====================================== | [925.856816][T14234] #0: ffffffff8a3f1088 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) | [925.857150][T14234] #1: ffffffff8a3dfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 925.857532][T14234] | [ 925.857532][T14234] stack backtrace: [ 925.858042][T14234] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 925.858277][T14234] Call Trace: [ 925.858419][T14234] [925.858516][T14234] dump_stack_lvl (lib/dump_stack.c:123) [925.858710][T14234] print_deadlock_bug (kernel/locking/lockdep.c:3040) [925.858907][T14234] validate_chain (kernel/locking/lockdep.c:3894) [925.859095][T14234] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [925.859283][T14234] ? 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) [925.859472][T14234] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [925.859613][T14234] ? 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) [925.859799][T14234] __lock_acquire (kernel/locking/lockdep.c:5226) [925.859986][T14234] ? validate_chain (kernel/locking/lockdep.c:3915) [925.860173][T14234] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [925.860369][T14234] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [925.860603][T14234] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [925.860792][T14234] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [925.860978][T14234] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [925.861168][T14234] ? lock_acquire (kernel/locking/lockdep.c:5822) [925.861353][T14234] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [925.861593][T14234] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [925.861737][T14234] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [925.861970][T14234] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [925.862163][T14234] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [925.862349][T14234] __dev_open (./include/linux/notifier.h:207 net/core/dev.c:1467) [925.862494][T14234] ? __pfx___dev_open (net/core/dev.c:1445) [925.862681][T14234] ? mark_held_locks (kernel/locking/lockdep.c:4321) [925.862866][T14234] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [925.863118][T14234] __dev_change_flags (net/core/dev.c:8966) [925.863306][T14234] ? __pfx___dev_change_flags (net/core/dev.c:8930) [925.863496][T14234] dev_change_flags (net/core/dev.c:9038) [925.863684][T14234] vlan_device_event (net/8021q/vlan.c:85 net/8021q/vlan.c:470) 8021q [925.863917][T14234] ? __pfx_nf_tables_netdev_event (net/netfilter/nft_chain_filter.c:357) nf_tables [925.864189][T14234] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [925.864432][T14234] ? __pfx_br_device_event (net/bridge/br.c:29) bridge [925.864707][T14234] ? nft_offload_netdev_event (net/netfilter/nf_tables_offload.c:665) nf_tables [925.864968][T14234] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [925.865161][T14234] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [925.865351][T14234] __dev_notify_flags (net/core/dev.c:9010) [925.865538][T14234] ? __pfx___dev_notify_flags (net/core/dev.c:8997) [925.865728][T14234] ? __pfx___dev_change_flags (net/core/dev.c:8930) [925.865921][T14234] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [925.866110][T14234] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [925.866345][T14234] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [925.866536][T14234] dev_change_flags (net/core/dev.c:9045) [925.866730][T14234] do_setlink.constprop.0 (net/core/rtnetlink.c:3109) [925.866919][T14234] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2990) [925.867158][T14234] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [925.867346][T14234] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) [925.867532][T14234] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3912) [925.867717][T14234] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [925.867904][T14234] ? __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) [925.868092][T14234] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [925.868321][T14234] ? lock_acquire (kernel/locking/lockdep.c:5822) [925.868513][T14234] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [925.868699][T14234] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [925.868893][T14234] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [925.869082][T14234] ? rtnl_newlink (net/core/rtnetlink.c:328 net/core/rtnetlink.c:4011) [925.869268][T14234] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [925.869457][T14234] ? __create_object (mm/kmemleak.c:766) [925.869646][T14234] ? __rtnl_newlink (net/core/rtnetlink.c:3862) [925.869834][T14234] rtnl_newlink (net/core/rtnetlink.c:336 net/core/rtnetlink.c:4013) [925.870031][T14234] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903) [925.870223][T14234] ? find_held_lock (kernel/locking/lockdep.c:5339) [925.870414][T14234] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [925.870602][T14234] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [925.870791][T14234] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [925.870977][T14234] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3903) [925.871163][T14234] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [925.871355][T14234] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [925.871542][T14234] ? 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) [925.871730][T14234] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [925.871873][T14234] ? __lock_acquire (kernel/locking/lockdep.c:5226) [925.872058][T14234] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [925.872244][T14234] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [925.872430][T14234] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [925.872621][T14234] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [925.872816][T14234] ? 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) [925.873003][T14234] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [925.873188][T14234] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [925.873374][T14234] ? find_held_lock (kernel/locking/lockdep.c:5339) [925.873560][T14234] ? __lock_release (kernel/locking/lockdep.c:5525) [925.873755][T14234] netlink_sendmsg (net/netlink/af_netlink.c:1892) [925.873942][T14234] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [925.874139][T14234] ? _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) [925.874331][T14234] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [925.874519][T14234] ? __pfx_____sys_sendmsg (net/socket.c:2540) [925.874703][T14234] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [925.874938][T14234] ___sys_sendmsg (net/socket.c:2650) [925.875125][T14234] ? __pfx____sys_sendmsg (net/socket.c:2637) [925.875311][T14234] ? kasan_save_stack (mm/kasan/common.c:49) [925.875510][T14234] ? kasan_save_stack (mm/kasan/common.c:48) [925.875698][T14234] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [925.875885][T14234] ? __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) [925.876116][T14234] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [925.876304][T14234] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [925.876494][T14234] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [925.876724][T14234] ? __lock_acquire (kernel/locking/lockdep.c:5226) [925.876919][T14234] ? find_held_lock (kernel/locking/lockdep.c:5339) [925.877108][T14234] ? __lock_release (kernel/locking/lockdep.c:5525) [925.877296][T14234] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [925.877486][T14234] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [925.877671][T14234] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [925.877859][T14234] __sys_sendmsg (net/socket.c:2680) [925.878046][T14234] ? __pfx___sys_sendmsg (net/socket.c:2665) [925.878238][T14234] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [925.878476][T14234] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [925.878664][T14234] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 925.878893][T14234] RIP: 0033:0x7f978c4b39a7 [ 925.879088][T14234] 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) [ 925.879751][T14234] RSP: 002b:00007fff93743558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 925.880037][T14234] RAX: ffffffffffffffda RBX: 00007fff93743c90 RCX: 00007f978c4b39a7 [ 925.880317][T14234] RDX: 0000000000000000 RSI: 00007fff937435c0 RDI: 0000000000000005 [ 925.880597][T14234] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 925.880884][T14234] R10: 00007f978c3714a8 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain