From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B4A1435950; Tue, 11 Nov 2025 09:24:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762853074; cv=none; b=S0Uj1OoWYry2MRJPJ0uXJqamDPlXaC+UsvJnddrz3eYpFA7GVBkOGIQMefFSR2GNmJYVP9YDWE5rGhqfxFJnd7WKmVGCKXdcIanJHSEAAQ0Cl+xo789nnTkhjoyPQN3a3Mp2Hp9yIkXADPdXj4j0Bn7ZGfcptLT81wQ/jv2HIHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762853074; c=relaxed/simple; bh=oqo4ODlyQOZAF+e8zvIC1WyiLILrt4nXl7b8zNXWo44=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=nbjlwnuRwKtDgMH8PZ6PY+Wr1Ip5BO86OvlOx+hNo8PzQcZ46sf1SgzMU0+k5/LokwF85rgFF0A+0YG+JHfgMVLpzvRW7c7WtoRIiw8txbFR4FecqGc8reuyskzy8pjSKkZe2yjmldsheFnUB2TwEbQRA/SRT1IMgVHuB2Chi8Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b4F6wrYi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="b4F6wrYi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A841C116B1; Tue, 11 Nov 2025 09:24:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762853074; bh=oqo4ODlyQOZAF+e8zvIC1WyiLILrt4nXl7b8zNXWo44=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=b4F6wrYigF74u/gM39t5dR4yPM/K39Os3h41DM2HEnQyd7F3uIzD8A3fxAuLwXaFk Xr0ugeiA8A+oQ7qOVe0xZvkVcmuX5W7EnOj5B/UEG+VJsA+cxjdU5LxoMnQwH01aAF uQR1i6zpFgV5/1sf/LPS6F2MeS82TASh9CPIwSv+Mo60ws8nZrTolhCqULZXDJ/Inp WNLVu3MijLSIvYeNENkBYXsmFW0fdmcbbcdaBhDUx4nCfby2JC34XSIJby6UGuj8CN uSm04F6slHTJtqvCdO2jkOoESqNVSjsmw7pLJat+5mO2wMbErWhjv4xacl5iobdWP9 fu6Hj1x4bETrQ== Date: Tue, 11 Nov 2025 10:24:24 +0100 From: Christian Brauner To: syzbot Cc: Liam.Howlett@oracle.com, akpm@linux-foundation.org, bpf@vger.kernel.org, bsegall@google.com, david@redhat.com, dietmar.eggemann@arm.com, jack@suse.cz, jsavitz@redhat.com, juri.lelli@redhat.com, kartikey406@gmail.com, kees@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, lorenzo.stoakes@oracle.com, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, mjguzik@gmail.com, oleg@redhat.com, paul@paul-moore.com, peterz@infradead.org, rostedt@goodmis.org, rppt@kernel.org, sergeh@kernel.org, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vincent.guittot@linaro.org, viro@zeniv.linux.org.uk, vschneid@redhat.com Subject: Re: [syzbot] [fs?] WARNING in nsproxy_ns_active_put Message-ID: <20251111-lausbub-wieweit-76ec521875b2@brauner> References: <690bfb9e.050a0220.2e3c35.0013.GAE@google.com> <69104fa2.a70a0220.22f260.00a5.GAE@google.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <69104fa2.a70a0220.22f260.00a5.GAE@google.com> On Sun, Nov 09, 2025 at 12:24:02AM -0800, syzbot wrote: > syzbot has bisected this issue to: > > commit 3a18f809184bc5a1cfad7cde5b8b026e2ff61587 > Author: Christian Brauner > Date: Wed Oct 29 12:20:24 2025 +0000 > > ns: add active reference count > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11a350b4580000 > start commit: 9c0826a5d9aa Add linux-next specific files for 20251107 > git tree: linux-next > final oops: https://syzkaller.appspot.com/x/report.txt?x=13a350b4580000 > console output: https://syzkaller.appspot.com/x/log.txt?x=15a350b4580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f2ebeee52bf052b8 > dashboard link: https://syzkaller.appspot.com/bug?extid=0b2e79f91ff6579bfa5b > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1639d084580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1625aa92580000 > > Reported-by: syzbot+0b2e79f91ff6579bfa5b@syzkaller.appspotmail.com > Fixes: 3a18f809184b ("ns: add active reference count") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz test: https://github.com/brauner/linux.git namespace-6.19