====================================== | [ 25.163056][ T240] 1 lock held by connect_ipv6/240: | [ 25.163210][ T240] #0: ffff888006219098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) | [ 25.163514][ T240] | [ 25.163514][ T240] stack backtrace: [ 25.163947][ T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 25.164284][ T240] Call Trace: [ 25.164399][ T240] [ 25.164479][ T240] dump_stack_lvl (lib/dump_stack.c:123) [ 25.164631][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 25.164781][ T240] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) [ 25.164930][ T240] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 25.165082][ T240] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) [ 25.165262][ T240] ? stack_depot_save_flags (lib/stackdepot.c:664) [ 25.165413][ T240] ? kasan_save_stack (mm/kasan/common.c:48) [ 25.165560][ T240] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 25.165704][ T240] ? kfree (mm/slub.c:4579 mm/slub.c:4727) [ 25.165814][ T240] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) [ 25.165989][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 25.166149][ T240] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) [ 25.166296][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 25.166445][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) [ 25.166588][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 25.166736][ T240] ? 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) [ 25.166883][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 25.167004][ T240] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 25.167148][ T240] do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 25.167295][ T240] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) [ 25.167442][ T240] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) [ 25.167603][ T240] ? release_sock (net/core/sock.c:3630) [ 25.167748][ T240] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) [ 25.167890][ T240] ? release_sock (net/core/sock.c:3630) [ 25.168038][ T240] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 25.168183][ T240] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 25.168327][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 25.168473][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 25.168616][ T240] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 25.168763][ T240] ? 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) [ 25.168906][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 25.169022][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 25.169178][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 25.169327][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) [ 25.169470][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 25.169614][ T240] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) [ 25.169756][ T240] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 25.169903][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 25.170049][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 25.170192][ T240] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 25.170337][ T240] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) [ 25.170485][ T240] do_sock_getsockopt (net/socket.c:2396) [ 25.170654][ T240] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) [ 25.170799][ T240] ? __pfx_do_sock_getsockopt (net/socket.c:2374) [ 25.170950][ T240] ? fdget (fs/file.c:1121 fs/file.c:1128) [ 25.171063][ T240] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) [ 25.171213][ T240] ? __pfx___sys_getsockopt (net/socket.c:2415) [ 25.171361][ T240] ? __pfx_task_work_run (kernel/task_work.c:207) [ 25.171507][ T240] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) [ 25.171656][ T240] __x64_sys_getsockopt (net/socket.c:2432) [ 25.171799][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 25.171978][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 25.172125][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 25.172306][ T240] RIP: 0033:0x7f256adbe46e [ 25.172456][ T240] Code: 1f 44 00 00 48 8b 15 91 99 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb b8 0f 1f 44 00 00 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 59 All code ======== 0: 1f (bad) 1: 44 00 00 add %r8b,(%rax) 4: 48 8b 15 91 99 0a 00 mov 0xa9991(%rip),%rdx # 0xa999c