From: Magnus Karlsson <magnus.karlsson@gmail.com>
To: syzbot <syzbot+ddc7b4944bc61da19b81@syzkaller.appspotmail.com>
Cc: "Andrii Nakryiko" <andriin@fb.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Björn Töpel" <bjorn.topel@intel.com>, bpf <bpf@vger.kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
hawk@kernel.org, "John Fastabend" <john.fastabend@gmail.com>,
"Jonathan Lemon" <jonathan.lemon@gmail.com>,
"Martin KaFai Lau" <kafai@fb.com>,
kpsingh@chromium.org, "Jakub Kicinski" <kuba@kernel.org>,
linux-kernel@vger.kernel.org, "Karlsson,
Magnus" <magnus.karlsson@intel.com>,
"Network Development" <netdev@vger.kernel.org>,
"Song Liu" <songliubraving@fb.com>,
syzkaller-bugs@googlegroups.com, "Yonghong Song" <yhs@fb.com>
Subject: Re: general protection fault in xsk_release
Date: Fri, 25 Sep 2020 17:01:06 +0200 [thread overview]
Message-ID: <CAJ8uoz0uGupnd8dqu_X17QE5iV-81n7-CLkL5xES7zkvS_eHdQ@mail.gmail.com> (raw)
In-Reply-To: <000000000000a821aa05b0246452@google.com>
On Fri, Sep 25, 2020 at 4:47 PM syzbot
<syzbot+ddc7b4944bc61da19b81@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 3fc826f1 Merge branch 'net-dsa-bcm_sf2-Additional-DT-chang..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=158f8009900000
> kernel config: https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
> dashboard link: https://syzkaller.appspot.com/bug?extid=ddc7b4944bc61da19b81
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16372c81900000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100bd2c3900000
>
> The issue was bisected to:
>
> commit 1c1efc2af158869795d3334a12fed2afd9c51539
> Author: Magnus Karlsson <magnus.karlsson@intel.com>
> Date: Fri Aug 28 08:26:17 2020 +0000
>
> xsk: Create and free buffer pool independently from umem
Thanks. On it.
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=157a3103900000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=177a3103900000
> console output: https://syzkaller.appspot.com/x/log.txt?x=137a3103900000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+ddc7b4944bc61da19b81@syzkaller.appspotmail.com
> Fixes: 1c1efc2af158 ("xsk: Create and free buffer pool independently from umem")
>
> RAX: ffffffffffffffda RBX: 00007fff675613c0 RCX: 0000000000443959
> RDX: 0000000000000030 RSI: 0000000020000000 RDI: 0000000000000003
> RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000001bbbbbb
> R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
> R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
> general protection fault, probably for non-canonical address 0xdffffc00000000ad: 0000 [#1] PREEMPT SMP KASAN
> KASAN: null-ptr-deref in range [0x0000000000000568-0x000000000000056f]
> CPU: 0 PID: 6888 Comm: syz-executor811 Not tainted 5.9.0-rc6-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> RIP: 0010:dev_put include/linux/netdevice.h:3899 [inline]
> RIP: 0010:xsk_unbind_dev net/xdp/xsk.c:521 [inline]
> RIP: 0010:xsk_release+0x63f/0x7d0 net/xdp/xsk.c:591
> Code: 00 00 48 c7 85 c8 04 00 00 00 00 00 00 e8 29 a0 47 fe 48 8d bb 68 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 66 01 00 00 48 8b 83 68 05 00 00 65 ff 08 e9 54
> RSP: 0018:ffffc90005707c90 EFLAGS: 00010202
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff815b9de2
> RDX: 00000000000000ad RSI: ffffffff882d2317 RDI: 0000000000000568
> RBP: ffff888091aae000 R08: 0000000000000001 R09: ffffffff8d0ffaaf
> R10: fffffbfff1a1ff55 R11: 0000000000000000 R12: ffff888091aae5f8
> R13: ffff888091aae4c8 R14: dffffc0000000000 R15: 1ffff11012355cb5
> FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000004c8b88 CR3: 0000000093ea3000 CR4: 00000000001506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> __sock_release+0xcd/0x280 net/socket.c:596
> sock_close+0x18/0x20 net/socket.c:1277
> __fput+0x285/0x920 fs/file_table.c:281
> task_work_run+0xdd/0x190 kernel/task_work.c:141
> exit_task_work include/linux/task_work.h:25 [inline]
> do_exit+0xb7d/0x29f0 kernel/exit.c:806
> do_group_exit+0x125/0x310 kernel/exit.c:903
> __do_sys_exit_group kernel/exit.c:914 [inline]
> __se_sys_exit_group kernel/exit.c:912 [inline]
> __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:912
> do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
> RIP: 0033:0x442588
> Code: Bad RIP value.
> RSP: 002b:00007fff67561328 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
> RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000442588
> RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
> RBP: 00000000004c8b50 R08: 00000000000000e7 R09: ffffffffffffffd0
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
> R13: 00000000006dd280 R14: 0000000000000000 R15: 0000000000000000
> Modules linked in:
> ---[ end trace 9742ad575ae08359 ]---
> RIP: 0010:dev_put include/linux/netdevice.h:3899 [inline]
> RIP: 0010:xsk_unbind_dev net/xdp/xsk.c:521 [inline]
> RIP: 0010:xsk_release+0x63f/0x7d0 net/xdp/xsk.c:591
> Code: 00 00 48 c7 85 c8 04 00 00 00 00 00 00 e8 29 a0 47 fe 48 8d bb 68 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 66 01 00 00 48 8b 83 68 05 00 00 65 ff 08 e9 54
> RSP: 0018:ffffc90005707c90 EFLAGS: 00010202
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff815b9de2
> RDX: 00000000000000ad RSI: ffffffff882d2317 RDI: 0000000000000568
> RBP: ffff888091aae000 R08: 0000000000000001 R09: ffffffff8d0ffaaf
> R10: fffffbfff1a1ff55 R11: 0000000000000000 R12: ffff888091aae5f8
> R13: ffff888091aae4c8 R14: dffffc0000000000 R15: 1ffff11012355cb5
> FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000004c8b88 CR3: 0000000093ea3000 CR4: 00000000001506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>
>
> ---
> This report 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 issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
prev parent reply other threads:[~2020-09-25 15:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 14:47 general protection fault in xsk_release syzbot
2020-09-25 15:01 ` Magnus Karlsson [this message]
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