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[209.85.220.69]) by mx.google.com with SMTPS id i133sor1064853iof.39.2019.06.06.06.52.11 for (Google Transport Security); Thu, 06 Jun 2019 06:52:11 -0700 (PDT) Received-SPF: pass (google.com: domain of 3ixr5xakbajiekl6w770dwbb4z.2aa270ge0dya9f09f.ya8@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3ixr5xakbajiekl6w770dwbb4z.2aa270ge0dya9f09f.ya8@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3ixr5XAkbAJIEKL6w770DwBB4z.2AA270GE0DyA9F09F.yA8@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: APXvYqxsOSemHsUbujSph9lEzIDYC7+nk5LCzhefqqwo192xfbCeFrUgqyeODNjVlpcURg4PEu+WR9j7lfp6hBZjNe0whweIPjv3 MIME-Version: 1.0 X-Received: by 2002:a6b:4f14:: with SMTP id d20mr14000242iob.219.1559829131378; Thu, 06 Jun 2019 06:52:11 -0700 (PDT) Date: Thu, 06 Jun 2019 06:52:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004945f1058aa80556@google.com> Subject: KASAN: slab-out-of-bounds Read in corrupted (2) From: syzbot To: akpm@linux-foundation.org, cai@lca.pw, crecklin@redhat.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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: Hello, syzbot found the following crash on: HEAD commit: 156c0591 Merge tag 'linux-kselftest-5.2-rc4' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13512d51a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=60564cb52ab29d5b dashboard link: https://syzkaller.appspot.com/bug?extid=9a901acbc447313bfe3e compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a4b01ea00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9a901acbc447313bfe3e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in vsnprintf+0x1727/0x19a0 lib/vsprintf.c:2503 Read of size 8 at addr ffff8880a91c7d00 by task syz-executor.0/9821 CPU: 0 PID: 9821 Comm: syz-executor.0 Not tainted 5.2.0-rc3+ #13 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 1024: (stack is not available) Freed by task 2310999008: ------------[ cut here ]------------ Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'skbuff_head_cache' (offset 24, size 1)! WARNING: CPU: 0 PID: 9821 at mm/usercopy.c:78 usercopy_warn+0xeb/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... Shutting down cpus with NMI Kernel Offset: disabled --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches