On Sun, Oct 8, 2017 at 8:43 PM, Jakub Kicinski <kubak...@wp.pl> wrote: > Hi! > > This appeared in net-next over the weekend - looks likely related to > this set... > > [ 164.456668] BUG: using smp_processor_id() in preemptible [00000000] code: > sshd/1255 > [ 164.472259] caller is ip6_pol_route+0xe88/0x4a80 > [ 164.477571] CPU: 10 PID: 1255 Comm: sshd Not tainted > 4.14.0-rc3-debug-00960-g58e545033ed7 #312 > [ 164.487350] Hardware name: Dell Inc. PowerEdge R730/072T6D, BIOS 2.3.4 > 11/08/2016 > [ 164.495884] Call Trace: > [ 164.498771] dump_stack+0xb3/0x140 > [ 164.502720] ? _atomic_dec_and_lock+0x2b0/0x2b0 > [ 164.507909] ? __lock_is_held+0xcf/0x1a0 > [ 164.512492] check_preemption_disabled+0x1a0/0x1d0 > [ 164.517974] ip6_pol_route+0xe88/0x4a80 > [ 164.522402] ? ip6_rt_update_pmtu+0xc0/0xc0 > [ 164.527205] ? unwind_get_return_address+0x5f/0xc0 > [ 164.532685] ? print_usage_bug+0x5a0/0x5a0 > [ 164.537399] ? lock_downgrade+0x740/0x740 > [ 164.542000] ? deref_stack_reg+0x75/0x230 > [ 164.546605] ? __read_once_size_nocheck.constprop.3+0x50/0x50 > [ 164.553158] ? print_usage_bug+0x5a0/0x5a0 > [ 164.557859] ? bpf_prog_alloc+0x330/0x330 > [ 164.562467] ? lock_downgrade+0x740/0x740 > [ 164.567076] ? __mod_tree_remove+0x40/0x40 > [ 164.571774] ? deref_stack_reg+0x75/0x230 > [ 164.576414] ? __read_once_size_nocheck.constprop.3+0x50/0x50 > [ 164.582964] ? deref_stack_reg+0x230/0x230 > [ 164.587676] ? __free_insn_slot+0x970/0x970 > [ 164.592507] ? print_usage_bug+0x5a0/0x5a0 > [ 164.597203] ? deref_stack_reg+0x75/0x230 > [ 164.601804] ? __read_once_size_nocheck.constprop.3+0x50/0x50 > [ 164.608412] ? show_rcu_gp_kthreads+0x160/0x160 > [ 164.613601] ? is_bpf_text_address+0xa4/0x130 > [ 164.618590] ? bpf_prog_alloc+0x330/0x330 > [ 164.623194] ? kernel_text_address+0xec/0x120 > [ 164.628200] ? cyc2ns_read_end+0x20/0x20 > [ 164.632705] ? __mod_tree_remove+0x40/0x40 > [ 164.637403] ? deref_stack_reg+0x75/0x230 > [ 164.642006] ? __read_once_size_nocheck.constprop.3+0x50/0x50 > [ 164.648552] ? deref_stack_reg+0x75/0x230 > [ 164.653165] ? sched_clock_cpu+0x18/0x290 > [ 164.657768] ? lock_downgrade+0x740/0x740 > [ 164.662383] ? bpf_prog_alloc+0x330/0x330 > [ 164.666978] ? lock_downgrade+0x740/0x740 > [ 164.671581] ? debug_check_no_locks_freed+0x2f0/0x2f0 > [ 164.677425] ? deref_stack_reg+0x75/0x230 > [ 164.677432] ? __read_once_size_nocheck.constprop.3+0x50/0x50 > [ 164.677438] ? deref_stack_reg+0x230/0x230 > [ 164.677445] ? deref_stack_reg+0x230/0x230 > [ 164.677458] ? rcu_read_lock_held+0xc0/0xc0 > [ 164.677466] ? __free_insn_slot+0x970/0x970 > [ 164.677476] ? rcu_is_watching+0x59/0x1f0 > [ 164.677483] ? show_rcu_gp_kthreads+0x160/0x160 > [ 164.677496] ? is_bpf_text_address+0xa4/0x130 > [ 