====================================== | [ 12.256729][ T281] rcu_scheduler_active = 2, debug_locks = 1 | [ 12.257010][ T281] no locks held by smcrouted/281. | [ 12.257213][ T281] | [ 12.257213][ T281] stack backtrace: [ 12.257723][ T281] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.257940][ T281] Call Trace: [ 12.258072][ T281] [ 12.258168][ T281] dump_stack_lvl (lib/dump_stack.c:123) [ 12.258360][ T281] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 12.258552][ T281] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [ 12.258728][ T281] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [ 12.258902][ T281] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [ 12.259119][ T281] ? __lock_release (kernel/locking/lockdep.c:5501) [ 12.259295][ T281] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 12.259469][ T281] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 12.259649][ T281] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 12.259817][ T281] ? lock_acquire (kernel/locking/lockdep.c:5798) [ 12.259988][ T281] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 12.260154][ T281] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 12.260330][ T281] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [ 12.260508][ T281] ? __lock_release (kernel/locking/lockdep.c:5477) [ 12.260680][ T281] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [ 12.260856][ T281] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) [ 12.261027][ T281] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 12.261200][ T281] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 12.261376][ T281] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:769) [ 12.261558][ T281] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.261725][ T281] ? 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) [ 12.261895][ T281] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 12.262029][ T281] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 12.262199][ T281] ? queued_spin_lock_slowpath (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2130 ./include/linux/atomic/atomic-instrumented.h:1280 ./arch/x86/include/asm/qspinlock.h:104 kernel/locking/qspinlock.c:324) [ 12.262378][ T281] ? __pfx_queued_spin_lock_slowpath (kernel/locking/qspinlock.c:314) [ 12.262602][ T281] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 12.262781][ T281] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 12.262953][ T281] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 12.263122][ T281] rawv6_setsockopt (net/ipv6/raw.c:1054) [ 12.263301][ T281] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [ 12.263498][ T281] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 12.263679][ T281] ? kfree (mm/slub.c:4716) [ 12.263817][ T281] do_sock_setsockopt (net/socket.c:2336) [ 12.264028][ T281] ? __pfx_do_sock_setsockopt (net/socket.c:2305) [ 12.264212][ T281] ? __lock_release (kernel/locking/lockdep.c:5501) [ 12.264382][ T281] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:612) [ 12.264556][ T281] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 12.264732][ T281] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) [ 12.264869][ T281] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2361) [ 12.265060][ T281] ? __pfx___sys_setsockopt (net/socket.c:2349) [ 12.265247][ T281] ? __sys_socket (net/socket.c:496 net/socket.c:1727) [ 12.265421][ T281] ? __pfx___sys_socket (net/socket.c:1714) [ 12.265593][ T281] ? do_user_addr_fault (./include/linux/mmap_lock.h:172 arch/x86/mm/fault.c:1417) [ 12.265773][ T281] __x64_sys_setsockopt (net/socket.c:2365) [ 12.265941][ T281] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 12.266151][ T281] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.266329][ T281] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.266538][ T281] RIP: 0033:0x7f891a93891e [ 12.266717][ T281] 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 [ 12.267310][ T281] RSP: 002b:00007ffe781fda08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 12.267573][ T281] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f891a93891e [ 12.267827][ T281] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 12.268084][ T281] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 12.268345][ T281] R10: 00007ffe781fda2c R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt