======================================
| [ 3951.001386][ T5328] 1 lock held by sctp_hello/5328:
| [ 3951.001649][ T5328] #0: ffff888012c3bb98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sctp_bind (./arch/x86/include/asm/jump_label.h:27 net/sctp/socket.c:315) sctp
| [ 3951.002000][ T5328]
| [ 3951.002000][ T5328] stack backtrace:
[ 3951.002505][ T5328] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3951.002720][ T5328] Call Trace:
[ 3951.002852][ T5328]  <TASK>
[ 3951.002943][ T5328] dump_stack_lvl (lib/dump_stack.c:123) 
[ 3951.003129][ T5328] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 3951.003305][ T5328] dev_get_by_index_rcu (net/core/dev.c:876 (discriminator 7)) 
[ 3951.003478][ T5328] sctp_v6_available (net/sctp/ipv6.c:701) sctp
[ 3951.003687][ T5328] sctp_do_bind (net/sctp/socket.c:400) sctp
[ 3951.003900][ T5328] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 3951.004118][ T5328] sctp_bind (net/sctp/socket.c:320) sctp
[ 3951.004325][ T5328] inet6_bind_sk (net/ipv6/af_inet6.c:451) 
[ 3951.004812][ T5328] ? __pfx_inet6_bind_sk (net/ipv6/af_inet6.c:442) 
[ 3951.004983][ T5328] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) 
[ 3951.005164][ T5328] __sys_bind (net/socket.c:1845 net/socket.c:1869) 
[ 3951.005295][ T5328] ? __pfx___sys_bind (net/socket.c:1860) 
[ 3951.005468][ T5328] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2749 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3317 kernel/locking/rwsem.c:1345) 
[ 3951.005648][ T5328] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 3951.005826][ T5328] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 3951.006004][ T5328] __x64_sys_bind (net/socket.c:1875) 
[ 3951.006176][ T5328] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 3951.006348][ T5328] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3951.006564][ T5328] RIP: 0033:0x7fb6fec6fb2b
[ 3951.006748][ T5328] Code: Unable to access opcode bytes at 0x7fb6fec6fb01.

Code starting with the faulting instruction
===========================================
[ 3951.006962][ T5328] RSP: 002b:00007ffc624f7548 EFLAGS: 00000206 ORIG_RAX: 0000000000000031
[ 3951.007217][ T5328] RAX: ffffffffffffffda RBX: 00007ffc624f7738 RCX: 00007fb6fec6fb2b
[ 3951.007468][ T5328] RDX: 000000000000001c RSI: 00007ffc624f7580 RDI: 0000000000000005
[ 3951.007722][ T5328] RBP: 0000000000000005 R08: 1999999999999999 R09: 0000000000000000
[ 3951.007972][ T5328] R10: 00007fb6fec40d90 R11: 0000000000000206 R12: 00007ffc624f99da


Finger prints:
lockdep_rcu_suspicious:dev_get_by_index_rcu:sctp_v6_available:sctp_do_bind:sctp_bind