From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f69.google.com (mail-oa1-f69.google.com [209.85.160.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FA5D320A0C for ; Thu, 5 Feb 2026 08:30:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770280203; cv=none; b=b9tGn8LVr0UsZg+XRbyI3m5fsV6k3Jrl71MnTdgB059OWbW/yRDxQ8CmrNrfLNRhZNZk2fKQk5NGB8UwtqaTaGr/4yL2dKII4lRziKuqkfeEjzmUMzoFznHL8xqCorfFRZWBLFUBiatSFj2DVJGxDV5BC0KLr9/QuoewVdV+J8c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770280203; c=relaxed/simple; bh=uMswa8QgyTDD4PSRzJyW7FHr5n7JVIst00rKkccJkbA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=DjTJt2h9pcivB1UsoMRzQpvgInpHyCmoU/6j1jL9CZHbcg0Ycqz6Yf5mgODbU7Bb7dfDv9mbQ9cIlG09xgAkaRqRb8u7ByFP2Mc26KXcalHYMjX4GyTJJ0eRFLT8i/V8v4HNYatAsBEDtotj0FvRuR1Bg9sN1HfwnhC4G+XswcQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.160.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oa1-f69.google.com with SMTP id 586e51a60fabf-4041710f90fso3095831fac.2 for ; Thu, 05 Feb 2026 00:30:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770280202; x=1770885002; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=llRsHVUGZUWzlNHdbad61AK1n7j7FSs2B3eJju6Uw+Q=; b=YifdXQ7tq/ElPtgX1wPBajPMBVKfDLnKtrmEAwG7zNiSAxuGU5KEEJVQMNzUwtc9MZ UCUex87YAuniSk2A2OCeY+9IkyWNVET3Q+6Bm9FEe5JQaEtg0ieJchHb7izsrlSo6ln2 J6YKuVFgwZVu8tQ8kRXbTSkQGaQ9AVUOACPmGKiO0hWDOwU8GCz8vXkqxIiNEj8wwAH6 2i25TBa5xPT6ROeeRJkzJnLlJmgXw/QEk5/tO+H54CVUBHjEUr3Yx5ahanV44y9olGyo yNqxZXSsXdsu43ZvJ0VFU2AzpeuzkEdczXCdLKGEzxZUDyUaIA3SimVovkk569gqXBYs h0BQ== X-Forwarded-Encrypted: i=1; AJvYcCWWIQtlZuVBmZgkJoXG0oUobUAP+5RDt7VCGuncRwjDlTDFjRn+2C9Y4cwAE91sO99wcps=@vger.kernel.org X-Gm-Message-State: AOJu0YwWOZIQKcq9g/l1rxuIdo2HLPZ9jj8PrJV2vEiwXTEjGw5XG128 vTlDMRY5K2eCJu574exQKfXjgDZZKE+lTaO0Pu3Zfpco7WEPkk9/JKuLnijlTosSx+vi7fD95wp knMwIsLVEVMy91YdE0Q9TCcPLgwZ1K62amRU1Q13GnUzfmvMEMXNJrG0xuOk= Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1522:b0:663:f65:1c8b with SMTP id 006d021491bc7-66a229794admr2711424eaf.51.1770280202384; Thu, 05 Feb 2026 00:30:02 -0800 (PST) Date: Thu, 05 Feb 2026 00:30:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6984550a.050a0220.3b3015.001b.GAE@google.com> Subject: Re: [syzbot] [bpf?] WARNING: refcount bug in __add_used_btf From: syzbot To: a.s.protopopov@gmail.com, alexei.starovoitov@gmail.com, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, netdev@vger.kernel.org, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-by: syzbot+5a0f1995634f7c1dadbf@syzkaller.appspotmail.com Tested-by: syzbot+5a0f1995634f7c1dadbf@syzkaller.appspotmail.com Tested on: commit: ea7bf7f2 bpf: Fix a potential use-after-free git tree: https://github.com/aspsk/bpf-next.git fix-btf-refcount console output: https://syzkaller.appspot.com/x/log.txt?x=150eda5a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b5a1ee0109784fc2 dashboard link: https://syzkaller.appspot.com/bug?extid=5a0f1995634f7c1dadbf compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Note: no patches were applied. Note: testing is done by a robot and is best-effort only.