b: f7 d8 neg %eax d: 64 89 02 mov %eax,%fs:(%rdx) 10: b8 ff ff ff ff mov $0xffffffff,%eax 15: eb b8 jmp 0xffffffffffffffcf 17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1c: f3 0f 1e fa endbr64 20: 49 89 ca mov %rcx,%r10 23: b8 37 00 00 00 mov $0x37,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 0a ja 0x3c 32: c3 ret 33: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 3a: 00 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 15 .byte 0x15 3f: 59 pop %rcx Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 0a ja 0x12 8: c3 ret 9: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 10: 00 00 12: 48 rex.W 13: 8b .byte 0x8b 14: 15 .byte 0x15 15: 59 pop %rcx [ 25.172957][ T240] RSP: 002b:00007f256a469a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 25.173178][ T240] RAX: ffffffffffffffda RBX: 00007f256a469ce0 RCX: 00007f256adbe46e [ 25.173399][ T240] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 000000000000000b [ 25.173614][ T240] RBP: 00007f256a469a40 R08: 00007f256a469a3c R09: 0000000000000064 [ 25.173831][ T240] R10: 00007f256a469a40 R11: 0000000000000246 R12: 000000000000000b [ 25.174048][ T240] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064 | [ 25.177349][ T240] 1 lock held by connect_ipv6/240: | [ 25.177496][ T240] #0: ffff888006219098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) | [ 25.177767][ T240] | [ 25.177767][ T240] stack backtrace: [ 25.178202][ T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 25.178527][ T240] Call Trace: [ 25.178640][ T240] [ 25.178720][ T240] dump_stack_lvl (lib/dump_stack.c:123) [ 25.178872][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 25.179022][ T240] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) [ 25.179174][ T240] tcp_ao_do_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222) [ 25.179320][ T240] tcp_connect (net/ipv4/tcp_output.c:4114) [ 25.179473][ T240] ? rt6_get_cookie (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/ip6_fib.h:312) [ 25.179633][ T240] tcp_v6_connect (net/ipv6/tcp_ipv6.c:333) [ 25.179789][ T240] ? __pfx_tcp_v6_connect (net/ipv6/tcp_ipv6.c:137) [ 25.179936][ T240] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) [ 25.180083][ T240] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 25.180239][ T240] ? 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) [ 25.180386][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 25.180513][ T240] __inet_stream_connect (net/ipv4/af_inet.c:677) [ 25.180661][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 25.180852][ T240] inet_stream_connect (net/ipv4/af_inet.c:749) [ 25.181002][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) [ 25.181151][ T240] ? __pfx___sys_connect (net/socket.c:2078) [ 25.181296][ T240] ? do_fcntl (fs/fcntl.c:473) [ 25.181413][ T240] ? __fget_files (fs/file.c:1009) [ 25.181572][ T240] __x64_sys_connect (net/socket.c:2095) [ 25.181721][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 25.181871][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 25.182056][ T240] RIP: 0033:0x7f256adbe40b [ 25.182212][ T240] Code: 83 ec 18 89 54 24 0c 48 89 34 24 89 7c 24 08 e8 eb c7 f4 ff 8b 54 24 0c 48 8b 34 24 41 89 c0 8b 7c 24 08 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 08 e8 41 c8 f4 ff 8b 44 All code ======== 0: 83 ec 18 sub $0x18,%esp 3: 89 54 24 0c mov %edx,0xc(%rsp) 7: 48 89 34 24 mov %rsi,(%rsp) b: 89 7c 24 08 mov %edi,0x8(%rsp) f: e8 eb c7 f4 ff call 0xfffffffffff4c7ff 14: 8b 54 24 0c mov 0xc(%rsp),%edx 18: 48 8b 34 24 mov (%rsp),%rsi 1c: 41 89 c0 mov %eax,%r8d 1f: 8b 7c 24 08 mov 0x8(%rsp),%edi 23: b8 2a 00 00 00 mov $0x2a,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 35 ja 0x67 32: 44 89 c7 mov %r8d,%edi 35: 89 44 24 08 mov %eax,0x8(%rsp) 39: e8 41 c8 f4 ff call 0xfffffffffff4c87f 3e: 8b .byte 0x8b 3f: 44 rex.R Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 35 ja 0x3d 8: 44 89 c7 mov %r8d,%edi b: 89 44 24 08 mov %eax,0x8(%rsp) f: e8 41 c8 f4 ff call 0xfffffffffff4c855 14: 8b .byte 0x8b 15: 44 rex.R [ 25.182727][ T240] RSP: 002b:00007f256a469b70 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 25.182949][ T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f256adbe40b [ 25.183174][ T240] RDX: 000000000000001c RSI: 00007f256a469ce0 RDI: 000000000000000b [ 25.183395][ T240] RBP: 