====================================== | [ 1297.309283][T17708] rcu_scheduler_active = 2, debug_locks = 1 | [ 1297.309691][T17708] no locks held by smcrouted/17708. | [ 1297.309957][T17708] | [ 1297.309957][T17708] stack backtrace: [ 1297.310678][T17708] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1297.311002][T17708] Call Trace: [ 1297.311218][T17708] [1297.311368][T17708] dump_stack_lvl (lib/dump_stack.c:123) [1297.311647][T17708] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846) [1297.311918][T17708] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [1297.312189][T17708] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [1297.312459][T17708] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [1297.312797][T17708] ? __lock_release (kernel/locking/lockdep.c:5525) [1297.313063][T17708] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1297.313343][T17708] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [1297.313620][T17708] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1297.313886][T17708] ? lock_acquire (kernel/locking/lockdep.c:5822) [1297.314146][T17708] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1297.314411][T17708] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1297.314686][T17708] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [1297.314963][T17708] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [1297.315229][T17708] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [1297.315499][T17708] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1297.315762][T17708] ? 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) [1297.316150][T17708] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [1297.316363][T17708] ? __lock_acquire (kernel/locking/lockdep.c:5226) [1297.316642][T17708] ? find_held_lock (kernel/locking/lockdep.c:5339) [1297.316920][T17708] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1297.317255][T17708] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1297.317526][T17708] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1297.317798][T17708] rawv6_setsockopt (net/ipv6/raw.c:1054) [1297.318068][T17708] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [1297.318341][T17708] ? find_held_lock (kernel/locking/lockdep.c:5339) [1297.318608][T17708] ? kfree (mm/slub.c:4716) [1297.318806][T17708] ? __lock_release (kernel/locking/lockdep.c:5525) [1297.319067][T17708] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:654) [1297.319338][T17708] do_sock_setsockopt (net/socket.c:2313) [1297.319606][T17708] ? __pfx_do_sock_setsockopt (net/socket.c:2282) [1297.319894][T17708] __sys_setsockopt (net/socket.c:2338) [1297.320172][T17708] __x64_sys_setsockopt (net/socket.c:2341) [1297.320434][T17708] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1297.320768][T17708] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1297.321037][T17708] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1297.321366][T17708] RIP: 0033:0x7f2806e8791e [ 1297.321644][T17708] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 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 a9 All code ======== 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 48 8b 15 e1 94 0a 00 mov 0xa94e1(%rip),%rdx # 0xa94ec b: f7 d8 neg %eax d: 64 89 02 mov %eax,%fs:(%rdx) 10: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax 17: eb b1 jmp 0xffffffffffffffca 19: 0f 1f 00 nopl (%rax) 1c: f3 0f 1e fa endbr64 20: 49 89 ca mov %rcx,%r10 23: b8 36 00 00 00 mov $0x36,%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: a9 .byte 0xa9 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: a9 .byte 0xa9 [ 1297.322533][T17708] RSP: 002b:00007ffdd5f32818 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1297.322934][T17708] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2806e8791e [ 1297.323336][T17708] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1297.323590][T17708] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 1297.323853][T17708] R10: 00007ffdd5f3283c R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt