====================================== | [1064.852743][T15081] #0: ffffffff98df1088 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) | [1064.853016][T15081] #1: ffffffff98ddfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 1064.853323][T15081] | [ 1064.853323][T15081] stack backtrace: [ 1064.853770][T15081] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1064.853959][T15081] Call Trace: [ 1064.854079][T15081] [1064.854160][T15081] dump_stack_lvl (lib/dump_stack.c:123) [1064.854319][T15081] print_deadlock_bug (kernel/locking/lockdep.c:3040) [1064.854497][T15081] validate_chain (kernel/locking/lockdep.c:3894) [1064.854658][T15081] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1064.854811][T15081] ? 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) [1064.854965][T15081] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [1064.855081][T15081] ? 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) [1064.855234][T15081] __lock_acquire (kernel/locking/lockdep.c:5226) [1064.855388][T15081] ? validate_chain (kernel/locking/lockdep.c:3915) [1064.855540][T15081] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [1064.855695][T15081] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [1064.855893][T15081] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1064.856045][T15081] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [1064.856196][T15081] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [1064.856356][T15081] ? lock_acquire (kernel/locking/lockdep.c:5822) [1064.856516][T15081] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [1064.856707][T15081] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [1064.856824][T15081] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [1064.857016][T15081] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [1064.857171][T15081] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [1064.857325][T15081] __dev_open (./include/linux/notifier.h:207 net/core/dev.c:1467) [1064.857442][T15081] ? __pfx___dev_open (net/core/dev.c:1445) [1064.857593][T15081] ? mark_held_locks (kernel/locking/lockdep.c:4321) [1064.857751][T15081] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1064.857943][T15081] __dev_change_flags (net/core/dev.c:8966) [1064.858105][T15081] ? __pfx___dev_change_flags (net/core/dev.c:8930) [1064.858259][T15081] dev_change_flags (net/core/dev.c:9038) [1064.858414][T15081] vlan_device_event (net/8021q/vlan.c:85 net/8021q/vlan.c:470) 8021q [1064.858573][T15081] ? __pfx_nf_tables_netdev_event (net/netfilter/nft_chain_filter.c:357) nf_tables [1064.858797][T15081] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [1064.858989][T15081] ? __pfx_br_device_event (net/bridge/br.c:29) bridge [1064.859219][T15081] ? nft_offload_netdev_event (net/netfilter/nf_tables_offload.c:665) nf_tables [1064.859440][T15081] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [1064.859596][T15081] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [1064.859756][T15081] __dev_notify_flags (net/core/dev.c:9010) [1064.859909][T15081] ? __pfx___dev_notify_flags (net/core/dev.c:8997) [1064.860065][T15081] ? __pfx___dev_change_flags (net/core/dev.c:8930) [1064.860217][T15081] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) [1064.860379][T15081] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [1064.860568][T15081] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1064.860722][T15081] dev_change_flags (net/core/dev.c:9045) [1064.860877][T15081] do_setlink.constprop.0 (net/core/rtnetlink.c:3118) [1064.861033][T15081] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999) [1064.861225][T15081] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [1064.861379][T15081] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [1064.861539][T15081] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921) [1064.861690][T15081] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [1064.861844][T15081] ? __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) [1064.861999][T15081] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [1064.862191][T15081] ? lock_acquire (kernel/locking/lockdep.c:5822) [1064.862344][T15081] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [1064.862496][T15081] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [1064.862657][T15081] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [1064.862810][T15081] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [1064.862963][T15081] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [1064.863117][T15081] ? __create_object (mm/kmemleak.c:766) [1064.863272][T15081] ? __rtnl_newlink (net/core/rtnetlink.c:3871) [1064.863441][T15081] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [1064.863611][T15081] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [1064.863775][T15081] ? find_held_lock (kernel/locking/lockdep.c:5339) [1064.863952][T15081] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [1064.864122][T15081] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [1064.864294][T15081] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [1064.864460][T15081] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [1064.864628][T15081] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [1064.864801][T15081] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [1064.864969][T15081] ? 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) [1064.865145][T15081] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [1064.865272][T15081] ? __lock_acquire (kernel/locking/lockdep.c:5226) [1064.865442][T15081] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [1064.865614][T15081] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [1064.865784][T15081] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [1064.865955][T15081] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [1064.866124][T15081] ? 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) [1064.866301][T15081] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [1064.866485][T15081] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [1064.866652][T15081] ? find_held_lock (kernel/locking/lockdep.c:5339) [1064.866823][T15081] ? __lock_release (kernel/locking/lockdep.c:5525) [1064.866991][T15081] netlink_sendmsg (net/netlink/af_netlink.c:1892) [1064.867160][T15081] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [1064.867329][T15081] ? _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) [1064.867498][T15081] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [1064.867658][T15081] ? __pfx_____sys_sendmsg (net/socket.c:2540) [1064.867812][T15081] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [1064.868006][T15081] ___sys_sendmsg (net/socket.c:2650) [1064.868161][T15081] ? __pfx____sys_sendmsg (net/socket.c:2637) [1064.868316][T15081] ? kasan_save_stack (mm/kasan/common.c:49) [1064.868471][T15081] ? kasan_save_stack (mm/kasan/common.c:48) [1064.868624][T15081] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [1064.868785][T15081] ? __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) [1064.868976][T15081] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [1064.869131][T15081] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1064.869285][T15081] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [1064.869475][T15081] ? __lock_acquire (kernel/locking/lockdep.c:5226) [1064.869633][T15081] ? find_held_lock (kernel/locking/lockdep.c:5339) [1064.869788][T15081] ? __lock_release (kernel/locking/lockdep.c:5525) [1064.869947][T15081] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [1064.870102][T15081] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [1064.870255][T15081] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [1064.870407][T15081] __sys_sendmsg (net/socket.c:2680) [1064.870562][T15081] ? __pfx___sys_sendmsg (net/socket.c:2665) [1064.870715][T15081] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [1064.870910][T15081] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1064.871074][T15081] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1064.871269][T15081] RIP: 0033:0x7f3ad88eb9a7 [ 1064.871436][T15081] 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) [ 1064.871979][T15081] RSP: 002b:00007ffdecb79aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1064.872219][T15081] RAX: ffffffffffffffda RBX: 00007ffdecb7a1e0 RCX: 00007f3ad88eb9a7 [ 1064.872454][T15081] RDX: 0000000000000000 RSI: 00007ffdecb79b10 RDI: 0000000000000005 [ 1064.872692][T15081] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 1064.872920][T15081] R10: 00007f3ad87a94a8 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain