====================================== | [ 1261.675746][ T4455] rcu_scheduler_active = 2, debug_locks = 1 | [ 1261.675979][ T4455] no locks held by smcrouted/4455. | [ 1261.676135][ T4455] | [ 1261.676135][ T4455] stack backtrace: [ 1261.676572][ T4455] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1261.676780][ T4455] Call Trace: [ 1261.676908][ T4455] <TASK> [ 1261.676999][ T4455] dump_stack_lvl (lib/dump_stack.c:123) [ 1261.677171][ T4455] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846) [ 1261.677341][ T4455] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [ 1261.677499][ T4455] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [ 1261.677664][ T4455] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [ 1261.677882][ T4455] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1261.678077][ T4455] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1261.678263][ T4455] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 1261.678443][ T4455] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1261.678620][ T4455] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 1261.678802][ T4455] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1261.678978][ T4455] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1261.679171][ T4455] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [ 1261.679354][ T4455] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 1261.679523][ T4455] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [ 1261.679704][ T4455] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1261.679886][ T4455] ? 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) [ 1261.680057][ T4455] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1261.680199][ T4455] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 1261.680388][ T4455] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1261.680562][ T4455] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1261.680740][ T4455] ? __create_object (mm/kmemleak.c:766) [ 1261.680920][ T4455] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 1261.681095][ T4455] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1261.681282][ T4455] ? 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) [ 1261.681469][ T4455] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1261.681607][ T4455] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1261.681792][ T4455] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1261.681968][ T4455] rawv6_setsockopt (net/ipv6/raw.c:1054) [ 1261.682153][ T4455] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [ 1261.682317][ T4455] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1261.682481][ T4455] ? kfree (mm/slub.c:4716) [ 1261.682603][ T4455] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1261.682763][ T4455] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:654) [ 1261.682934][ T4455] do_sock_setsockopt (net/socket.c:2313) [ 1261.683104][ T4455] ? __pfx_do_sock_setsockopt (net/socket.c:2282) [ 1261.683285][ T4455] __sys_setsockopt (net/socket.c:2338) [ 1261.683455][ T4455] __x64_sys_setsockopt (net/socket.c:2341) [ 1261.683622][ T4455] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 1261.683828][ T4455] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 1261.684007][ T4455] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1261.684222][ T4455] RIP: 0033:0x7fb4b14b991e [ 1261.684406][ T4455] 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 [ 1261.684982][ T4455] RSP: 002b:00007ffd853c6e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1261.685229][ T4455] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb4b14b991e [ 1261.685471][ T4455] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1261.685727][ T4455] RBP: 0000000000000008 R08: 0000000000000004 R09: 000000002726f010 [ 1261.685984][ T4455] R10: 00007ffd853c6e8c R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt