linux-kernel - Re: [syzbot] [bcachefs?] [rcu?] BUG: unable to handle kernel NULL pointer dereference in rcu

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Message-ID: <6849df90.a70a0220.cc01e.058d.GAE@google.com>
Date: Wed, 11 Jun 2025 12:57:04 -0700
From: syzbot <syzbot+80e5d6f453f14a53383a@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, josh@...htriplett.org, 
	kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, paulmck@...nel.org, 
	rcu@...r.kernel.org, syzkaller-bugs@...glegroups.com, urezki@...il.com
Subject: Re: [syzbot] [bcachefs?] [rcu?] BUG: unable to handle kernel NULL
 pointer dereference in rcu_core (3)

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+80e5d6f453f14a53383a@...kaller.appspotmail.com
Tested-by: syzbot+80e5d6f453f14a53383a@...kaller.appspotmail.com

Tested on:

commit:         488ef356 KEYS: Invert FINAL_PUT bit
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=129a660c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=713d218acd33d94
dashboard link: https://syzkaller.appspot.com/bug?extid=80e5d6f453f14a53383a
compiler:       Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
patch:          https://syzkaller.appspot.com/x/patch.diff?x=170e460c580000

Note: testing is done by a robot and is best-effort only.