======================================
| [ 26.918745][ T262] 1 lock held by ip/262:
| [ 26.918881][ T262] #0: ffffffff92fd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645)
| [ 26.919211][ T262]
| [ 26.919211][ T262] stack backtrace:
[ 26.919691][ T262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.920062][ T262] Call Trace:
[ 26.920194][ T262] <TASK>
[ 26.920283][ T262] dump_stack_lvl (lib/dump_stack.c:122)
[ 26.920460][ T262] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725)
[ 26.920630][ T262] ? __pfx_br_handle_frame (net/bridge/br_input.c:326)
[ 26.920805][ T262] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105)
[ 26.921016][ T262] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645)
[ 26.921184][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.921398][ T262] br_add_if (net/bridge/br_if.c:692)
[ 26.921535][ T262] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 26.921686][ T262] ? netdev_master_upper_dev_get (net/core/dev.c:7102)
[ 26.921880][ T262] do_setlink (net/core/rtnetlink.c:2907)
[ 26.922035][ T262] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769)
[ 26.922190][ T262] ? __pfx_do_setlink (net/core/rtnetlink.c:2778)
[ 26.922343][ T262] ? is_bpf_text_address (./kernel/bpf/core.c:772)
[ 26.922496][ T262] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94)
[ 26.922654][ T262] ? __kernel_text_address (kernel/extable.c:79)
[ 26.922808][ T262] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364)
[ 26.922960][ T262] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83)
[ 26.923153][ T262] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26)
[ 26.923320][ T262] ? stack_trace_save (kernel/stacktrace.c:123)
[ 26.923477][ T262] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 26.923637][ T262] ? __pfx_validate_nla (lib/nlattr.c:396)
[ 26.923792][ T262] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3))
[ 26.923915][ T262] ? kasan_save_stack (mm/kasan/common.c:49)
[ 26.924074][ T262] ? __nla_validate_parse (lib/nlattr.c:638)
[ 26.924234][ T262] __rtnl_newlink (net/core/rtnetlink.c:3696)
[ 26.924394][ T262] ? 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:227)
[ 26.924551][ T262] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557)
[ 26.924710][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.924904][ T262] ? __create_object (mm/kmemleak.c:751)
[ 26.925062][ T262] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52))
[ 26.925226][ T262] rtnl_newlink (net/core/rtnetlink.c:3744)
[ 26.925345][ T262] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647)
[ 26.925504][ T262] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541)
[ 26.925660][ T262] ? 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:227)
[ 26.925814][ T262] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3))
[ 26.925936][ T262] ? __lock_acquire (kernel/locking/lockdep.c:5142)
[ 26.926092][ T262] netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[ 26.926247][ T262] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541)
[ 26.926402][ T262] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527)
[ 26.926574][ T262] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340)
[ 26.926729][ T262] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 26.926888][ T262] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357)
[ 26.927047][ T262] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342)
[ 26.927202][ T262] ? find_held_lock (kernel/locking/lockdep.c:5249)
[ 26.927361][ T262] netlink_sendmsg (net/netlink/af_netlink.c:1901)
[ 26.927522][ T262] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820)
[ 26.927677][ T262] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381)
[ 26.927835][ T262] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279)
[ 26.927996][ T262] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597)
[ 26.928155][ T262] ? __pfx_____sys_sendmsg (net/socket.c:2543)
[ 26.928308][ T262] ? __pfx_copy_msghdr_from_user (net/socket.c:2523)
[ 26.928499][ T262] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824)
[ 26.928664][ T262] ___sys_sendmsg (net/socket.c:2653)
[ 26.928822][ T262] ? __pfx____sys_sendmsg (net/socket.c:2640)
[ 26.928981][ T262] ? find_held_lock (kernel/locking/lockdep.c:5249)
[ 26.929137][ T262] ? __lock_release (kernel/locking/lockdep.c:5435)
[ 26.929290][ T262] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001)
[ 26.929483][ T262] ? __pfx___lock_release (kernel/locking/lockdep.c:5411)
[ 26.929640][ T262] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 26.929802][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.929994][ T262] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145)
[ 26.930157][ T262] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682)
[ 26.930312][ T262] ? __pfx___sys_sendmsg (net/socket.c:2668)
[ 26.930464][ T262] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65)
[ 26.930639][ T262] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 26.930796][ T262] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 26.930989][ T262] RIP: 0033:0x7f3a4c9fa7b7
[ 26.931152][ T262] 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)
[ 26.931705][ T262] RSP: 002b:00007ffdf89baf88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 26.931937][ T262] RAX: ffffffffffffffda RBX: 00007ffdf89bb6b0 RCX: 00007f3a4c9fa7b7
[ 26.932166][ T262] RDX: 0000000000000000 RSI: 00007ffdf89baff0 RDI: 0000000000000005
[ 26.932395][ T262] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[ 26.932624][ T262] R10: 0000000030048910 R11: 0000000000000246 R12: 0000000000000004