164.677504] ? kernel_text_address+0xec/0x120 > [ 164.677509] ? __kernel_text_address+0xe/0x30 > [ 164.677516] ? __kernel_text_address+0xe/0x30 > [ 164.677523] ? unwind_get_return_address+0x5f/0xc0 > [ 164.677532] ? __save_stack_trace+0x83/0x120 > [ 164.677549] ? __lock_acquire+0x1fcf/0x4440 > [ 164.677557] ? save_trace+0x350/0x350 > [ 164.677566] ? cyc2ns_read_end+0x20/0x20 > [ 164.677580] ? debug_check_no_locks_freed+0x2f0/0x2f0 > [ 164.677589] ? ip6_pol_route_input+0x90/0x90 > [ 164.677595] fib6_rule_lookup+0x10a/0x750 > [ 164.677604] ? fib6_rules_seq_read+0x10/0x10 > [ 164.677623] ? lock_downgrade+0x740/0x740 > [ 164.677631] ? ip6_route_output_flags+0x1ff/0x310 > [ 164.677642] ip6_dst_lookup_tail+0x4ce/0xd50 > [ 164.677671] ip6_dst_lookup_flow+0xce/0x2a0 > [ 164.677679] ? ip6_dst_lookup+0x90/0x90 > [ 164.677684] ? __lock_is_held+0xcf/0x1a0 > [ 164.677690] ? show_rcu_gp_kthreads+0x160/0x160 > [ 164.677704] ip6_datagram_dst_update+0x728/0x1b00 > [ 164.677711] ? cyc2ns_read_end+0x20/0x20 > [ 164.677721] ? ip6_datagram_send_ctl+0x1400/0x1400 > [ 164.677733] ? print_usage_bug+0x5a0/0x5a0 > [ 164.677741] ? sched_clock_cpu+0x18/0x290 > [ 164.677759] ? lock_downgrade+0x740/0x740 > [ 164.677765] ? get_lock_stats+0x18/0x160 > [ 164.677788] ? __ip6_datagram_connect+0x51b/0x1410 > [ 164.677793] __ip6_datagram_connect+0x51b/0x1410 > [ 164.677803] ? ip6_datagram_release_cb+0x5f0/0x5f0 > [ 164.677809] ? mark_held_locks+0xce/0x170 > [ 164.677817] ? __local_bh_enable_ip+0x5f/0xa0 > [ 164.677830] ip6_datagram_connect+0x27/0x40 > [ 164.677839] SYSC_connect+0x1e8/0x4a0 > [ 164.677847] ? SYSC_bind+0x3e0/0x3e0 > [ 164.677856] ? get_unused_fd_flags+0x133/0x210 > [ 164.677863] ? trace_raw_output_sys_exit+0x110/0x110 > [ 164.677874] ? __close_fd+0x242/0x400 > [ 164.677883] ? sock_map_fd+0x3d/0x60 > [ 164.677893] ? entry_SYSCALL_64_fastpath+0x5/0xb1 > [ 164.677901] ? trace_hardirqs_on_caller+0x3cb/0x680 > [ 164.677908] ? trace_hardirqs_on_thunk+0x1a/0x1c > [ 164.677919] entry_SYSCALL_64_fastpath+0x1c/0xb1 > [ 164.677926] RIP: 0033:0x7f44264eb160 > [ 164.677931] RSP: 002b:00007ffe6e705f88 EFLAGS: 00000246 ORIG_RAX: > 000000000000002a > [ 164.677939] RAX: ffffffffffffffda RBX: 0000000000000046 RCX: > 00007f44264eb160 > [ 164.677943] RDX: 000000000000001c RSI: 000055de0fedc2b0 RDI: > 0000000000000003 > [ 164.677948] RBP: 00007ffe6e7060e0 R08: 0100007fffff0000 R09: > 0000000200001600 > [ 164.677952] R10: 0000000000000000 R11: 0000000000000246 R12: > 00007ffe6e706090 > [ 164.677956] R13: 00007ffe6e7060a0 R14: 0000000000000003 R15: > 00007ffe6e705f40
Hi Jakub This was discussed/reported earlier today by Ido. https://patchwork.ozlabs.org/patch/823011/ We will submit an official fix shortly. Thanks.
