====================================== | [ 13.483621][ T279] #0: ffffffffae401dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) | [ 13.483925][ T279] #1: ffffffffae3f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 13.484261][ T279] | [ 13.484261][ T279] stack backtrace: [ 13.484723][ T279] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.484934][ T279] Call Trace: [ 13.485063][ T279] [ 13.485160][ T279] dump_stack_lvl (lib/dump_stack.c:123) [ 13.485357][ T279] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 13.485527][ T279] validate_chain (kernel/locking/lockdep.c:3894) [ 13.485691][ T279] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 13.485863][ T279] ? 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) [ 13.486042][ T279] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 13.486175][ T279] __lock_acquire (kernel/locking/lockdep.c:5226) [ 13.486360][ T279] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 13.486539][ T279] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 13.486806][ T279] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 13.486994][ T279] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 13.487166][ T279] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 13.487346][ T279] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 13.487575][ T279] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 13.487715][ T279] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 13.487931][ T279] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 13.488117][ T279] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 13.488308][ T279] netdev_update_features (net/core/dev.c:10314) [ 13.488493][ T279] ? __pfx_netdev_update_features (net/core/dev.c:10311) [ 13.488747][ T279] br_device_event (net/bridge/br.c:101) [ 13.488934][ T279] ? __pfx_br_device_event (net/bridge/br.c:29) [ 13.489108][ T279] ? packet_notifier (net/packet/af_packet.c:4282) [ 13.489321][ T279] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 13.489514][ T279] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 13.489708][ T279] netdev_change_features (net/core/dev.c:10328) [ 13.489885][ T279] ? __pfx_netdev_change_features (net/core/dev.c:10328) [ 13.490093][ T279] ? __lock_release (kernel/locking/lockdep.c:5525) [ 13.490270][ T279] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 13.490397][ T279] bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 13.490566][ T279] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 13.490736][ T279] ? __pfx_bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 13.490945][ T279] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 13.491133][ T279] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 13.491255][ T279] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 kernel/softirq.c:394) [ 13.491415][ T279] bond_enslave (drivers/net/bonding/bond_main.c:2355) [ 13.491578][ T279] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 13.491738][ T279] ? __pfx_bond_enslave (drivers/net/bonding/bond_main.c:1956) [ 13.491894][ T279] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:774) [ 13.492149][ T279] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 13.492307][ T279] ? __kernel_text_address (kernel/extable.c:79) [ 13.492460][ T279] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [ 13.492611][ T279] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 13.492891][ T279] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 13.493039][ T279] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2646) [ 13.493194][ T279] ? 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.h:47 kernel/locking/mutex.c:66) [ 13.493345][ T279] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 13.493585][ T279] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 13.493773][ T279] do_setlink.constprop.0 (net/core/rtnetlink.c:3125) [ 13.493929][ T279] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999) [ 13.494199][ T279] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 13.494348][ T279] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 13.494500][ T279] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921) [ 13.494647][ T279] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 13.494901][ T279] ? __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) [ 13.495052][ T279] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [ 13.495239][ T279] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 13.495388][ T279] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [ 13.495541][ T279] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [ 13.495695][ T279] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 13.495848][ T279] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 13.495999][ T279] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 13.496239][ T279] ? __rtnl_newlink (net/core/rtnetlink.c:3871) [ 13.496387][ T279] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [ 13.496538][ T279] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 13.496696][ T279] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 13.496952][ T279] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 13.497110][ T279] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 13.497259][ T279] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 13.497410][ T279] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 13.497662][ T279] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 13.497825][ T279] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 13.497993][ T279] ? 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) [ 13.498165][ T279] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 13.498384][ T279] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 13.498547][ T279] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 13.498714][ T279] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 13.498889][ T279] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 13.499152][ T279] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 13.499318][ T279] ? 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) [ 13.499494][ T279] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 13.499672][ T279] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 13.499922][ T279] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 13.500073][ T279] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 13.500233][ T279] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 13.500401][ T279] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 13.500641][ T279] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 13.500803][ T279] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 13.501007][ T279] ___sys_sendmsg (net/socket.c:2650) [ 13.501166][ T279] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 13.501419][ T279] ? kasan_save_stack (mm/kasan/common.c:49) [ 13.501570][ T279] ? kasan_save_stack (mm/kasan/common.c:48) [ 13.501727][ T279] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 13.501884][ T279] ? __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) [ 13.502172][ T279] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 13.502323][ T279] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 13.502488][ T279] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 13.502778][ T279] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 13.502931][ T279] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 13.503091][ T279] ? __lock_release (kernel/locking/lockdep.c:5525) [ 13.503247][ T279] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 13.503414][ T279] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 13.503562][ T279] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 13.503717][ T279] __sys_sendmsg (net/socket.c:2680) [ 13.503882][ T279] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 13.504043][ T279] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 13.504251][ T279] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 13.504407][ T279] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 13.504605][ T279] RIP: 0033:0x7fa2b02de9a7 [ 13.504870][ T279] 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) [ 13.505423][ T279] RSP: 002b:00007ffc2be79128 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 13.505671][ T279] RAX: ffffffffffffffda RBX: 00007ffc2be79850 RCX: 00007fa2b02de9a7 [ 13.505899][ T279] RDX: 0000000000000000 RSI: 00007ffc2be79190 RDI: 0000000000000005 [ 13.506217][ T279] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000 [ 13.506456][ T279] R10: 0000000014e24910 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain