====================================== | [ 26.946926][ T233] 1 lock held by connect_ipv4/233: | [ 26.947349][ T233] #0: ffff888006a03798 (sk_lock-AF_INET){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) | [ 26.947634][ T233] | [ 26.947634][ T233] stack backtrace: [ 26.948082][ T233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 26.948418][ T233] Call Trace: [ 26.948539][ T233] [ 26.948623][ T233] dump_stack_lvl (lib/dump_stack.c:123) [ 26.948779][ T233] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 26.948958][ T233] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) [ 26.949118][ T233] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 26.949274][ T233] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) [ 26.949458][ T233] ? stack_depot_save_flags (lib/stackdepot.c:664) [ 26.949625][ T233] ? kasan_save_stack (mm/kasan/common.c:48) [ 26.949777][ T233] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 26.949924][ T233] ? kasan_save_free_info (mm/kasan/generic.c:582) [ 26.950072][ T233] ? __kasan_slab_free (mm/kasan/common.c:271) [ 26.950216][ T233] ? kfree (mm/slub.c:4579 mm/slub.c:4727) [ 26.950328][ T233] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) [ 26.950504][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 26.950664][ T233] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) [ 26.950816][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 26.950970][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) [ 26.951118][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 26.951273][ T233] ? 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) [ 26.951421][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 26.951543][ T233] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 26.951688][ T233] do_tcp_getsockopt (net/ipv4/tcp.c:4631) [ 26.951839][ T233] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) [ 26.951986][ T233] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) [ 26.952154][ T233] ? release_sock (net/core/sock.c:3630) [ 26.952301][ T233] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) [ 26.952446][ T233] ? release_sock (net/core/sock.c:3630) [ 26.952598][ T233] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 26.952745][ T233] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 26.952892][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 26.953042][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) [ 26.953205][ T233] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 26.953352][ T233] ? 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) [ 26.953506][ T233] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 26.953625][ T233] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 26.953782][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 26.953933][ T233] ? __lock_release (kernel/locking/lockdep.c:5501) [ 26.954077][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 26.954224][ T233] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) [ 26.954369][ T233] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 26.954517][ T233] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 26.954672][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 26.954818][ T233] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) [ 26.954966][ T233] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) [ 26.955120][ T233] do_sock_getsockopt (net/socket.c:2396) [ 26.955269][ T233] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) [ 26.955416][ T233] ? __pfx_do_sock_getsockopt (net/socket.c:2374) [ 26.955571][ T233] ? fdget (fs/file.c:1121 fs/file.c:1128) [ 26.955685][ T233] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) [ 26.955831][ T233] ? __sys_setsockopt (net/socket.c:2360) [ 26.955993][ T233] ? __pfx___sys_getsockopt (net/socket.c:2415) [ 26.956141][ T233] ? __pfx___sys_socket (net/socket.c:1712) [ 26.956306][ T233] __x64_sys_getsockopt (net/socket.c:2432) [ 26.956452][ T233] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 26.956631][ T233] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 26.956796][ T233] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 26.956980][ T233] RIP: 0033:0x7fa06ec4346e [ 26.957142][ T233] 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 [ 26.957656][ T233] RSP: 002b:00007fff93ce4bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 26.957877][ T233] RAX: ffffffffffffffda RBX: 00007fff93ce4e70 RCX: 00007fa06ec4346e [ 26.958097][ T233] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009 [ 26.958328][ T233] RBP: 00007fff93ce4bd0 R08: 00007fff93ce4bcc R09: 0000000000000064 [ 26.958550][ T233] R10: 00007fff93ce4bd0 R11: 0000000000000246 R12: 0000000000000009 [ 26.958764][ T233] R13: 0000000000000064 R14: 0000000000000020 R15: 0000000000000064 | [ 26.962609][ T240] 1 lock held by connect_ipv4/240: | [ 26.962781][ T240] #0: ffff888006a02a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) | [ 26.963068][ T240] | [ 26.963068][ T240] stack backtrace: [ 26.963564][ T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 26.963907][ T240] Call Trace: [ 26.964043][ T240] [ 26.964123][ T240] dump_stack_lvl (lib/dump_stack.c:123) [ 26.964278][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 26.964474][ T240] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) [ 26.964627][ T240] tcp_v4_ao_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222 net/ipv4/tcp_ao.c:720) [ 26.964781][ T240] tcp_connect (net/ipv4/tcp_output.c:4114) [ 26.964936][ T240] tcp_v4_connect (net/ipv4/tcp_ipv4.c:342) [ 26.965094][ T240] ? __pfx_tcp_v4_connect (net/ipv4/tcp_ipv4.c:220) [ 26.965248][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 26.965381][ T240] __inet_stream_connect (net/ipv4/af_inet.c:677) [ 26.965555][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 26.965745][ T240] inet_stream_connect (net/ipv4/af_inet.c:749) [ 26.965922][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) [ 26.966071][ T240] ? __pfx___sys_connect (net/socket.c:2078) [ 26.966226][ T240] ? do_fcntl (fs/fcntl.c:473) [ 26.966353][ T240] ? __pfx_do_fcntl (fs/fcntl.c:443) [ 26.966512][ T240] ? __fget_files (fs/file.c:1009) [ 26.966672][ T240] __x64_sys_connect (net/socket.c:2095) [ 26.966821][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 26.966982][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 26.967171][ T240] RIP: 0033:0x7fa06ec4340b [ 26.967342][ 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 [ 26.967906][ T240] RSP: 002b:00007fa06e2eeb70 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 26.968146][ T240] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fa06ec4340b [ 26.968383][ T240] RDX: 0000000000000010 RSI: 00007fa06e2eece0 RDI: 000000000000000a [ 26.968605][ T240] RBP: 000000000000000a R08: 0000000000000000 R09: 00000000ffffffff [ 26.968844][ T240] R10: 00007fa06eafb598 R11: 0000000000000293 R12: 000000000040cd18 [ 26.969105][ T240] R13: 0000000000000005 R14: 00007fa06e2eece0 R15: 0000000000000000 | [ 26.975168][ T240] 1 lock held by connect_ipv4/240: | [ 26.975389][ T240] #0: ffff888006a02a58 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) | [ 26.975667][ T240] | [ 26.975667][ T240] stack backtrace: [ 26.976105][ T240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 26.976438][ T240] Call Trace: [ 26.976553][ T240] [ 26.976634][ T240] dump_stack_lvl (lib/dump_stack.c:123) [ 26.976788][ T240] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 26.976943][ T240] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) [ 26.977094][ T240] tcp_finish_connect (net/ipv4/tcp_input.c:6340) [ 26.977246][ T240] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) [ 26.977434][ 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) [ 26.977593][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 26.977712][ T240] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) [ 26.977897][ T240] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 26.978081][ T240] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [ 26.978258][ 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)) [ 26.978379][ T240] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 26.978531][ T240] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) [ 26.978680][ T240] ? __lock_release (kernel/locking/lockdep.c:5501) [ 26.978829][ T240] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) [ 26.978982][ T240] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) [ 26.979166][ T240] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 26.979287][ T240] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1945) [ 26.979476][ T240] __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) [ 26.979644][ T240] release_sock (net/core/sock.c:3633) [ 26.979822][ T240] inet_stream_connect (net/ipv4/af_inet.c:751) [ 26.979979][ T240] __sys_connect (net/socket.c:2071 net/socket.c:2088) [ 26.980129][ T240] ? __pfx___sys_connect (net/socket.c:2078) [ 26.980300][ T240] ? do_fcntl (fs/fcntl.c:473) [ 26.980419][ T240] ? __pfx_do_fcntl (fs/fcntl.c:443) [ 26.980580][ T240] ? __fget_files (fs/file.c:1009) [ 26.980741][ T240] __x64_sys_connect (net/socket.c:2095) [ 26.980915][ T240] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 26.981071][ T240] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 26.981280][ T240] RIP: 0033:0x7fa06ec4340b [ 26.981438][ 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 [ 26.982034][ T240] RSP: 002b:00007fa06e2eeb70 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 26.982265][ T240] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fa06ec4340b [ 26.982506][ T240] RDX: 0000000000000010 RSI: 00007fa06e2eece0 RDI: 000000000000000a [ 26.982736][ T240] RBP: 000000000000000a R08: 0000000000000000 R09: 00000000ffffffff [ 26.982958][ T240] R10: 00007fa06eafb598 R11: 0000000000000293 R12: 000000000040cd18 Finger prints: lockdep_rcu_suspicious:tcp_v4_ao_lookup:tcp_connect:tcp_v4_connect:__inet_stream_connect lockdep_rcu_suspicious:tcp_ao_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt lockdep_rcu_suspicious:tcp_ao_finish_connect:tcp_finish_connect:tcp_rcv_synsent_state_process:tcp_rcv_state_process