====================================== | [ 12.085225][ T278] #0: ffffffffb0c01dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) | [ 12.085493][ T278] #1: ffffffffb0bf0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 12.085798][ T278] | [ 12.085798][ T278] stack backtrace: [ 12.086215][ T278] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.086403][ T278] Call Trace: [ 12.086520][ T278] [ 12.086599][ T278] dump_stack_lvl (lib/dump_stack.c:123) [ 12.086760][ T278] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 12.086915][ T278] validate_chain (kernel/locking/lockdep.c:3894) [ 12.087070][ T278] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.087223][ T278] ? 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) [ 12.087374][ T278] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.087492][ T278] __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.087646][ T278] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.087795][ T278] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.087985][ T278] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.088140][ T278] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 12.088292][ T278] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 12.088446][ T278] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.088634][ T278] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 12.088750][ T278] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.088963][ T278] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 12.089117][ T278] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.089357][ T278] netdev_update_features (net/core/dev.c:10314) [ 12.089511][ T278] ? __pfx_netdev_update_features (net/core/dev.c:10311) [ 12.089706][ T278] br_device_event (net/bridge/br.c:101) [ 12.089946][ T278] ? __pfx_br_device_event (net/bridge/br.c:29) [ 12.090099][ T278] ? packet_notifier (net/packet/af_packet.c:4282) [ 12.090337][ T278] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 12.090490][ T278] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 12.090731][ T278] netdev_change_features (net/core/dev.c:10328) [ 12.090969][ T278] ? __pfx_netdev_change_features (net/core/dev.c:10328) [ 12.091154][ T278] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.091304][ T278] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 12.091418][ T278] bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 12.091573][ T278] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 12.091725][ T278] ? __pfx_bond_compute_features (drivers/net/bonding/bond_main.c:1548) [ 12.091998][ T278] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 12.092188][ T278] ? dev_mc_add (net/core/dev_addr_lists.c:887) [ 12.092304][ T278] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 kernel/softirq.c:394) [ 12.092462][ T278] bond_enslave (drivers/net/bonding/bond_main.c:2355) [ 12.092623][ T278] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.092776][ T278] ? __pfx_bond_enslave (drivers/net/bonding/bond_main.c:1956) [ 12.093015][ T278] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:774) [ 12.093167][ T278] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 12.093320][ T278] ? __kernel_text_address (kernel/extable.c:79) [ 12.093530][ T278] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [ 12.093978][ T278] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 12.094183][ T278] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.094338][ T278] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2646) [ 12.094578][ T278] ? 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) [ 12.094729][ T278] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 12.094875][ T278] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 12.095067][ T278] do_setlink.constprop.0 (net/core/rtnetlink.c:3125) [ 12.095307][ T278] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999) [ 12.095494][ T278] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.095646][ T278] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 12.095796][ T278] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921) [ 12.096031][ T278] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 12.096244][ T278] ? __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) [ 12.096428][ T278] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [ 12.096619][ T278] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 12.096860][ T278] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [ 12.097021][ T278] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [ 12.097182][ T278] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 12.097340][ T278] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 12.097578][ T278] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 12.097823][ T278] ? __rtnl_newlink (net/core/rtnetlink.c:3871) [ 12.097974][ T278] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [ 12.098135][ T278] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 12.098291][ T278] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.098443][ T278] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.098596][ T278] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.098750][ T278] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 12.098902][ T278] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 12.099063][ T278] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 12.099224][ T278] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 12.099383][ T278] ? 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) [ 12.099533][ T278] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.099650][ T278] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.099803][ T278] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 12.099956][ T278] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 12.100121][ T278] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 12.100331][ T278] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 12.100559][ T278] ? 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) [ 12.100927][ T278] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 12.101160][ T278] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 12.101387][ T278] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.101618][ T278] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 12.101854][ T278] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 12.102096][ T278] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 12.102337][ T278] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 12.102583][ T278] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 12.102885][ T278] ___sys_sendmsg (net/socket.c:2650) [ 12.103276][ T278] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 12.103524][ T278] ? kasan_save_stack (mm/kasan/common.c:49) [ 12.103761][ T278] ? kasan_save_stack (mm/kasan/common.c:48) [ 12.103997][ T278] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 12.104388][ T278] ? __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) [ 12.104685][ T278] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 12.104892][ T278] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.105158][ T278] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.105348][ T278] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.105500][ T278] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.105650][ T278] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.105885][ T278] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 12.106047][ T278] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.106223][ T278] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.106377][ T278] __sys_sendmsg (net/socket.c:2680) [ 12.106614][ T278] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 12.106765][ T278] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 12.106953][ T278] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.107110][ T278] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.107405][ T278] RIP: 0033:0x7f4812e4f9a7 [ 12.107563][ T278] 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) [ 12.108190][ T278] RSP: 002b:00007fffb5930dc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 12.108416][ T278] RAX: ffffffffffffffda RBX: 00007fffb59314f0 RCX: 00007f4812e4f9a7 [ 12.108747][ T278] RDX: 0000000000000000 RSI: 00007fffb5930e30 RDI: 0000000000000005 [ 12.108969][ T278] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000 [ 12.109205][ T278] R10: 000000000bb85910 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain