====================================== | 0 | xx__-> [ 31.921527][ T280] ip (280) used greatest stack depth: 23072 bytes left | [ 32.569579][ C2] BUG: spinlock bad magic on CPU#2, ip/284 | [ 32.569780][ C2] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: ip/284, .owner_cpu: 2 [ 32.570218][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 32.570518][ C2] Call Trace: [ 32.570621][ C2] [ 32.570690][ C2] dump_stack_lvl (lib/dump_stack.c:122) [ 32.570830][ C2] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) [ 32.570968][ C2] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) [ 32.571101][ C2] 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) [ 32.571237][ C2] handle_softirqs (kernel/softirq.c:554) [ 32.571375][ C2] ? 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) [ 32.571514][ C2] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) [ 32.571612][ C2] [ 32.571680][ C2] [ 32.571747][ C2] __local_bh_enable_ip (kernel/softirq.c:382) [ 32.571878][ C2] dev_deactivate_many (net/sched/sch_generic.c:1356) [ 32.572010][ C2] ? 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) [ 32.572146][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 32.572313][ C2] dev_deactivate (./include/linux/list.h:111 ./include/linux/list.h:215 ./include/linux/list.h:229 net/sched/sch_generic.c:1398) [ 32.572446][ C2] ? __pfx_dev_deactivate (net/sched/sch_generic.c:1393) [ 32.572583][ C2] linkwatch_do_dev (net/core/link_watch.c:177) [ 32.572717][ C2] rtnl_getlink (net/core/rtnetlink.c:3853) [ 32.572858][ C2] ? __pfx_rtnl_getlink (net/core/rtnetlink.c:3798) [ 32.572990][ C2] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 32.573134][ C2] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) [ 32.573264][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) [ 32.573401][ C2] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 32.573533][ C2] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) [ 32.573668][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 32.573798][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) [ 32.573927][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.574061][ C2] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) [ 32.574192][ C2] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) [ 32.574321][ C2] ? 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) [ 32.574451][ C2] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) [ 32.574550][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5142) [ 32.574683][ C2] netlink_rcv_skb (net/netlink/af_netlink.c:2550) [ 32.574815][ C2] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) [ 32.574946][ C2] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) [ 32.575079][ C2] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) [ 32.575209][ C2] ? 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) [ 32.575340][ C2] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) [ 32.575471][ C2] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) [ 32.575600][ C2] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 32.575735][ C2] netlink_sendmsg (net/netlink/af_netlink.c:1901) [ 32.575865][ C2] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) [ 32.575998][ C2] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) [ 32.576131][ C2] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) [ 32.576265][ C2] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) [ 32.576397][ C2] ? __pfx_____sys_sendmsg (net/socket.c:2543) [ 32.576528][ C2] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) [ 32.576692][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5142) [ 32.576827][ C2] ___sys_sendmsg (net/socket.c:2653) [ 32.576958][ C2] ? __pfx____sys_sendmsg (net/socket.c:2640) [ 32.577090][ C2] ? find_held_lock (kernel/locking/lockdep.c:5249) [ 32.577221][ C2] ? __lock_release (kernel/locking/lockdep.c:5435) [ 32.577350][ C2] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) [ 32.577479][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) [ 32.577612][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 32.577743][ C2] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) [ 32.577873][ C2] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) [ 32.578006][ C2] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) [ 32.578139][ C2] ? move_addr_to_user (net/socket.c:299) [ 32.578269][ C2] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) [ 32.578399][ C2] ? __pfx___sys_sendmsg (net/socket.c:2668) [ 32.578533][ C2] ? __pfx___sys_setsockopt (net/socket.c:2337) [ 32.578667][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 32.578801][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 32.578961][ C2] RIP: 0033:0x7fbd7e1ef7b7 [ 32.579102][ C2] 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) [ 32.579565][ C2] RSP: 002b:00007ffc46fca738 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.579766][ C2] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbd7e1ef7b7 [ 32.579965][ C2] RDX: 0000000000000000 RSI: 00007ffc46fca7a0 RDI: 0000000000000006 [ 32.580162][ C2] RBP: 00007ffc46fca890 R08: 0000000000000008 R09: 0000000000000000 [ 32.580361][ C2] R10: 00007fbd7e0a8708 R11: 0000000000000246 R12: 00007ffc46fcb9e1 Finger prints: do_raw_spin_unlock:_raw_spin_unlock:net_tx_action:handle_softirqs:do_softirq