====================================== | [ 63.153745][ T394] netdevsim netdevsim5417 eni5417np1: renamed from eth2 | [ 64.067620][ T414] devlink (414) used greatest stack depth: 23936 bytes left | [ 91.869437][ C3] BUG: spinlock bad magic on CPU#3, ip/765 | [ 91.869688][ C3] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: ip/765, .owner_cpu: 3 [ 91.870149][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 91.870462][ C3] Call Trace: [ 91.870572][ C3] [ 91.870645][ C3] dump_stack_lvl (lib/dump_stack.c:122) [ 91.870793][ C3] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) [ 91.870932][ C3] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) [ 91.871073][ C3] net_tx_action (./include/net/sch_generic.h:226 ./include/net/sch_generic.h:217 ./include/net/pkt_sched.h:128 ./include/net/pkt_sched.h:124 net/core/dev.c:5323) [ 91.871215][ C3] handle_softirqs (kernel/softirq.c:554) [ 91.871353][ C3] ? dev_deactivate_many (./include/linux/bottom_half.h:33 ./include/linux/netdevice.h:4448 net/sched/sch_generic.c:571 net/sched/sch_generic.c:1363) [ 91.871501][ C3] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) [ 91.871603][ C3] [ 91.871673][ C3] [ 91.871751][ C3] __local_bh_enable_ip (kernel/softirq.c:382) [ 91.871895][ C3] dev_deactivate_many (net/sched/sch_generic.c:1356) [ 91.872035][ C3] __dev_close_many (net/core/dev.c:1547) [ 91.872169][ C3] ? __pfx___dev_close_many (net/core/dev.c:1522) [ 91.872300][ C3] ? 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:227) [ 91.872436][ C3] dev_close_many (net/core/dev.c:1585) [ 91.872572][ C3] ? __pfx_dev_close_many (net/core/dev.c:1575) [ 91.872704][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 91.872840][ C3] unregister_netdevice_many_notify (net/core/dev.c:11321) [ 91.873012][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 91.873145][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) [ 91.873279][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 91.873412][ C3] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11288) [ 91.873580][ C3] ? sock_def_readable (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/core/sock.c:3377) [ 91.873715][ C3] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 91.873851][ C3] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 91.873991][ C3] ? unregister_netdevice_queue (net/core/dev.c:11273) [ 91.874156][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) [ 91.874290][ C3] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11272) [ 91.874456][ C3] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) [ 91.874560][ C3] ? __nla_validate_parse (./include/net/netlink.h:1267 (discriminator 1) lib/nlattr.c:622 (discriminator 1)) [ 91.874694][ C3] rtnl_dellink (net/core/rtnetlink.c:3254 net/core/rtnetlink.c:3304) [ 91.874831][ C3] ? 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:227) [ 91.874963][ C3] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3260) [ 91.875109][ C3] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) [ 91.875242][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) [ 91.875376][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 91.875510][ C3] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) [ 91.875642][ C3] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) [ 91.875774][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 91.875908][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) [ 91.876041][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 91.876179][ C3] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) [ 91.876311][ C3] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) [ 91.876444][ C3] ? 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:227) [ 91.876576][ C3] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) [ 91.876678][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5142) [ 91.876813][ C3] netlink_rcv_skb (net/netlink/af_netlink.c:2550) [ 91.876947][ C3] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) [ 91.877123][ C3] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) [ 91.877262][ C3] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) [ 91.877405][ C3] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 91.877543][ C3] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) [ 91.877681][ C3] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) [ 91.877817][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 91.877951][ C3] netlink_sendmsg (net/netlink/af_netlink.c:1901) [ 91.878086][ C3] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) [ 91.878222][ C3] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) [ 91.878360][ C3] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) [ 91.878500][ C3] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) [ 91.878639][ C3] ? __pfx_____sys_sendmsg (net/socket.c:2543) [ 91.878773][ C3] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) [ 91.878943][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) [ 91.879080][ C3] ___sys_sendmsg (net/socket.c:2653) [ 91.879217][ C3] ? __pfx____sys_sendmsg (net/socket.c:2640) [ 91.879351][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 91.879499][ C3] ? __lock_release (kernel/locking/lockdep.c:5435) [ 91.879635][ C3] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) [ 91.879811][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 91.879944][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 91.880086][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) [ 91.880253][ C3] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) [ 91.880392][ C3] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) [ 91.880533][ C3] ? __pfx___sys_sendmsg (net/socket.c:2668) [ 91.880667][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) [ 91.880817][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 91.880948][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 91.881119][ C3] RIP: 0033:0x7fb93cffc7b7 [ 91.881261][ C3] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 All code ======== 0: 0a 00 or (%rax),%al 2: f7 d8 neg %eax 4: 64 89 02 mov %eax,%fs:(%rdx) 7: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax e: eb b9 jmp 0xffffffffffffffc9 10: 0f 1f 00 nopl (%rax) 13: f3 0f 1e fa endbr64 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 10 jne 0x33 23: b8 2e 00 00 00 mov $0x2e,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 51 ja 0x83 32: c3 ret 33: 48 83 ec 28 sub $0x28,%rsp 37: 89 54 24 1c mov %edx,0x1c(%rsp) 3b: 48 89 74 24 10 mov %rsi,0x10(%rsp) Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 51 ja 0x59 8: c3 ret 9: 48 83 ec 28 sub $0x28,%rsp d: 89 54 24 1c mov %edx,0x1c(%rsp) 11: 48 89 74 24 10 mov %rsi,0x10(%rsp) [ 91.881751][ C3] RSP: 002b:00007ffc2b5b4818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.881955][ C3] RAX: ffffffffffffffda RBX: 00007ffc2b5b4f50 RCX: 00007fb93cffc7b7 [ 91.882154][ C3] RDX: 0000000000000000 RSI: 00007ffc2b5b4880 RDI: 0000000000000005 [ 91.882352][ C3] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 91.882554][ C3] R10: 00007fb93ceba4a8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: do_raw_spin_unlock:_raw_spin_unlock:net_tx_action:handle_softirqs:do_softirq