====================================== | [ 12.468614][ T280] #0: ffffffff8aa01dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) | [ 12.468961][ T280] #1: ffffffff8a9f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 12.469333][ T280] | [ 12.469333][ T280] stack backtrace: [ 12.469837][ T280] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.470086][ T280] Call Trace: [ 12.470223][ T280] [ 12.470321][ T280] dump_stack_lvl (lib/dump_stack.c:123) [ 12.470511][ T280] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 12.470700][ T280] validate_chain (kernel/locking/lockdep.c:3894) [ 12.470890][ T280] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.471087][ T280] ? 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) [ 12.471277][ T280] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.471403][ T280] __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.471584][ T280] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.471761][ T280] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.471980][ T280] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.472157][ T280] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 12.472334][ T280] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 12.472519][ T280] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.472738][ T280] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 12.472870][ T280] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.473091][ T280] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 12.473270][ T280] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.473441][ T280] netdev_update_features (net/core/dev.c:10314) [ 12.473620][ T280] ? __pfx_netdev_update_features (net/core/dev.c:10311) [ 12.473838][ T280] br_device_event (net/bridge/br.c:101) [ 12.474007][ T280] ? __pfx_br_device_event (net/bridge/br.c:29) [ 12.474178][ T280] ? packet_notifier (net/packet/af_packet.c:4282) [ 12.474351][ T280] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 12.474527][ T280] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 12.474701][ T280] netdev_change_features (net/core/dev.c:10328) [ 12.474865][ T280] ? __pfx_netdev_change_features (net/core/dev.c:10328) [ 12.475067][ T280] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.475232][ T280] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 12.475357][ T280] bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 12.475530][ T280] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 12.475702][ T280] ? __pfx_bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 12.475917][ T280] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 12.476142][ T280] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 12.476276][ T280] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 kernel/softirq.c:394) [ 12.476507][ T280] bond_enslave (drivers/net/bonding/bond_main.c:2355) [ 12.476690][ T280] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.476866][ T280] ? __pfx_bond_enslave (drivers/net/bonding/bond_main.c:1956) [ 12.477044][ T280] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:774) [ 12.477217][ T280] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 12.477397][ T280] ? __kernel_text_address (kernel/extable.c:79) [ 12.477572][ T280] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [ 12.477751][ T280] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 12.477965][ T280] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.478141][ T280] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2637) [ 12.478318][ T280] ? 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) [ 12.478495][ T280] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 12.478666][ T280] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 12.478885][ T280] do_setlink.constprop.0 (net/core/rtnetlink.c:3116) [ 12.479059][ T280] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2990) [ 12.479272][ T280] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.479440][ T280] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) [ 12.479613][ T280] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3912) [ 12.479786][ T280] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [ 12.479970][ T280] ? __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) [ 12.480149][ T280] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [ 12.480359][ T280] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 12.480528][ T280] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [ 12.480696][ T280] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [ 12.480871][ T280] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 12.481039][ T280] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) [ 12.481207][ T280] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 12.481381][ T280] ? __rtnl_newlink (net/core/rtnetlink.c:3862) [ 12.481551][ T280] rtnl_newlink (net/core/rtnetlink.c:336 net/core/rtnetlink.c:4013) [ 12.481722][ T280] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903) [ 12.481897][ T280] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.482062][ T280] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.482234][ T280] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.482406][ T280] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 12.482587][ T280] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903) [ 12.482758][ T280] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [ 12.482928][ T280] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 12.483095][ T280] ? 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) [ 12.483267][ T280] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.483396][ T280] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.483567][ T280] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 12.483739][ T280] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 12.483920][ T280] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 12.484094][ T280] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 12.484265][ T280] ? 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) [ 12.484434][ T280] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 12.484699][ T280] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 12.484971][ T280] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.485322][ T280] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 12.485499][ T280] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 12.485674][ T280] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 12.485845][ T280] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 12.486018][ T280] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 12.486227][ T280] ___sys_sendmsg (net/socket.c:2650) [ 12.486406][ T280] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 12.486583][ T280] ? kasan_save_stack (mm/kasan/common.c:49) [ 12.486758][ T280] ? kasan_save_stack (mm/kasan/common.c:48) [ 12.486930][ T280] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 12.487106][ T280] ? __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) [ 12.487314][ T280] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 12.487492][ T280] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.487668][ T280] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.488062][ T280] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.488324][ T280] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.488506][ T280] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.488678][ T280] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 12.488848][ T280] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.489020][ T280] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.489192][ T280] __sys_sendmsg (net/socket.c:2680) [ 12.489358][ T280] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 12.489532][ T280] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 12.489748][ T280] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.490014][ T280] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.490225][ T280] RIP: 0033:0x7f3e4d0559a7 [ 12.490409][ T280] 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) [ 12.491018][ T280] RSP: 002b:00007ffc7754f4d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 12.491267][ T280] RAX: ffffffffffffffda RBX: 00007ffc7754fc00 RCX: 00007f3e4d0559a7 [ 12.491521][ T280] RDX: 0000000000000000 RSI: 00007ffc7754f540 RDI: 0000000000000005 [ 12.491776][ T280] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000 [ 12.492222][ T280] R10: 0000000014565910 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain