====================================== | [ 1918.745705][T13123] rcu_scheduler_active = 2, debug_locks = 1 | [ 1918.745941][T13123] no locks held by smcrouted/13123. | [ 1918.746094][T13123] | [ 1918.746094][T13123] stack backtrace: [ 1918.746565][T13123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1918.746938][T13123] Call Trace: [ 1918.747058][T13123] [1918.747149][T13123] dump_stack_lvl (lib/dump_stack.c:123) [1918.747331][T13123] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [1918.747488][T13123] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [1918.747645][T13123] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [1918.747823][T13123] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [1918.748017][T13123] ? __lock_release (kernel/locking/lockdep.c:5501) [1918.748166][T13123] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1918.748331][T13123] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [1918.748484][T13123] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1918.748635][T13123] ? lock_acquire (kernel/locking/lockdep.c:5798) [1918.748793][T13123] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1918.748950][T13123] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1918.749114][T13123] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [1918.749272][T13123] ? __lock_release (kernel/locking/lockdep.c:5486) [1918.749426][T13123] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [1918.749582][T13123] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) [1918.749739][T13123] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [1918.749892][T13123] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [1918.750048][T13123] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:769) [1918.750220][T13123] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1918.750371][T13123] ? 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) [1918.750522][T13123] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [1918.750642][T13123] ? __lock_acquire (kernel/locking/lockdep.c:5202) [1918.750802][T13123] ? find_held_lock (kernel/locking/lockdep.c:5315) [1918.750966][T13123] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1918.751113][T13123] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1918.751266][T13123] rawv6_setsockopt (net/ipv6/raw.c:1054) [1918.751429][T13123] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [1918.751594][T13123] ? __lock_acquire (kernel/locking/lockdep.c:5202) [1918.751776][T13123] ? kfree (mm/slub.c:4716) [1918.751899][T13123] do_sock_setsockopt (net/socket.c:2336) [1918.752101][T13123] ? __pfx_do_sock_setsockopt (net/socket.c:2305) [1918.752256][T13123] ? __lock_release (kernel/locking/lockdep.c:5501) [1918.752417][T13123] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:612) [1918.752584][T13123] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [1918.752735][T13123] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) [1918.752874][T13123] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2361) [1918.753030][T13123] ? __pfx___sys_setsockopt (net/socket.c:2349) [1918.753219][T13123] ? __sys_socket (net/socket.c:496 net/socket.c:1727) [1918.753371][T13123] ? __pfx___sys_socket (net/socket.c:1714) [1918.753530][T13123] __x64_sys_setsockopt (net/socket.c:2365) [1918.753689][T13123] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1918.753888][T13123] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1918.754050][T13123] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1918.754261][T13123] RIP: 0033:0x7f3426ce791e [ 1918.754428][T13123] 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 [ 1918.755006][T13123] RSP: 002b:00007ffea3b5d7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1918.755455][T13123] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3426ce791e [ 1918.755715][T13123] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1918.755942][T13123] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 1918.756298][T13123] R10: 00007ffea3b5d81c R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt