Subject: Re: [syzbot] KASAN: use-after-free Read in put_pmu_ctx

From: syzbot <[email-masked]>
Date: Tue, 20 Dec 2022 00:43:25 -0800

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: { P5791 } 2673 jiffies s: 2805 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):

Tested on:

commit:         13e3c779 Merge tag 'for-netdev' of https://git.kernel...
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
console output: https://syzkaller.appspot.com/x/log.txt?x=121ea2e8480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b0e91ad4b5f69c47
dashboard link: https://syzkaller.appspot.com/bug?extid=b8e8c01c8ade4fe6e48f
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12d4ad4f880000