======================================
| [ 24.769788][ T382] #0: ffffffffa21e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011)
| [ 24.770246][ T382] #1: ffffffffa21d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [ 24.770756][ T382]
| [ 24.770756][ T382] stack backtrace:
[ 24.771463][ T382] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.771779][ T382] Call Trace:
[ 24.771972][ T382] <TASK>
[ 24.772105][ T382] dump_stack_lvl (lib/dump_stack.c:123)
[ 24.772365][ T382] print_deadlock_bug (kernel/locking/lockdep.c:3040)
[ 24.772624][ T382] validate_chain (kernel/locking/lockdep.c:3894)
[ 24.772879][ T382] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 24.773135][ T382] ? 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)
[ 24.773384][ T382] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 24.773582][ T382] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 24.773840][ T382] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 24.774091][ T382] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 24.774407][ T382] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 24.774662][ T382] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 24.774919][ T382] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 24.775175][ T382] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 24.775493][ T382] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526)
[ 24.775687][ T382] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 24.776002][ T382] ? __pfx_down_read (kernel/locking/rwsem.c:1522)
[ 24.776259][ T382] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 24.776514][ T382] netdev_update_features (net/core/dev.c:10314)
[ 24.776768][ T382] ? __pfx_netdev_update_features (net/core/dev.c:10311)
[ 24.777095][ T382] vlan_device_event (net/8021q/vlan.c:430 (discriminator 2)) 8021q
[ 24.777422][ T382] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q
[ 24.777742][ T382] ? packet_notifier (net/packet/af_packet.c:4282)
[ 24.777999][ T382] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 24.778254][ T382] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 24.778509][ T382] netdev_update_features (net/core/dev.c:10314)
[ 24.778769][ T382] ? __pfx_netdev_update_features (net/core/dev.c:10311)
[ 24.779081][ T382] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)
[ 24.779395][ T382] ? br_del_if (net/bridge/br_if.c:748) bridge
[ 24.779708][ T382] br_del_if (net/bridge/br_if.c:753) bridge
[ 24.780015][ T382] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 24.780270][ T382] do_set_master (net/core/rtnetlink.c:2903)
[ 24.780527][ T382] do_setlink.constprop.0 (net/core/rtnetlink.c:3116)
[ 24.780787][ T382] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2990)
[ 24.781104][ T382] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 24.781350][ T382] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011)
[ 24.781612][ T382] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3912)
[ 24.781862][ T382] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6902)
[ 24.782113][ T382] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:104)
[ 24.782371][ T382] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79)
[ 24.782694][ T382] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 24.782946][ T382] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37))
[ 24.783200][ T382] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735)
[ 24.783453][ T382] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 24.783704][ T382] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011)
[ 24.783956][ T382] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 24.784207][ T382] ? __rtnl_newlink (net/core/rtnetlink.c:3862)
[ 24.784461][ T382] rtnl_newlink (net/core/rtnetlink.c:336 net/core/rtnetlink.c:4013)
[ 24.784722][ T382] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903)
[ 24.784974][ T382] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 24.785226][ T382] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 24.785477][ T382] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 24.785731][ T382] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900)
[ 24.785980][ T382] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903)
[ 24.786228][ T382] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902)
[ 24.786481][ T382] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 24.786728][ T382] ? 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)
[ 24.786977][ T382] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 24.787171][ T382] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 24.787423][ T382] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 24.787675][ T382] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 24.787924][ T382] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 24.788188][ T382] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 24.788439][ T382] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 24.788689][ T382] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 24.788940][ T382] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 24.789188][ T382] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 24.789436][ T382] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 24.789687][ T382] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 24.789947][ T382] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594)
[ 24.790199][ T382] ? __pfx_____sys_sendmsg (net/socket.c:2540)
[ 24.790446][ T382] ? __pfx_copy_msghdr_from_user (net/socket.c:2520)
[ 24.790762][ T382] ___sys_sendmsg (net/socket.c:2650)
[ 24.791015][ T382] ? __pfx____sys_sendmsg (net/socket.c:2637)
[ 24.791269][ T382] ? kasan_save_stack (mm/kasan/common.c:49)
[ 24.791532][ T382] ? kasan_save_stack (mm/kasan/common.c:48)
[ 24.791785][ T382] ? __kasan_record_aux_stack (mm/kasan/generic.c:544)
[ 24.792045][ T382] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:123 kernel/rcu/tree.c:3087)
[ 24.792359][ T382] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539)
[ 24.792612][ T382] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 24.792864][ T382] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 24.793179][ T382] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 24.793431][ T382] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 24.793686][ T382] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 24.793946][ T382] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65)
[ 24.794202][ T382] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 24.794452][ T382] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 24.794705][ T382] __sys_sendmsg (net/socket.c:2680)
[ 24.794959][ T382] ? __pfx___sys_sendmsg (net/socket.c:2665)
[ 24.795212][ T382] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643)
[ 24.795537][ T382] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 24.795795][ T382] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 24.796109][ T382] RIP: 0033:0x7fe6ac0879a7
[ 24.796374][ T382] 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)
[ 24.797258][ T382] RSP: 002b:00007ffeba1bd588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 24.797653][ T382] RAX: ffffffffffffffda RBX: 00007ffeba1bdcb0 RCX: 00007fe6ac0879a7
[ 24.798032][ T382] RDX: 0000000000000000 RSI: 00007ffeba1bd5f0 RDI: 0000000000000005
[ 24.798411][ T382] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[ 24.798787][ T382] R10: 00007fe6abf45ef8 R11: 0000000000000246 R12: 0000000000000003
Finger prints:
print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain