15.4-200.fc26. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 27, and are still experiencing this issue, please change the version to Fedora 27. If you experience different issues, please open a new bug report for those.
Now I can not reproduce it on Fedora 27. feel free to re-open it if any one get same issue on Fedora 27