000000000000000b R08: 0000000000000000 R09: 00000000004133c0 [ 25.183614][ T240] R10: 00007f256ac76598 R11: 0000000000000293 R12: 000000000040cd28 [ 25.183832][ T240] R13: 0000000000000005 R14: 00007f256a469ce0 R15: 0000000000000000 | [ 25.189493][ T240] 1 lock held by connect_ipv6/240: | [ 25.189643][ T240] #0: ffff888006219098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) | [ 25.189917][ T240] | [ 25.189917][ T240] stack backtrace: [ 25.190364][ T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 25.190699][ T240] Call Trace: [ 25.190814][ T240] [ 25.190895][ T240] dump_stack_lvl (lib/dump_stack.c:123) [ 25.191049][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 25.191206][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) [ 25.191359][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) [ 25.191511][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) [ 25.191695][ T240] ? 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) [ 25.191849][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 25.191969][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) [ 25.192155][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 25.192340][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [ 25.192492][ T240] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:395 (discriminator 4) kernel/time/timekeeping.c:403 (discriminator 4) kernel/time/timekeeping.c:850 (discriminator 4)) [ 25.192615][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) [ 25.192765][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) [ 25.192913][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) [ 25.193064][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) [ 25.193248][ T240] ? 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) [ 25.193398][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 25.193517][ T240] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) [ 25.193669][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 25.193857][ T240] __release_sock (net/core/sock.c:3079) [ 25.194013][ T240] release_sock (net/core/sock.c:3633) [ 25.194163][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) [ 25.194315][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) [ 25.194467][ T240] ? __pfx___sys_connect (net/socket.c:2078) [ 25.194617][ T240] ? do_fcntl (fs/fcntl.c:473) [ 25.194736][ T240] ? __fget_files (fs/file.c:1009) [ 25.194897][ T240] __x64_sys_connect (net/socket.c:2095) [ 25.195052][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 25.195207][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 25.195393][ T240] RIP: 0033:0x7f256adbe40b [ 25.195552][ T240] Code: 83 ec 18 89 54 24 0c 48 89 34 24 89 7c 24 08 e8 eb c7 f4 ff 8b 54 24 0c 48 8b 34 24 41 89 c0 8b 7c 24 08 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 08 e8 41 c8 f4 ff 8b 44 All code ======== 0: 83 ec 18 sub $0x18,%esp 3: 89 54 24 0c mov %edx,0xc(%rsp) 7: 48 89 34 24 mov %rsi,(%rsp) b: 89 7c 24 08 mov %edi,0x8(%rsp) f: e8 eb c7 f4 ff call 0xfffffffffff4c7ff 14: 8b 54 24 0c mov 0xc(%rsp),%edx 18: 48 8b 34 24 mov (%rsp),%rsi 1c: 41 89 c0 mov %eax,%r8d 1f: 8b 7c 24 08 mov 0x8(%rsp),%edi 23: b8 2a 00 00 00 mov $0x2a,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 35 ja 0x67 32: 44 89 c7 mov %r8d,%edi 35: 89 44 24 08 mov %eax,0x8(%rsp) 39: e8 41 c8 f4 ff call 0xfffffffffff4c87f 3e: 8b .byte 0x8b 3f: 44 rex.R Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 35 ja 0x3d 8: 44 89 c7 mov %r8d,%edi b: 89 44 24 08 mov %eax,0x8(%rsp) f: e8 41 c8 f4 ff call 0xfffffffffff4c855 14: 8b .byte 0x8b 15: 44 rex.R [ 25.196074][ T240] RSP: 002b:00007f256a469b70 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 25.196304][ T240] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f256adbe40b [ 25.196532][ T240] RDX: 000000000000001c RSI: 00007f256a469ce0 RDI: 000000000000000b [ 25.196756][ T240] RBP: 000000000000000b R08: 0000000000000000 R09: 00000000004133c0 [ 25.196984][ T240] R10: 00007f256ac76598 R11: 0000000000000293 R12: 000000000040cd28 Finger prints: lockdep_rcu_suspicious:tcp_ao_do_lookup:tcp_connect:tcp_v6_connect:__inet_stream_connect lockdep_rcu_suspicious:tcp_ao_finish_connect:tcp_finish_connect:tcp_rcv_synsent_state_process:tcp_rcv_state_process lockdep_rcu_suspicious:tcp_ao_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt