====================================== | [ 1252.657675][ T4456] rcu_scheduler_active = 2, debug_locks = 1 | [ 1252.657905][ T4456] no locks held by smcrouted/4456. | [ 1252.658062][ T4456] | [ 1252.658062][ T4456] stack backtrace: [ 1252.658560][ T4456] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1252.658757][ T4456] Call Trace: [ 1252.658880][ T4456] [ 1252.658966][ T4456] dump_stack_lvl (lib/dump_stack.c:123) [ 1252.659134][ T4456] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846) [ 1252.659300][ T4456] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [ 1252.659464][ T4456] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [ 1252.659634][ T4456] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [ 1252.659842][ T4456] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1252.660000][ T4456] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1252.660166][ T4456] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 1252.660332][ T4456] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1252.660499][ T4456] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 1252.660658][ T4456] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1252.660827][ T4456] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1252.660992][ T4456] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [ 1252.661156][ T4456] ? validate_chain (kernel/locking/lockdep.c:3816 kernel/locking/lockdep.c:3872) [ 1252.661331][ T4456] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [ 1252.661498][ T4456] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1252.661667][ T4456] ? 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) [ 1252.661831][ T4456] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1252.661961][ T4456] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 1252.662145][ T4456] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1252.662315][ T4456] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1252.662477][ T4456] ? __create_object (mm/kmemleak.c:766) [ 1252.662638][ T4456] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 1252.662802][ T4456] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1252.662965][ T4456] ? 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) [ 1252.663130][ T4456] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1252.663262][ T4456] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1252.663426][ T4456] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1252.663592][ T4456] rawv6_setsockopt (net/ipv6/raw.c:1054) [ 1252.663760][ T4456] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [ 1252.663918][ T4456] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1252.664082][ T4456] ? kfree (mm/slub.c:4716) [ 1252.664203][ T4456] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1252.664363][ T4456] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:654) [ 1252.664532][ T4456] do_sock_setsockopt (net/socket.c:2313) [ 1252.664694][ T4456] ? __pfx_do_sock_setsockopt (net/socket.c:2282) [ 1252.664871][ T4456] __sys_setsockopt (net/socket.c:2338) [ 1252.665039][ T4456] __x64_sys_setsockopt (net/socket.c:2341) [ 1252.665196][ T4456] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 1252.665400][ T4456] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 1252.665575][ T4456] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1252.665775][ T4456] RIP: 0033:0x7f3948ba591e [ 1252.665942][ T4456] 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 [ 1252.666498][ T4456] RSP: 002b:00007fffd37b8988 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1252.666738][ T4456] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3948ba591e [ 1252.666971][ T4456] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1252.667205][ T4456] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000dbe010 [ 1252.667440][ T4456] R10: 00007fffd37b89ac R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt