====================================== | [ 1307.529367][ T8916] rcu_scheduler_active = 2, debug_locks = 1 | [ 1307.529768][ T8916] no locks held by smcrouted/8916. | [ 1307.529965][ T8916] | [ 1307.529965][ T8916] stack backtrace: [ 1307.530640][ T8916] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1307.530969][ T8916] Call Trace: [ 1307.531165][ T8916] <TASK> [ 1307.531306][ T8916] dump_stack_lvl (lib/dump_stack.c:123) [ 1307.531577][ T8916] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [ 1307.531848][ T8916] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [ 1307.532108][ T8916] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [ 1307.532379][ T8916] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [ 1307.532712][ T8916] ? __lock_release (kernel/locking/lockdep.c:5501) [ 1307.532970][ T8916] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1307.533227][ T8916] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 1307.533514][ T8916] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1307.533768][ T8916] ? lock_acquire (kernel/locking/lockdep.c:5798) [ 1307.534017][ T8916] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1307.534271][ T8916] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [ 1307.534524][ T8916] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [ 1307.534714][ T8916] ? __lock_release (kernel/locking/lockdep.c:5477) [ 1307.534882][ T8916] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [ 1307.535114][ T8916] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) [ 1307.535374][ T8916] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 1307.535617][ T8916] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [ 1307.535899][ T8916] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:769) [ 1307.536151][ T8916] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 1307.536436][ T8916] ? 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) [ 1307.536661][ T8916] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [ 1307.536858][ T8916] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 1307.537123][ T8916] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 1307.537340][ T8916] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1307.537515][ T8916] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [ 1307.537681][ T8916] rawv6_setsockopt (net/ipv6/raw.c:1054) [ 1307.537851][ T8916] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [ 1307.538091][ T8916] ? __lock_acquire (kernel/locking/lockdep.c:5202) [ 1307.538371][ T8916] ? kfree (mm/slub.c:4716) [ 1307.538584][ T8916] do_sock_setsockopt (net/socket.c:2336) [ 1307.538835][ T8916] ? __pfx_do_sock_setsockopt (net/socket.c:2305) [ 1307.539093][ T8916] ? __lock_release (kernel/locking/lockdep.c:5501) [ 1307.539348][ T8916] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:612) [ 1307.539613][ T8916] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 1307.539874][ T8916] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) [ 1307.540083][ T8916] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2361) [ 1307.540358][ T8916] ? __pfx___sys_setsockopt (net/socket.c:2349) [ 1307.540625][ T8916] ? __sys_socket (net/socket.c:496 net/socket.c:1727) [ 1307.540876][ T8916] ? __pfx___sys_socket (net/socket.c:1714) [ 1307.541126][ T8916] ? do_user_addr_fault (./include/linux/mmap_lock.h:172 arch/x86/mm/fault.c:1417) [ 1307.541388][ T8916] __x64_sys_setsockopt (net/socket.c:2365) [ 1307.541648][ T8916] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 1307.541956][ T8916] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 1307.542213][ T8916] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1307.542528][ T8916] RIP: 0033:0x7f10983ae91e [ 1307.542789][ T8916] 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 [ 1307.543656][ T8916] RSP: 002b:00007ffcc6c7aff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1307.544033][ T8916] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f10983ae91e [ 1307.544397][ T8916] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1307.544803][ T8916] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 1307.545101][ T8916] R10: 00007ffcc6c7b01c R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt