====================================== | [ 130.305765][ T1486] #0: ffffffffa37f1088 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) | [ 130.306211][ T1486] #1: ffffffffa37dfc30 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 130.306700][ T1486] | [ 130.306700][ T1486] stack backtrace: [ 130.307356][ T1486] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.307660][ T1486] Call Trace: [ 130.307843][ T1486] [ 130.307969][ T1486] dump_stack_lvl (lib/dump_stack.c:123) [ 130.308219][ T1486] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 130.308464][ T1486] validate_chain (kernel/locking/lockdep.c:3894) [ 130.308708][ T1486] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 130.308952][ T1486] ? 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) [ 130.309193][ T1486] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 130.309379][ T1486] __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.309628][ T1486] ? find_held_lock (kernel/locking/lockdep.c:5332) [ 130.309872][ T1486] ? stack_depot_save_flags (lib/stackdepot.c:672) [ 130.310119][ T1486] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 130.310369][ T1486] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.310673][ T1486] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.310915][ T1486] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 130.311158][ T1486] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 130.311407][ T1486] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.311709][ T1486] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 130.311893][ T1486] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.312194][ T1486] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 130.312438][ T1486] ? __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) [ 130.312739][ T1486] ? addrconf_ifdown.isra.0 (./include/net/addrconf.h:412 net/ipv6/addrconf.c:4033) [ 130.312982][ T1486] ? addrconf_notify (net/ipv6/addrconf.c:3834) [ 130.313232][ T1486] ? notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 130.313471][ T1486] ? blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 130.313775][ T1486] ? dev_set_mtu_ext (./include/linux/notifier.h:207 net/core/dev.c:9111) [ 130.314021][ T1486] ? rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [ 130.314265][ T1486] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.314514][ T1486] dev_set_mtu_ext (./include/linux/notifier.h:207 net/core/dev.c:9101) [ 130.314762][ T1486] ? __pfx_dev_set_mtu_ext (net/core/dev.c:9087) [ 130.315016][ T1486] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.315261][ T1486] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.315507][ T1486] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 130.315751][ T1486] dev_set_mtu (net/core/dev.c:9130) [ 130.315934][ T1486] ? __pfx_dev_set_mtu (net/core/dev.c:9125) [ 130.316177][ T1486] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.316429][ T1486] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.316678][ T1486] ? nf_tables_netdev_event (./include/net/net_namespace.h:393 ./include/linux/netdevice.h:2639 net/netfilter/nft_chain_filter.c:364) nf_tables [ 130.317037][ T1486] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge [ 130.317406][ T1486] br_device_event (net/bridge/br.c:142) bridge [ 130.317698][ T1486] ? __pfx_br_device_event (net/bridge/br.c:29) bridge [ 130.318052][ T1486] ? nft_offload_netdev_event (net/netfilter/nf_tables_offload.c:665) nf_tables [ 130.318412][ T1486] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 130.318667][ T1486] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 130.318909][ T1486] dev_set_mtu_ext (./include/linux/notifier.h:207 net/core/dev.c:9111) [ 130.319153][ T1486] ? __pfx_dev_set_mtu_ext (net/core/dev.c:9087) [ 130.319395][ T1486] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 130.319697][ T1486] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 130.319942][ T1486] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 130.320129][ T1486] do_setlink.constprop.0 (net/core/rtnetlink.c:3081) [ 130.320390][ T1486] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999) [ 130.320692][ T1486] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 130.320939][ T1486] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 130.321179][ T1486] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921) [ 130.321419][ T1486] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 130.321657][ T1486] ? __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) [ 130.321903][ T1486] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) [ 130.322213][ T1486] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 130.322458][ T1486] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37)) [ 130.322699][ T1486] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735) [ 130.322944][ T1486] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 130.323189][ T1486] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020) [ 130.323429][ T1486] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 130.323678][ T1486] ? __rtnl_newlink (net/core/rtnetlink.c:3871) [ 130.323932][ T1486] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022) [ 130.324336][ T1486] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 130.324565][ T1486] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.324808][ T1486] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.325046][ T1486] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.325406][ T1486] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 130.325645][ T1486] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912) [ 130.325893][ T1486] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 130.326135][ T1486] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 130.326530][ T1486] ? 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) [ 130.326772][ T1486] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 130.326956][ T1486] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.327196][ T1486] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 130.327607][ T1486] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 130.327835][ T1486] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 130.328097][ T1486] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 130.328340][ T1486] ? 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) [ 130.328711][ T1486] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 130.328902][ T1486] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 130.329115][ T1486] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.329357][ T1486] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.329726][ T1486] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 130.329965][ T1486] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 130.330208][ T1486] ? _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) [ 130.330469][ T1486] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 130.330886][ T1486] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 130.331096][ T1486] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 130.331403][ T1486] ___sys_sendmsg (net/socket.c:2650) [ 130.331649][ T1486] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 130.332019][ T1486] ? kasan_save_stack (mm/kasan/common.c:49) [ 130.332262][ T1486] ? kasan_save_stack (mm/kasan/common.c:48) [ 130.332506][ T1486] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 130.332749][ T1486] ? __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) [ 130.333220][ T1486] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 130.333465][ T1486] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 130.333711][ T1486] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 130.334020][ T1486] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.334424][ T1486] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.334667][ T1486] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.334906][ T1486] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 130.335152][ T1486] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.335511][ T1486] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.335755][ T1486] __sys_sendmsg (net/socket.c:2680) [ 130.335998][ T1486] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 130.336247][ T1486] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 130.336713][ T1486] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 130.336955][ T1486] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 130.337251][ T1486] RIP: 0033:0x7f9070fd09a7 [ 130.337505][ T1486] 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) [ 130.338361][ T1486] RSP: 002b:00007ffdbe6930c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 130.338890][ T1486] RAX: ffffffffffffffda RBX: 00007ffdbe693800 RCX: 00007f9070fd09a7 [ 130.339250][ T1486] RDX: 0000000000000000 RSI: 00007ffdbe693130 RDI: 0000000000000005 [ 130.339736][ T1486] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 130.340103][ T1486] R10: 00007f9070e8e4a8 R11: 0000000000000246 R12: 0000000000000003 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain