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Fri, 10 Jun 2022 00:10:19 -0700 (PDT) Date: Fri, 10 Jun 2022 00:10:19 -0700 In-Reply-To: <0000000000003ce9d105e0db53c8@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000085068105e112a117@google.com> Subject: Re: [syzbot] KASAN: use-after-free Read in copy_page_from_iter_atomic (2) From: syzbot To: akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com, hch@lst.de, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1654845019; a=rsa-sha256; cv=none; b=KnMD8KijTJhyYpgB8RLJ1xD9DoH/+WjjwUeMKMYYC9TPReX+QqUffY5s9DSTMXtyA8fvU0 73/qze22Q3jXuORz5YmLRHf9TbvFNKw4t9FuNxLtScL4+bIrZIy+wnPxWal7exr2nDnuSv O1mpsMlzSLM7gwAX38LvMKHDMMBTlFo= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=none; spf=pass (imf16.hostedemail.com: domain of 3W-6iYgkbAN4SYZKALLERAPPID.GOOGLEUSERCONTENT.COM@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.70 as permitted sender) smtp.mailfrom=3W-6iYgkbAN4SYZKALLERAPPID.GOOGLEUSERCONTENT.COM@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; 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dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) X-HE-Tag: 1654845019-331137 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: syzbot has bisected this issue to: commit 4cd4aed63125ccd4efc35162627827491c2a7be7 Author: Christoph Hellwig Date: Fri May 27 08:43:20 2022 +0000 btrfs: fold repair_io_failure into btrfs_repair_eb_io_failure bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1332525ff00000 start commit: ff539ac73ea5 Add linux-next specific files for 20220609 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=10b2525ff00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1732525ff00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a5002042f00a8bce dashboard link: https://syzkaller.appspot.com/bug?extid=d2dd123304b4ae59f1bd syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d6d7cff00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1113b2bff00000 Reported-by: syzbot+d2dd123304b4ae59f1bd@syzkaller.appspotmail.com Fixes: 4cd4aed63125 ("btrfs: fold repair_io_failure into btrfs_repair_eb_io_failure") For information about bisection process see: https://goo.gl/tpsmEJ#bisection