====================================== | [6489.415272][T25092] #0: ffffffff989dcc10 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister (net/core/rtnetlink.c:678 net/core/rtnetlink.c:701) | [6489.415565][T25092] #1: ffffffff989f8e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 net/core/rtnetlink.c:684 net/core/rtnetlink.c:701) | [ 6489.415819][T25092] | [ 6489.415819][T25092] stack backtrace: [ 6489.416238][T25092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 6489.416554][T25092] Call Trace: [ 6489.416663][T25092] [6489.416739][T25092] dump_stack_lvl (lib/dump_stack.c:123) [6489.416885][T25092] print_circular_bug (kernel/locking/lockdep.c:2077) [6489.417026][T25092] check_noncircular (kernel/locking/lockdep.c:2206) [6489.417169][T25092] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2182) [6489.417314][T25092] ? __kernel_text_address (kernel/extable.c:79) [6489.417461][T25092] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [6489.417610][T25092] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [6489.417790][T25092] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) [6489.417936][T25092] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3528) [6489.418083][T25092] check_prev_add (kernel/locking/lockdep.c:3162) [6489.418225][T25092] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) [6489.418370][T25092] validate_chain (kernel/locking/lockdep.c:3281 kernel/locking/lockdep.c:3904) [6489.418531][T25092] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [6489.418682][T25092] ? mark_lock (kernel/locking/lockdep.c:186 kernel/locking/lockdep.c:4731) [6489.418825][T25092] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [6489.418970][T25092] __lock_acquire (kernel/locking/lockdep.c:5202) [6489.419118][T25092] lock_sync (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5876) [6489.419230][T25092] ? __synchronize_srcu (kernel/rcu/srcutree.c:1383) [6489.419373][T25092] __synchronize_srcu (kernel/rcu/srcutree.c:1388) [6489.419516][T25092] ? __pfx___synchronize_srcu (kernel/rcu/srcutree.c:1383) [6489.419662][T25092] ? 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) [6489.419807][T25092] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [6489.419926][T25092] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [6489.420073][T25092] ? 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) [6489.420218][T25092] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [6489.420398][T25092] __rtnl_link_unregister (net/core/rtnetlink.c:664) [6489.420541][T25092] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [6489.420648][T25092] ? __pfx___rtnl_link_unregister (net/core/rtnetlink.c:659) [6489.420834][T25092] ? mark_held_locks (kernel/locking/lockdep.c:4321) [6489.420983][T25092] rtnl_link_unregister (net/core/rtnetlink.c:152 net/core/rtnetlink.c:703) [6489.421132][T25092] ? __pfx_rtnl_link_unregister (net/core/rtnetlink.c:698) [6489.421275][T25092] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) [6489.421423][T25092] nsim_module_exit (drivers/net/netdevsim/netdev.c:99) netdevsim [6489.421578][T25092] __do_sys_delete_module (kernel/module/main.c:757) [6489.421722][T25092] ? __pfx___do_sys_delete_module (kernel/module/main.c:702) [6489.421901][T25092] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [6489.422084][T25092] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [6489.422262][T25092] ? 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) [6489.422408][T25092] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) [6489.422589][T25092] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [6489.422768][T25092] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [6489.422910][T25092] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 6489.423087][T25092] RIP: 0033:0x7f03107705ab [ 6489.423240][T25092] 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 [ 6489.423766][T25092] RSP: 002b:00007fffc631c9e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 6489.423988][T25092] RAX: ffffffffffffffda RBX: 00005578d2496ab0 RCX: 00007f03107705ab [ 6489.424202][T25092] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005578d2496b18 [ 6489.424421][T25092] RBP: 00005578d2496ab0 R08: 0000000000000000 R09: 0000000000000000 [ 6489.424637][T25092] R10: 00007f03108cfac0 R11: 0000000000000206 R12: 00005578d2496b18 Finger prints: print_circular_bug:check_noncircular:check_prev_add:validate_chain:__lock_acquire