====================================== | [ 89.816126][ T1011] #0: ffffffffa79f1088 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) | [ 89.816410][ T1011] #1: ffffffffa79dfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 89.816741][ T1011] | [ 89.816741][ T1011] stack backtrace: [ 89.817182][ T1011] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 89.817430][ T1011] Call Trace: [ 89.817557][ T1011] [ 89.817643][ T1011] dump_stack_lvl (lib/dump_stack.c:123) [ 89.817821][ T1011] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 89.817983][ T1011] validate_chain (kernel/locking/lockdep.c:3894) [ 89.818152][ T1011] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 89.818317][ T1011] ? 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) [ 89.818482][ T1011] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 89.818603][ T1011] ? add_lock_to_list (./arch/x86/include/asm/bitops.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:29 kernel/locking/lockdep.c:1413 kernel/locking/lockdep.c:1430) [ 89.818775][ T1011] __lock_acquire (kernel/locking/lockdep.c:5226) [ 89.818963][ T1011] ? validate_chain (kernel/locking/lockdep.c:3915) [ 89.819122][ T1011] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 89.819282][ T1011] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 89.819485][ T1011] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 89.819649][ T1011] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 89.819816][ T1011] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 89.819974][ T1011] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 89.820131][ T1011] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 89.820327][ T1011] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 89.820452][ T1011] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 89.820649][ T1011] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 89.820850][ T1011] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 89.821014][ T1011] __dev_open (./include/linux/notifier.h:207 net/core/dev.c:1467) [ 89.821138][ T1011] ? __pfx___dev_open (net/core/dev.c:1445) [ 89.821300][ T1011] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 89.821458][ T1011] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 89.821663][ T1011] __dev_change_flags (net/core/dev.c:8966) [ 89.821835][ T1011] ? __pfx___dev_change_flags (net/core/dev.c:8930) [ 89.821999][ T1011] dev_change_flags (net/core/dev.c:9038) [ 89.822160][ T1011] vlan_device_event (net/8021q/vlan.c:85 net/8021q/vlan.c:470) 8021q [ 89.822328][ T1011] ? __pfx_nf_tables_netdev_event (net/netfilter/nft_chain_filter.c:357) nf_tables [ 89.822554][ T1011] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 89.822768][ T1011] ? nft_offload_netdev_event (net/netfilter/nf_tables_offload.c:665) nf_tables [ 89.823003][ T1011] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 89.823164][ T1011] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 89.823324][ T1011] __dev_notify_flags (net/core/dev.c:9010) [ 89.823485][ T1011] ? __pfx___dev_notify_flags (net/core/dev.c:8997) [ 89.823646][ T1011] ? __pfx___dev_change_flags (net/core/dev.c:8930) [ 89.823816][ T1011] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [ 89.823976][ T1011] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 89.824183][ T1011] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 89.824343][ T1011] dev_change_flags (net/core/dev.c:9045) [ 89.824547][ T1011] do_setlink.constprop.0 (net/core/rtnetlink.c:3118) [ 89.824717][ T1011] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999) [ 89.824916][ T1011] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 89.825070][ T1011] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 89.825235][ T1011] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921) [ 89.825394][ T1011] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 89.825556][ T1011] ? __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) [ 89.825743][ T1011] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [ 89.825947][ T1011] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 89.826110][ T1011] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [ 89.826271][ T1011] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [ 89.826433][ T1011] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 89.826594][ T1011] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 89.826763][ T1011] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 89.826923][ T1011] ? __create_object (mm/kmemleak.c:766) [ 89.827087][ T1011] ? __rtnl_newlink (net/core/rtnetlink.c:3871) [ 89.827248][ T1011] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [ 89.827409][ T1011] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 89.827566][ T1011] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 89.827738][ T1011] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 89.827896][ T1011] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 89.828055][ T1011] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 89.828218][ T1011] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 89.828376][ T1011] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 89.828536][ T1011] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 89.828695][ T1011] ? 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) [ 89.828872][ T1011] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 89.828994][ T1011] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 89.829153][ T1011] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 89.829314][ T1011] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 89.829471][ T1011] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 89.829629][ T1011] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 89.829786][ T1011] ? 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) [ 89.829952][ T1011] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 89.830108][ T1011] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 89.830264][ T1011] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 89.830419][ T1011] ? __lock_release (kernel/locking/lockdep.c:5525) [ 89.830599][ T1011] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 89.830799][ T1011] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 89.830958][ T1011] ? _copy_from_user (./arch/x86/include/asm/smap.h:33 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) [ 89.831117][ T1011] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 89.831283][ T1011] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 89.831442][ T1011] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 89.831640][ T1011] ___sys_sendmsg (net/socket.c:2650) [ 89.831811][ T1011] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 89.831968][ T1011] ? kasan_save_stack (mm/kasan/common.c:49) [ 89.832155][ T1011] ? kasan_save_stack (mm/kasan/common.c:48) [ 89.832346][ T1011] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 89.832554][ T1011] ? __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) [ 89.832804][ T1011] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 89.832990][ T1011] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 89.833227][ T1011] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 89.833541][ T1011] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 89.833791][ T1011] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 89.834039][ T1011] ? __lock_release (kernel/locking/lockdep.c:5525) [ 89.834273][ T1011] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 89.834525][ T1011] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 89.834768][ T1011] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 89.835008][ T1011] __sys_sendmsg (net/socket.c:2680) [ 89.835261][ T1011] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 89.835519][ T1011] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 89.835833][ T1011] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 89.836100][ T1011] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 89.836408][ T1011] RIP: 0033:0x7f6080bbe9a7 [ 89.836668][ T1011] 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) [ 89.837540][ T1011] RSP: 002b:00007ffc95f8e448 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 89.837920][ T1011] RAX: ffffffffffffffda RBX: 00007ffc95f8eb80 RCX: 00007f6080bbe9a7 [ 89.838287][ T1011] RDX: 0000000000000000 RSI: 00007ffc95f8e4b0 RDI: 0000000000000005 [ 89.838655][ T1011] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 89.839039][ T1011] R10: 00007f6080a7c4a8 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain