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(majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727482AbeGMJPp (ORCPT ); Fri, 13 Jul 2018 05:15:45 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:43903 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726425AbeGMJPp (ORCPT ); Fri, 13 Jul 2018 05:15:45 -0400 Received: by mail-it0-f71.google.com with SMTP id n68-v6so6926668ite.8 for ; Fri, 13 Jul 2018 02:02:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=bIdGZxvCK8dwBjDxfE4ZW9xugihCxIRrSHtdhi+CS9w=; b=r/qhTuYrLCmrJ/cxGUDpBkQ2v/9eKoueOWwH77nqA9Yyx3ZhRRsx6HQBVqZFZlVENM RC+IwTu71D7qAp3m/y5SMwYHmoCUQM3KqrgrF3aI9LUylA0It2FJorVe7lujIEWLfa4n 9aWl9cOQ+vcc35+U1pKUSAoLYyncl/hJcwp18gwfAHifIC/8zitTAsdnC0Mw5mmIBlQU eBEYRmfx2WT2ejnPzbTGuNonyS7l6xwOl1+bAz38RpFRbisGOR/4JQ12Qmx0o9WER+E1 MJOmkoLEH3AoGx/0RYgCfIIT+J0IBAFlTDdTz4/w/ssD9JSzJwR2lffIT7QrcYq6s9Vz MfCA== X-Gm-Message-State: AOUpUlHJ/MDgmj/giFDs2+pw3LhRXLnXUdt8mgvdMA/IVnuGYh+/JB/B WrJccI2np0mXYsyAKTCY9zEliTZIxqxiZ0v1IBDCM3q3a1Or X-Google-Smtp-Source: AAOMgpfyg05rof9qum65UV0dXX6jJ7VI1MlJPa6qKbwmYuz1z7Q5Syc1ZF1RP9kaXvht2ow/5WNGe3nE7oK95he1luyFOOJZpBB/ MIME-Version: 1.0 X-Received: by 2002:a02:760c:: with SMTP id z12-v6mr2336090jab.33.1531472521908; Fri, 13 Jul 2018 02:02:01 -0700 (PDT) Date: Fri, 13 Jul 2018 02:02:01 -0700 In-Reply-To: <000000000000483ec605708a998d@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a6dc900570ddbbe8@google.com> Subject: Re: general protection fault in kfree (2) From: syzbot To: davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, rminnich@sandia.gov, syzkaller-bugs@googlegroups.com, v9fs-developer@lists.sourceforge.net Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 3ee15ba60e6b Add linux-next specific files for 20180712 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11d3652c400000 kernel config: https://syzkaller.appspot.com/x/.config?x=fe1c3df2c7c0c81 dashboard link: https://syzkaller.appspot.com/bug?extid=1ff9d2e170913c4ef264 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=10d9d1a4400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10657794400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1ff9d2e170913c4ef264@syzkaller.appspotmail.com FS-Cache: O-cookie c=00000000bfe1c402 [p=00000000445b4196 fl=222 nc=0 na=1] FS-Cache: O-cookie d=00000000a5eb7aa3 n=000000005d36a973 kasan: CONFIG_KASAN_INLINE enabled FS-Cache: O-key=[10] ' kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 4474 Comm: syz-executor242 Not tainted 4.18.0-rc4-next-20180712+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 34 RIP: 0010:virt_to_head_page include/linux/mm.h:638 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Code: 32 82 cb 01 00 39 00 48 ba 00 00 34 00 80 ff 77 36 00 00 48 01 39 c2 48 89 df 35 48 b8 00 00 00 31 00 00 ea ff 35 ff 48 c1 ea 35 0c 48 c1 e2 ' 06 48 01 c2 <48> FS-Cache: N-cookie c=00000000525aeed3 [p=00000000445b4196 fl=2 nc=0 na=1] 8b 42 08 a8 01 FS-Cache: N-cookie d=00000000a5eb7aa3 n=000000003a05f34d 48 8d 48 ff 48 FS-Cache: N-key=[10] ' 0f 45 d1 4c 8b 34 6a 18 49 63 75 32 74 RSP: 0018:ffff8801b105f5d0 EFLAGS: 00010003 39 RAX: ffffea0000000000 RBX: f780d0382154ac00 RCX: 1ffff1003620bed8 RDX: 03ddef20e0855280 RSI: