linux-kernel - [Syzkaller & bisect] There is "__perf_event_overflow" WARNING in v6.1-rc5 kernel in guest

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Date:   Wed, 16 Nov 2022 11:39:53 +0800
From:   Pengfei Xu <pengfei.xu@...el.com>
To:     <peterz@...radead.org>, <peter.zijlstra@...el.com>
CC:     <linux-kernel@...r.kernel.org>, <pengfei.xu@...el.com>,
        <heng.su@...el.com>
Subject: [Syzkaller & bisect] There is "__perf_event_overflow" WARNING in
 v6.1-rc5 kernel in guest

Hi Peter and perf expert,

Greeting!

Platform: TGL-H

There is "__perf_event_overflow" WARNING issue in v6.1-rc5 kernel in
guest in double check test.

Found first bad commit is ca6c21327c6af02b7eec31ce4b9a740a18c6c13f
"perf: Fix missing SIGTRAPs"

And revert this commit on top of v6.1-rc5, this issue could not be reproduced.

Guest kconfig, reproduce code from syzkaller, and bisect info are in attached.

And more detailed info is in link:
https://github.com/xupengfe/syzkaller_logs/tree/main/221114_134736___perf_event_overflow

If it's helpful and in time, please add the Reported-by tag from me.

Thanks!
BR.

View attachment "bisect.log" of type "text/plain" (25253 bytes)

View attachment "repro.c" of type "text/plain" (5455 bytes)

View attachment "config_guest" of type "text/plain" (278992 bytes)