From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 C11091B043F for ; Thu, 27 Mar 2025 23:44:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743119046; cv=none; b=nanuS8UOdkcNYHSRsbWtpJqtS6pKQ/vJH1FW3xm9y5CRu2btN291HsciOYgGc6T3AyvIWZ8xXJSQZ3Bcd6ISF7emPQdHf9bopXfFgvMrjvFTi6RhAjLryfS5577pNLWDhRpIxlkFixhaqsvtlr4mVaSe+jqTWSz3NXEoX+5K1I4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743119046; c=relaxed/simple; bh=zJfe+ntDz0a5gqUOPpRgPJsQIkqcEFey64SoptgS/Iw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=do0tXDAkNOVSD/djUJ39itc866pcnZZapDFo1hjHdz5TK29g3hCD0ZwWYzrA+GyrdILicBZCTYF3ySMRBh5QInsxLUk0vyPpvT3g0L0nOXLJiocSHk3SJxZfIGmeF/nIGIYuk0ardpejU3bxfDD7v6OzlBKGyee/pjDz+k6OIlw= 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=209.85.166.199 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-il1-f199.google.com with SMTP id e9e14a558f8ab-3ce843b51c3so33256465ab.0 for ; Thu, 27 Mar 2025 16:44:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743119044; x=1743723844; 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=9HyMx14slmZO48hXwKrnjOU7rwzYOFJJ2XuwciiG24c=; b=bc5TXIa0+wniIub2tYq+Zzm0L8H/wfFMxEqYS9UzQF3QSrMD6ATfXpR+X14eynV7zy eazN/MZVQ79hYPzHVw8C4I8Un8WuDjnYuowWijJsUiYrpdPN/SEsbVp00cWkPHnubYNi yNSfdsT+CYb2/+EVabcu6uWXmwsu01sxe8/sc/e7AP98IkQGOiZUJNRb+jwPRadRqvyO nx0Oxdy0fpXrH5aq2T034hYICRcpK653u6eNZOAnH5XCtGwOXbyIt3F1VLXoJ1fLseZp aTWCagrpxNE8E0mhX+BNTKC1eJchnK8FyCSpg0Sz3756TEMMGkRcTN6wYEwbifQUJ0VA J1PA== X-Forwarded-Encrypted: i=1; AJvYcCU5qqZoNAEE1cCTgbOl5Q95A8q5UsiqWbBJ5vVZQx5hq1dpkVjHaQhELlOCVjM4djhQyuI5Y8d0aFcT@vger.kernel.org X-Gm-Message-State: AOJu0YxZVsD2BH1HsuIMrJ+ylaH3QB9HSN+8yS4S5Z0Xu0x9gMQ4O2rh 0A53lHMD35huyyTZ0lU9aMuZQkpTLGs50jXUUg1SvDlSyBi/wzIc4bivnlz91gBT+j6LggzfgGl N9hBlLESRAMIhgUMvmZIVbxeZRvzFV4BXS2GmoBx2XJYOPhV1yv4LM0g= X-Google-Smtp-Source: AGHT+IGP0KfS302a6JahnEaFSrCURrW/iARLg9wT0HWhuDbr6UaQ3NEOiHKp2eCied/LzPpIPMg8HST/OAGgBXsb5bJEocyXgbCb Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1fed:b0:3d3:f6ee:cc4c with SMTP id e9e14a558f8ab-3d5ccce76c2mr58974305ab.0.1743119043917; Thu, 27 Mar 2025 16:44:03 -0700 (PDT) Date: Thu, 27 Mar 2025 16:44:03 -0700 In-Reply-To: <6772fd43.050a0220.2f3838.04cd.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67e5e2c3.050a0220.2f068f.0050.GAE@google.com> Subject: Re: [syzbot] [ext4?] KASAN: use-after-free Read in ext4_find_extent (4) From: syzbot To: adilger.kernel@dilger.ca, jack@suse.cz, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, ojaswin@linux.ibm.com, ritesh.list@gmail.com, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 93cdf49f6eca5e23f6546b8f28457b2e6a6961d9 Author: Ojaswin Mujoo Date: Sat Mar 25 08:13:39 2023 +0000 ext4: Fix best extent lstart adjustment logic in ext4_mb_new_inode_pa() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1566b43f980000 start commit: 1e1ba8d23dae Merge tag 'timers-clocksource-2025-03-26' of .. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1766b43f980000 console output: https://syzkaller.appspot.com/x/log.txt?x=1366b43f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=2edddb53537e0320 dashboard link: https://syzkaller.appspot.com/bug?extid=ee60e584b5c6bb229126 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1623343f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1123343f980000 Reported-by: syzbot+ee60e584b5c6bb229126@syzkaller.appspotmail.com Fixes: 93cdf49f6eca ("ext4: Fix best extent lstart adjustment logic in ext4_mb_new_inode_pa()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection