======================================
| [ 3933.111910][ T6713] 1 lock held by sctp_hello/6713:
| [ 3933.112079][ T6713] #0: ffff888010f8b218 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sctp_bind (./arch/x86/include/asm/jump_label.h:27 net/sctp/socket.c:315) sctp
| [ 3933.112594][ T6713]
| [ 3933.112594][ T6713] stack backtrace:
[ 3933.113090][ T6713] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3933.113304][ T6713] Call Trace:
[ 3933.113437][ T6713]  <TASK>
[ 3933.113527][ T6713] dump_stack_lvl (lib/dump_stack.c:123) 
[ 3933.113703][ T6713] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 3933.113876][ T6713] dev_get_by_index_rcu (net/core/dev.c:876 (discriminator 7)) 
[ 3933.114045][ T6713] sctp_v6_available (net/sctp/ipv6.c:701) sctp
[ 3933.114245][ T6713] sctp_do_bind (net/sctp/socket.c:400) sctp
[ 3933.114771][ T6713] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 3933.114990][ T6713] sctp_bind (net/sctp/socket.c:320) sctp
[ 3933.115198][ T6713] inet6_bind_sk (net/ipv6/af_inet6.c:451) 
[ 3933.115366][ T6713] ? __pfx_inet6_bind_sk (net/ipv6/af_inet6.c:442) 
[ 3933.115536][ T6713] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) 
[ 3933.115714][ T6713] __sys_bind (net/socket.c:1845 net/socket.c:1869) 
[ 3933.115842][ T6713] ? __pfx___sys_bind (net/socket.c:1860) 
[ 3933.116009][ T6713] ? __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) 
[ 3933.116188][ T6713] ? 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) 
[ 3933.116364][ T6713] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 3933.116534][ T6713] __x64_sys_bind (net/socket.c:1875) 
[ 3933.116702][ T6713] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 3933.116870][ T6713] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3933.117077][ T6713] RIP: 0033:0x7f77f7d29b2b
[ 3933.117260][ T6713] Code: Unable to access opcode bytes at 0x7f77f7d29b01.

Code starting with the faulting instruction
===========================================
[ 3933.117466][ T6713] RSP: 002b:00007ffc6dc04068 EFLAGS: 00000202 ORIG_RAX: 0000000000000031
[ 3933.117723][ T6713] RAX: ffffffffffffffda RBX: 00007ffc6dc04258 RCX: 00007f77f7d29b2b
[ 3933.117971][ T6713] RDX: 000000000000001c RSI: 00007ffc6dc040a0 RDI: 0000000000000005
[ 3933.118219][ T6713] RBP: 0000000000000005 R08: 1999999999999999 R09: 0000000000000000
[ 3933.118469][ T6713] R10: 00007f77f7cfad90 R11: 0000000000000202 R12: 00007ffc6dc059da


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