====================================== | [1323.059409][T10691] #0: ffffffff87bdc8d0 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister (net/core/rtnetlink.c:671 net/core/rtnetlink.c:694) | [1323.059661][T10691] #1: ffffffff87bf7d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 net/core/rtnetlink.c:677 net/core/rtnetlink.c:694) | [ 1323.059878][T10691] | [ 1323.059878][T10691] stack backtrace: [ 1323.060251][T10691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1323.060532][T10691] Call Trace: [ 1323.060628][T10691] [1323.060696][T10691] dump_stack_lvl (lib/dump_stack.c:123) [1323.060826][T10691] print_circular_bug (kernel/locking/lockdep.c:2077) [1323.060951][T10691] check_noncircular (kernel/locking/lockdep.c:2206) [1323.061078][T10691] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2182) [1323.061205][T10691] ? __kernel_text_address (kernel/extable.c:79) [1323.061332][T10691] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [1323.061461][T10691] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [1323.061624][T10691] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) [1323.061758][T10691] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3528) [1323.061882][T10691] check_prev_add (kernel/locking/lockdep.c:3162) [1323.062006][T10691] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) [1323.062131][T10691] validate_chain (kernel/locking/lockdep.c:3281 kernel/locking/lockdep.c:3904) [1323.062257][T10691] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1323.062385][T10691] ? mark_lock (kernel/locking/lockdep.c:186 kernel/locking/lockdep.c:4731) [1323.062508][T10691] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1323.062632][T10691] __lock_acquire (kernel/locking/lockdep.c:5202) [1323.062761][T10691] lock_sync (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5876) [1323.062856][T10691] ? __synchronize_srcu (kernel/rcu/srcutree.c:1383) [1323.062981][T10691] __synchronize_srcu (kernel/rcu/srcutree.c:1388) [1323.063105][T10691] ? __pfx___synchronize_srcu (kernel/rcu/srcutree.c:1383) [1323.063230][T10691] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [1323.063381][T10691] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [1323.063487][T10691] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [1323.063622][T10691] ? ktime_get_mono_fast_ns (kernel/time/timekeeping.c:195 kernel/time/timekeeping.c:395 kernel/time/timekeeping.c:449 kernel/time/timekeeping.c:489) [1323.063757][T10691] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1323.063917][T10691] __rtnl_link_unregister (net/core/rtnetlink.c:657) [1323.064042][T10691] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [1323.064138][T10691] ? __pfx___rtnl_link_unregister (net/core/rtnetlink.c:652) [1323.064294][T10691] ? mark_held_locks (kernel/locking/lockdep.c:4321) [1323.064425][T10691] rtnl_link_unregister (net/core/rtnetlink.c:152 net/core/rtnetlink.c:696) [1323.064549][T10691] ? __pfx_rtnl_link_unregister (net/core/rtnetlink.c:691) [1323.064674][T10691] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) [1323.064801][T10691] nsim_module_exit (drivers/net/netdevsim/netdev.c:99) netdevsim [1323.064940][T10691] __do_sys_delete_module (kernel/module/main.c:757) [1323.065064][T10691] ? __pfx___do_sys_delete_module (kernel/module/main.c:702) [1323.065218][T10691] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [1323.065384][T10691] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [1323.065539][T10691] ? trace_rcu_segcb_stats (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:570 ./include/linux/cpumask.h:1117 ./include/trace/events/rcu.h:537) [1323.065666][T10691] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [1323.065825][T10691] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1323.065983][T10691] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1323.066108][T10691] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1323.066264][T10691] RIP: 0033:0x7fea994a35ab [ 1323.066394][T10691] Code: 73 01 c3 48 8b 0d 55 98 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 25 98 1b 00 f7 d8 64 89 01 48 All code ======== 0: 73 01 jae 0x3 2: c3 ret 3: 48 8b 0d 55 98 1b 00 mov 0x1b9855(%rip),%rcx # 0x1b985f a: f7 d8 neg %eax c: 64 89 01 mov %eax,%fs:(%rcx) f: 48 83 c8 ff or $0xffffffffffffffff,%rax 13: c3 ret 14: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 1b: 00 00 00 1e: 90 nop 1f: f3 0f 1e fa endbr64 23: b8 b0 00 00 00 mov $0xb0,%eax 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 8b 0d 25 98 1b 00 mov 0x1b9825(%rip),%rcx # 0x1b985f 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 ret 9: 48 8b 0d 25 98 1b 00 mov 0x1b9825(%rip),%rcx # 0x1b9835 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W [ 1323.066842][T10691] RSP: 002b:00007ffe0f8d54c8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 1323.067036][T10691] RAX: ffffffffffffffda RBX: 0000561be84d6ab0 RCX: 00007fea994a35ab [ 1323.067225][T10691] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000561be84d6b18 [ 1323.067414][T10691] RBP: 0000561be84d6ab0 R08: 0000000000000000 R09: 0000000000000000 [ 1323.067600][T10691] R10: 00007fea99602ac0 R11: 0000000000000206 R12: 0000561be84d6b18 Finger prints: print_circular_bug:check_noncircular:check_prev_add:validate_chain:__lock_acquire