ffffffff87700e50 RDI: f780d0382154ac00 RBP: ffff8801b105f5f0 R08: ffff8801ade02380 R09: ffffed003620bdf8 34 R10: ffffed0039d876c0 R11: 0000000000000001 R12: 0000000000000282 R13: ffffffff87700e8a R14: ffff8801b105f740 R15: ffff8801ce4c0540 FS: 00007feab2d14700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 36 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f32b40b0000 CR3: 00000001c4338000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 39 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 35 p9_client_version net/9p/client.c:1010 [inline] p9_client_create+0xfea/0x1770 net/9p/client.c:1070 31 35 35 ' kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x118/0x440 fs/fs_context.c:659 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 ksys_mount+0x12d/0x140 fs/namespace.c:3105 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445b59 Code: e8 bc e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007feab2d13da8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445b59 RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 RBP: 00000000006dac38 R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0031656c69662f2e R13: 6f6c3d6568636163 R14: 64663d736e617274 R15: 0000000000000001 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace bacf24c1f955b911 ]--- general protection fault: 0000 [#2] SMP KASAN CPU: 1 PID: 4472 Comm: syz-executor242 Tainted: G D 4.18.0-rc4-next-20180712+ #6 RIP: 0010:virt_to_head_page include/linux/mm.h:638 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: RIP: 0010:virt_to_head_page include/linux/mm.h:638 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 82 Code: cb 82 01 cb 00 01 00 00 48 00 ba 48 00 00 ba 00 00 80 00 ff 00 77 80 00 ff 00 77 48 00 00 01 48 c2 01 48 c2 89 48 df 89 48 df b8 48 00 b8 00 00 00 00 00 00 00 00 ea 00 ff ea ff ff 48 ff c1 48 ea c1 0c ea 48 0c c1 48 e2 c1 06 e2 48 06 01 48 c2 01 <48> c2 8b <48> 42 8b 08 42 a8 08 01 a8 48 01 8d 48 48 8d ff 48 48 ff 0f 48 45 0f d1 45 4c d1 8b 4c 6a 8b 18 6a 49 18 63 49 75 63 74 75 74 RSP: 0018:ffff8801b105f5d0 EFLAGS: 00010003 RSP: 0018:ffff8801b3db75d0 EFLAGS: 00010003 RAX: ffffea0000000000 RBX: f780d0382154ac00 RCX: 1ffff1003620bed8 RDX: 03ddef20e0855280 RSI: ffffffff87700e50 RDI: f780d0382154ac00 RAX: ffffea0000000000 RBX: afd91d4db7636200 RCX: 1ffff100367b6ed8 RBP: ffff8801b105f5f0 R08: ffff8801ade02380 R09: ffffed003620bdf8 RDX: 02bf505536dd8d80 RSI: ffffffff87700e50 RDI: afd91d4db7636200 R10: ffffed0039d876c0 R11: 0000000000000001 R12: 0000000000000282 RBP: ffff8801b3db75f0 R08: ffff8801ad62a300 R09: ffffed00367b6df8 R13: ffffffff87700e8a R14: ffff8801b105f740 R15: ffff8801ce4c0540 R10: ffffed0039d876e0 R11: 0000000000000001 R12: 0000000000000282 FS: 00007feab2d14700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 R13: ffffffff87700e8a R14: ffff8801b3db7740 R15: ffff8801aa0a03c0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 FS: 00007feab2d14700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CR2: 00007f32b40b0000 CR3: 00000001c4338000 CR4: 00000000001406f0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CR2: 00007f32b40b0000 CR3: 00000001c0acc000 CR4: 00000000001406e0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000