[ 26.932856][ T262] R13: 0000000066bea340 R14: 0000000000496600 R15: 0000000000000000
| [ 26.935577][ T262] 1 lock held by ip/262:
| [ 26.935698][ T262] #0: ffffffff92fd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645)
| [ 26.935991][ T262]
| [ 26.935991][ T262] stack backtrace:
[ 26.936431][ T262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.936771][ T262] Call Trace:
[ 26.936889][ T262] <TASK>
[ 26.936972][ T262] dump_stack_lvl (lib/dump_stack.c:122)
[ 26.937136][ T262] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725)
[ 26.937292][ T262] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105)
[ 26.937485][ T262] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645)
[ 26.937648][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.937846][ T262] br_add_if (net/bridge/br_if.c:692)
[ 26.937968][ T262] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 26.938122][ T262] ? netdev_master_upper_dev_get (net/core/dev.c:7102)
[ 26.938320][ T262] do_setlink (net/core/rtnetlink.c:2907)
[ 26.938478][ T262] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769)
[ 26.938638][ T262] ? __pfx_do_setlink (net/core/rtnetlink.c:2778)
[ 26.938793][ T262] ? is_bpf_text_address (./kernel/bpf/core.c:772)
[ 26.938947][ T262] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94)
[ 26.939104][ T262] ? __kernel_text_address (kernel/extable.c:79)
[ 26.939258][ T262] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364)
[ 26.939410][ T262] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83)
[ 26.939604][ T262] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26)
[ 26.939776][ T262] ? stack_trace_save (kernel/stacktrace.c:123)
[ 26.939931][ T262] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 26.940087][ T262] ? __pfx_validate_nla (lib/nlattr.c:396)
[ 26.940243][ T262] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3))
[ 26.940367][ T262] ? kasan_save_stack (mm/kasan/common.c:49)
[ 26.940530][ T262] ? __nla_validate_parse (lib/nlattr.c:638)
[ 26.940693][ T262] __rtnl_newlink (net/core/rtnetlink.c:3696)
[ 26.940855][ T262] ? 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:227)
[ 26.941016][ T262] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557)
[ 26.941179][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.941376][ T262] ? __create_object (mm/kmemleak.c:751)
[ 26.941561][ T262] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52))
[ 26.941724][ T262] rtnl_newlink (net/core/rtnetlink.c:3744)
[ 26.941844][ T262] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647)
[ 26.942001][ T262] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541)
[ 26.942154][ T262] ? 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:227)
[ 26.942307][ T262] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3))
[ 26.942435][ T262] ? __lock_acquire (kernel/locking/lockdep.c:5142)
[ 26.942599][ T262] netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[ 26.942757][ T262] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541)
[ 26.942920][ T262] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527)
[ 26.943092][ T262] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340)
[ 26.943248][ T262] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 26.943406][ T262] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357)
[ 26.943568][ T262] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342)
[ 26.943726][ T262] ? find_held_lock (kernel/locking/lockdep.c:5249)
[ 26.943886][ T262] netlink_sendmsg (net/netlink/af_netlink.c:1901)
[ 26.944047][ T262] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820)
[ 26.944200][ T262] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381)
[ 26.944358][ T262] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279)
[ 26.944521][ T262] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597)
[ 26.944684][ T262] ? __pfx_____sys_sendmsg (net/socket.c:2543)
[ 26.944836][ T262] ? __pfx_copy_msghdr_from_user (net/socket.c:2523)
[ 26.945030][ T262] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824)
[ 26.945197][ T262] ___sys_sendmsg (net/socket.c:2653)
[ 26.945355][ T262] ? __pfx____sys_sendmsg (net/socket.c:2640)
[ 26.945511][ T262] ? find_held_lock (kernel/locking/lockdep.c:5249)
[ 26.945670][ T262] ? __lock_release (kernel/locking/lockdep.c:5435)
[ 26.945826][ T262] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001)
[ 26.946020][ T262] ? __pfx___lock_release (kernel/locking/lockdep.c:5411)
[ 26.946177][ T262] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 26.946342][ T262] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358)
[ 26.946543][ T262] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145)
[ 26.946712][ T262] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682)
[ 26.946866][ T262] ? __pfx___sys_sendmsg (net/socket.c:2668)
[ 26.947017][ T262] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65)
[ 26.947192][ T262] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 26.947349][ T262] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 26.947546][ T262] RIP: 0033:0x7f3a4c9fa7b7
[ 26.947709][ T262] 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)
[ 26.948248][ T262] RSP: 002b:00007ffdf89baf88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 26.948481][ T262] RAX: ffffffffffffffda RBX: 00007ffdf89bb6b0 RCX: 00007f3a4c9fa7b7
[ 26.948725][ T262] RDX: 0000000000000000 RSI: 00007ffdf89baff0 RDI: 0000000000000005
[ 26.948959][ T262] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[ 26.949193][ T262] R10: 0000000030048910 R11: 0000000000000246 R12: 0000000000000004
Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_add_if:do_setlink