From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 AED261B85F8 for ; Fri, 5 Sep 2025 22:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757112845; cv=none; b=PItTxk3m02U9ELg+KrVgCIzTgYM2pKjCfC8ZoIxCK6kTZnIfAxv+gTeVy+se22AAlfa/D5zbzPmGv78o4J/QhxhmcUuF21CI6ND9gzy1NWjzV8ucNwnf+b5rLNR0RDlo3XIwZQza4xvk/SiNvGFpo7OvsWz+/QjngOyyRYupDko= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757112845; c=relaxed/simple; bh=xmt+7MUYLe/TsNdv+UTy27pUcBGcGqm6Q3U60XaPyoQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=EMHFTHpsEl7rmk98tvoFJD1GErH7OjbIAN/LJUEHAbEQFnFkftVCX+teSqrSt7oPcO/tWL3N95c99DiFUTDeTC2bRd74gGZ4WkTgaVNvrD+kCkmyuDfndD0SW3HmAI8J10XXJLaysDx4DDM1p0DSklb8P+7XtIv4xWbW67eGVkw= 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=209.85.166.72 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-io1-f72.google.com with SMTP id ca18e2360f4ac-88778bf677cso3246439f.1 for ; Fri, 05 Sep 2025 15:54:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757112843; x=1757717643; 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=COPuUn8LM+pX0RzcctilePF0Lz9RNH7VZuFaMlEVmdg=; b=UK4ufv3Qd6kToJmgLzK8wbLcXnhkY696meIm9fFzu7jEgUHT0KJ2NhOrJWFQl2Dos6 T8akKM/ggR2hX3kC9J5rOdr+4L5lSuXzfTlr8KnNzQae5sBTrP2inEnN9HHgZ0pcQCcf at2fNJ1Abtkzybl6eE3BAuNvOlv97Y0cfb+CkuSNqF55KjiVE0OpzdDLlN51NAYhPnLv f8gKCCn7VqCc7idIxh+4JgfuEySsn5bnzwSRiZsDTauZttGIdEGvWmxbLbkBXPmurMI7 qsut56IOyET889FQSxacoO9TiM2zqztulh186rM538ho6vXPDFfGw3+Ww0BqCvGu9B2B xN3Q== X-Forwarded-Encrypted: i=1; AJvYcCXD2c765F5RnXFySsbOITz+818j83P5h9Bk6A3Ws2uVZU4lSfi5wAmYdhINrhqLqg5B2iQwoC22vkOj9vU=@vger.kernel.org X-Gm-Message-State: AOJu0YzypntF85fVoP9LxCeAth3xCFKFwkjpFKN55Hxv7u969D2uKmYj k07q+25xV377RJT5IzJQQ6/1ThLcl6YdXDcF0d8CHDXESAINw4O/MOE+a+PtEWx+htRdprK/w30 O+chrTY+fSVrbXV9UWkaBsJzC8mKUEzF7eEI7ux9MRvX/UtOHCLwG49NuEN4= X-Google-Smtp-Source: AGHT+IEHOamtQTp9ShtnVHZx0Qpq4+0a3CZAv0AdYvOBwovxa8eWaiFwDq5yJg/DbuolI2h+7rl1AdMtyIvqKAj+FgJsMR10oQyF Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3810:b0:3e5:4e4f:65df with SMTP id e9e14a558f8ab-3fd82163cbfmr10431275ab.9.1757112842915; Fri, 05 Sep 2025 15:54:02 -0700 (PDT) Date: Fri, 05 Sep 2025 15:54:02 -0700 In-Reply-To: <68bacb00.050a0220.192772.018c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68bb6a0a.050a0220.192772.01a0.GAE@google.com> Subject: Re: [syzbot] [bcachefs?] KASAN: use-after-free Read in bch2_prt_printf From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit c21f41f6905be4fc5059a10a5bba94105ba87269 Author: Kent Overstreet Date: Thu Apr 24 21:55:20 2025 +0000 bcachefs: bch2_dirent_to_text() shows casefolded dirents bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12c65312580000 start commit: d69eb204c255 Merge tag 'net-6.17-rc5' of git://git.kernel... git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=11c65312580000 console output: https://syzkaller.appspot.com/x/log.txt?x=16c65312580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bd9738e00c1bbfb4 dashboard link: https://syzkaller.appspot.com/bug?extid=7f176adb30b21606c5fc syz repro: https://syzkaller.appspot.com/x/repro.syz?x=178ec962580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10097162580000 Reported-by: syzbot+7f176adb30b21606c5fc@syzkaller.appspotmail.com Fixes: c21f41f6905b ("bcachefs: bch2_dirent_to_text() shows casefolded dirents") For information about bisection process see: https://goo.gl/tpsmEJ#bisection