====================================== | [ 1300.208280][ T4706] rcu_scheduler_active = 2, debug_locks = 1 | [ 1300.208703][ T4706] no locks held by smcrouted/4706. | [ 1300.208966][ T4706] | [ 1300.208966][ T4706] stack backtrace: [ 1300.209649][ T4706] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1300.209949][ T4706] Call Trace: [ 1300.210161][ T4706] [ 1300.210306][ T4706] dump_stack_lvl (lib/dump_stack.c:123) [ 1300.210562][ T4706] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846) [ 1300.210840][ T4706] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [ 1300.211116][ T4706] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [ 1300.211391][ T4706] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [ 1300.211740][ T4706] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1300.212022][ T4706] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1300.212298][ T4706] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 1300.212574][ T4706] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1300.212836][ T4706] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 1300.213097][ T4706] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1300.213358][ T4706] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1300.213631][ T4706] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [ 1300.213898][ T4706] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 1300.214159][ T4706] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [ 1300.214436][ T4706] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1300.214696][ T4706] ? 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) [ 1300.214947][ T4706] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1300.215161][ T4706] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 1300.215448][ T4706] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1300.215715][ T4706] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1300.215969][ T4706] ? __create_object (mm/kmemleak.c:766) [ 1300.216234][ T4706] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 1300.216514][ T4706] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1300.216775][ T4706] ? 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) [ 1300.217038][ T4706] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 1300.217244][ T4706] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1300.217507][ T4706] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1300.217773][ T4706] rawv6_setsockopt (net/ipv6/raw.c:1054) [ 1300.218039][ T4706] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [ 1300.218296][ T4706] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 1300.218567][ T4706] ? kfree (mm/slub.c:4716) [ 1300.218701][ T4706] ? __lock_release (kernel/locking/lockdep.c:5525) [ 1300.218858][ T4706] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:654) [ 1300.219020][ T4706] do_sock_setsockopt (net/socket.c:2313) [ 1300.219182][ T4706] ? __pfx_do_sock_setsockopt (net/socket.c:2282) [ 1300.219355][ T4706] __sys_setsockopt (net/socket.c:2338) [ 1300.219518][ T4706] __x64_sys_setsockopt (net/socket.c:2341) [ 1300.219675][ T4706] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 1300.219870][ T4706] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 1300.220040][ T4706] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1300.220235][ T4706] RIP: 0033:0x7f4c51f6d91e [ 1300.220404][ T4706] 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 [ 1300.220946][ T4706] RSP: 002b:00007fffd63eca98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1300.221186][ T4706] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4c51f6d91e [ 1300.221429][ T4706] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1300.221665][ T4706] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 1300.221902][ T4706] R10: 00007fffd63ecabc R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt