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Date:   Tue, 20 Dec 2022 00:43:25 -0800
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Subject: Re: [syzbot] KASAN: use-after-free Read in put_pmu_ctx
From:   syzbot <syzbot+b8e8c01c8ade4fe6e48f@syzkaller.appspotmail.com>
To:     acme@kernel.org, alexander.shishkin@linux.intel.com,
        bpf@vger.kernel.org, jolsa@kernel.org,
        linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
        mark.rutland@arm.com, mingo@redhat.com, namhyung@kernel.org,
        netdev@vger.kernel.org, peterz@infradead.org,
        syzkaller-bugs@googlegroups.com
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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