[syzbot] KASAN: use-after-free Read in rxrpc_destroy_all_locals

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: rcu detected stall in corrupted

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4104 } 2661 jiffies s: 2777 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):


Tested on:

commit:         efb7555b rxrpc: Fix I/O thread stop
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/ afs-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=16b83997880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fb14358c9774adf3
dashboard link: https://syzkaller.appspot.com/bug?extid=1eb4232fca28c0a6d1c2
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.