====================================== | [ 1323.742611][T14321] rcu_scheduler_active = 2, debug_locks = 1 | [ 1323.742936][T14321] no locks held by smcrouted/14321. | [ 1323.743306][T14321] | [ 1323.743306][T14321] stack backtrace: [ 1323.743794][T14321] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1323.743992][T14321] Call Trace: [ 1323.744113][T14321] <TASK> [1323.744198][T14321] dump_stack_lvl (lib/dump_stack.c:123) [1323.744366][T14321] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) [1323.744526][T14321] ip6mr_get_table (net/ipv6/ip6mr.c:132 (discriminator 11)) [1323.744689][T14321] ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1670) [1323.744848][T14321] ? __pfx_ip6_mroute_setsockopt (net/ipv6/ip6mr.c:1658) [1323.745046][T14321] ? __lock_release (kernel/locking/lockdep.c:5501) [1323.745203][T14321] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1323.745366][T14321] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [1323.745538][T14321] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1323.745695][T14321] ? lock_acquire (kernel/locking/lockdep.c:5798) [1323.745851][T14321] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1323.746007][T14321] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) [1323.746167][T14321] do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:415) [1323.746326][T14321] ? __lock_release (kernel/locking/lockdep.c:5486) [1323.746483][T14321] ? __pfx_do_ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:395) [1323.746636][T14321] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) [1323.746793][T14321] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [1323.746953][T14321] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) [1323.747113][T14321] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:769) [1323.747281][T14321] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [1323.747434][T14321] ? 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) [1323.747593][T14321] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) [1323.747718][T14321] ? __lock_acquire (kernel/locking/lockdep.c:5202) [1323.747883][T14321] ? find_held_lock (kernel/locking/lockdep.c:5315) [1323.748045][T14321] ? ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1323.748198][T14321] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:996) [1323.748360][T14321] rawv6_setsockopt (net/ipv6/raw.c:1054) [1323.748525][T14321] ? __pfx_rawv6_setsockopt (net/ipv6/raw.c:1039) [1323.748681][T14321] ? __lock_acquire (kernel/locking/lockdep.c:5202) [1323.748838][T14321] ? kfree (mm/slub.c:4716) [1323.748961][T14321] do_sock_setsockopt (net/socket.c:2336) [1323.749119][T14321] ? __pfx_do_sock_setsockopt (net/socket.c:2305) [1323.749276][T14321] ? __lock_release (kernel/locking/lockdep.c:5501) [1323.749430][T14321] ? fd_install (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 fs/file.c:612) [1323.749589][T14321] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [1323.749753][T14321] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) [1323.749877][T14321] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2361) [1323.750034][T14321] ? __pfx___sys_setsockopt (net/socket.c:2349) [1323.750187][T14321] ? __sys_socket (net/socket.c:496 net/socket.c:1727) [1323.750348][T14321] ? __pfx___sys_socket (net/socket.c:1714) [1323.750506][T14321] ? do_user_addr_fault (./include/linux/mmap_lock.h:172 arch/x86/mm/fault.c:1417) [1323.750664][T14321] __x64_sys_setsockopt (net/socket.c:2365) [1323.750818][T14321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [1323.751016][T14321] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [1323.751179][T14321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 1323.751375][T14321] RIP: 0033:0x7f22f81d891e [ 1323.751539][T14321] 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 [ 1323.752072][T14321] RSP: 002b:00007ffe2f4118d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1323.752312][T14321] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f22f81d891e [ 1323.752546][T14321] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008 [ 1323.752776][T14321] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000 [ 1323.753008][T14321] R10: 00007ffe2f4118fc R11: 0000000000000246 R12: 0000000000000000 Finger prints: lockdep_rcu_suspicious:ip6mr_get_table:ip6_mroute_setsockopt:do_ipv6_setsockopt:ipv6_setsockopt