======================================
| [ 28.629354][ T445] #0: ffffffff9f7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020)
| [ 28.629665][ T445] #1: ffffffff9f7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [ 28.630000][ T445]
| [ 28.630000][ T445] stack backtrace:
[ 28.630460][ T445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.630676][ T445] Call Trace:
[ 28.630806][ T445] <TASK>
[ 28.630892][ T445] dump_stack_lvl (lib/dump_stack.c:123)
[ 28.631062][ T445] print_deadlock_bug (kernel/locking/lockdep.c:3040)
[ 28.631244][ T445] validate_chain (kernel/locking/lockdep.c:3894)
[ 28.631410][ T445] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 28.631579][ T445] ? 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)
[ 28.631745][ T445] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 28.631871][ T445] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 28.632039][ T445] ? validate_chain (kernel/locking/lockdep.c:3798 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872)
[ 28.632223][ T445] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 28.632391][ T445] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 28.632601][ T445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 28.632766][ T445] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 28.632928][ T445] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 28.633097][ T445] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 28.633310][ T445] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526)
[ 28.633437][ T445] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 28.633643][ T445] ? __pfx_down_read (kernel/locking/rwsem.c:1522)
[ 28.633805][ T445] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 28.633972][ T445] dev_set_mtu_ext (./include/linux/notifier.h:207 net/core/dev.c:9101)
[ 28.634143][ T445] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 28.634312][ T445] ? __pfx_dev_set_mtu_ext (net/core/dev.c:9087)
[ 28.634479][ T445] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 28.634646][ T445] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 28.634818][ T445] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 28.634948][ T445] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 28.635120][ T445] dev_set_mtu (net/core/dev.c:9130)
[ 28.635256][ T445] ? __pfx_dev_set_mtu (net/core/dev.c:9125)
[ 28.635423][ T445] ? __timer_delete_sync (kernel/time/timer.c:1668 (discriminator 34))
[ 28.635588][ T445] vlan_device_event (net/8021q/vlan.c:424) 8021q
[ 28.635759][ T445] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q
[ 28.635966][ T445] ? packet_notifier (net/packet/af_packet.c:4282)
[ 28.636147][ T445] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 28.636320][ T445] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 28.636484][ T445] dev_set_mtu_ext (./include/linux/notifier.h:207 net/core/dev.c:9111)
[ 28.636660][ T445] ? __pfx_dev_set_mtu_ext (net/core/dev.c:9087)
[ 28.636819][ T445] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83)
[ 28.637015][ T445] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 28.637187][ T445] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 28.637317][ T445] do_setlink.constprop.0 (net/core/rtnetlink.c:3081)
[ 28.637481][ T445] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:2999)
[ 28.637683][ T445] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 28.637846][ T445] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020)
[ 28.638008][ T445] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3921)
[ 28.638179][ T445] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6911)
[ 28.638343][ T445] ? __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)
[ 28.638513][ T445] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79)
[ 28.638717][ T445] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 28.638879][ T445] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 37))
[ 28.639042][ T445] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:735)
[ 28.639215][ T445] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 28.639386][ T445] ? rtnl_newlink (net/core/rtnetlink.c:337 net/core/rtnetlink.c:4020)
[ 28.639548][ T445] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 28.639722][ T445] ? __rtnl_newlink (net/core/rtnetlink.c:3871)
[ 28.639887][ T445] rtnl_newlink (net/core/rtnetlink.c:345 net/core/rtnetlink.c:4022)
[ 28.640054][ T445] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912)
[ 28.640237][ T445] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 28.640402][ T445] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 28.640564][ T445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 28.640727][ T445] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909)
[ 28.640895][ T445] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3912)
[ 28.641059][ T445] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911)
[ 28.641236][ T445] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814)
[ 28.641400][ T445] ? 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)
[ 28.641558][ T445] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 28.641682][ T445] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 28.641846][ T445] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 28.642009][ T445] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814)
[ 28.642184][ T445] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 28.642349][ T445] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 28.642513][ T445] ? 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)
[ 28.642678][ T445] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 28.642838][ T445] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 28.642999][ T445] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 28.643170][ T445] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 28.643339][ T445] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 28.643502][ T445] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594)
[ 28.643666][ T445] ? __pfx_____sys_sendmsg (net/socket.c:2540)
[ 28.643826][ T445] ? __pfx_copy_msghdr_from_user (net/socket.c:2520)
[ 28.644034][ T445] ___sys_sendmsg (net/socket.c:2650)
[ 28.644208][ T445] ? __pfx____sys_sendmsg (net/socket.c:2637)
[ 28.644370][ T445] ? kasan_save_stack (mm/kasan/common.c:49)
[ 28.644538][ T445] ? kasan_save_stack (mm/kasan/common.c:48)
[ 28.644698][ T445] ? __kasan_record_aux_stack (mm/kasan/generic.c:544)
[ 28.644862][ T445] ? __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)
[ 28.645064][ T445] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539)
[ 28.645231][ T445] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 28.645394][ T445] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 28.645598][ T445] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 28.645773][ T445] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 28.645935][ T445] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 28.646098][ T445] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65)
[ 28.646268][ T445] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 28.646432][ T445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 28.646600][ T445] __sys_sendmsg (net/socket.c:2680)
[ 28.646751][ T445] ? __pfx___sys_sendmsg (net/socket.c:2665)
[ 28.646907][ T445] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643)
[ 28.647100][ T445] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 28.647258][ T445] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 28.647444][ T445] RIP: 0033:0x7fdf8ee899a7
[ 28.647601][ T445] 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)
[ 28.648127][ T445] RSP: 002b:00007fff21cfb968 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 28.648360][ T445] RAX: ffffffffffffffda RBX: 00007fff21cfc090 RCX: 00007fdf8ee899a7
[ 28.648585][ T445] RDX: 0000000000000000 RSI: 00007fff21cfb9d0 RDI: 0000000000000005
[ 28.648813][ T445] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[ 28.649044][ T445] R10: 00007fdf8ed47ef8 R11: 0000000000000246 R12: 0000000000000004
Finger prints:
print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain