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 487D6197A7E for ; Thu, 25 Jul 2024 10:37:25 +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=1721903846; cv=none; b=byGF4JmkxQ+Jvf3N6RSwGkiMu/mCw+0exbZ+z6KZTQ+M2PisqugMNQgOi8MKl7P2pbQBbWARJtlVOZCCXhDU1uwDvEM2Qv6s16XXuzNck1TwlmUU68l9tthYNokfayeSApFTQTRS3ghy9fH7d/a3BhgL0NZcgxo169VKXJ5NLeQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721903846; c=relaxed/simple; bh=qSKX9p5YVWAvitEQ24g+XcA8SWuCHO5k7LZTcK93pRU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kSUXjIjcH+ohWja1FEqz1z1eYYnWzpJQSEjYF4eeenTJ9F3rSg70ueUfgh5umxiZLe1+FpkW8jhI/jRFKsi2ZbyavLXM9+NIF9pE1G7KmKoxiFBIro1hqMi06qthBlV5nQrSWsrKHAS5K4uX9oSgtTgBCn8mz5pvKF55vv9unms= 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-3988d01a236so6806865ab.1 for ; Thu, 25 Jul 2024 03:37:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721903844; x=1722508644; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=U0pc+mI4+ATyUGYpTpDp/lsXoG4NSyaYIoXdPooAzhE=; b=o3M/SDQOBotCxdt9vELp7bSMwPQA+LPJeeCpHpYMecp42o2D75aQVDiMw1UgkNdPPN yVxqZ9qmbWT4VUUeiBiC88hEAoCTGta17IiyJzsQ+Zs7wup7SqOgHrzTbESkmIoqke+0 vhY9Ye2q3BDdI6Cj2WEE50xkediMC8CRc0WzrXQ/ndz/q1Mh0nprxrXDUKIr0iO8BqT5 LqdkhYop/AZ/cJxR6SdRyiEu4rWbdm3HPG4oCkm/5z6LAPed9OYxVgKdMji9Qy34l0eQ AWlJkiWWI2W3mLLjZLXO8uZnkjdl4n136Uo6/BR/0CUVC2qyMd8gF/AVTBXvpD8PCug1 /2oA== X-Forwarded-Encrypted: i=1; AJvYcCWUqv5aBeehGejciO+ABjnsgrPAxvzlv5Nj4AXoof3FQGxQUm8XofXe3tEo4wiyLJAWJo8mmOnjSs1jYZoC5Etg6bhMBtwF X-Gm-Message-State: AOJu0YzV/Tzv5J+mPZQIRZuwktQKL7fGe/y1nwpxle8c/7Iomgv/9kkf L9twwVPTApoOmeSKASr66UYRIt8QeTwsXYgSGV/xopvT8mmNMXVpfgCFgV24ncfHmKF+jJnrDeu 3diYIZ9I07fCpcpyljnw2zEFdmz1X5dy7HlnBtyjXQKBQvL/+urAj+kA= X-Google-Smtp-Source: AGHT+IGuyq/HTso4AkXAK6GX3rN5MFwy22n9vWGz3ph4z5vxpyJy3fDzwORE1DGON3OQ/bKYdvK6gKwJz1uc3mdeKu0oa5SF5Oms Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b24:b0:396:ec3b:df65 with SMTP id e9e14a558f8ab-39a24011ffemr1540995ab.4.1721903844284; Thu, 25 Jul 2024 03:37:24 -0700 (PDT) Date: Thu, 25 Jul 2024 03:37:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f9eeec061e0ffa03@google.com> Subject: [syzbot] [net?] BUG: unable to handle kernel paging request in net_generic From: syzbot To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c912bf709078 Merge remote-tracking branches 'origin/arm64-.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1625a15e980000 kernel config: https://syzkaller.appspot.com/x/.config?x=79a49b0b9ffd6585 dashboard link: https://syzkaller.appspot.com/bug?extid=6acef9e0a4d1f46c83d4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fea69a9d153c/disk-c912bf70.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/be06762a72ef/vmlinux-c912bf70.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c8e58b4215d/Image-c912bf70.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6acef9e0a4d1f46c83d4@syzkaller.appspotmail.com Unable to handle kernel paging request at virtual address dfff800000000257 KASAN: probably user-memory-access in range [0x00000000000012b8-0x00000000000012bf] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000257] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 6969 Comm: syz.2.105 Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : net_generic+0xd0/0x250 include/net/netns/generic.h:46 lr : rcu_read_lock include/linux/rcupdate.h:782 [inline] lr : net_generic+0x54/0x250 include/net/netns/generic.h:45 sp : ffff8000a6c86c10 x29: ffff8000a6c86c10 x28: dfff800000000000 x27: 0000000000000802 x26: 0000000000000002 x25: 1ffff00014d90d88 x24: dfff800000000000 x23: ffff0000ca3fbd70 x22: ffff8000a6c86c40 x21: dfff800000000000 x20: 00000000000012b8 x19: 000000000000004e x18: 1ffff00014d90cfe x17: 000000000003099a x16: ffff80008054bde8 x15: 0000000000000001 x14: ffff80008f100568 x13: dfff800000000000 x12: 00000000af8628cd x11: 0000000068a0e22d x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000257 x7 : ffff80008a4326a8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff80008b681f20 x0 : 0000000000000001 Call trace: net_generic+0xd0/0x250 include/net/netns/generic.h:46 l2tp_pernet net/l2tp/l2tp_core.c:125 [inline] l2tp_tunnel_get+0x90/0x464 net/l2tp/l2tp_core.c:207 l2tp_udp_recv_core net/l2tp/l2tp_core.c:852 [inline] l2tp_udp_encap_recv+0x314/0xb3c net/l2tp/l2tp_core.c:933 udpv6_queue_rcv_one_skb+0x1870/0x1ad4 net/ipv6/udp.c:727 udpv6_queue_rcv_skb+0x3bc/0x574 net/ipv6/udp.c:789 udp6_unicast_rcv_skb+0x1cc/0x320 net/ipv6/udp.c:929 __udp6_lib_rcv+0xbcc/0x1330 net/ipv6/udp.c:1018 udpv6_rcv+0x88/0x9c net/ipv6/udp.c:1133 ip6_protocol_deliver_rcu+0x988/0x12a4 net/ipv6/ip6_input.c:438 ip6_input_finish+0x164/0x298 net/ipv6/ip6_input.c:483 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314 ip6_input+0x90/0xa8 net/ipv6/ip6_input.c:492 dst_input include/net/dst.h:460 [inline] ip6_rcv_finish+0x1f0/0x21c net/ipv6/ip6_input.c:79 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5625 [inline] __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5739 netif_receive_skb_internal net/core/dev.c:5825 [inline] netif_receive_skb+0x1f0/0x93c net/core/dev.c:5885 tun_rx_batched+0x568/0x6e4 tun_get_user+0x260c/0x3978 drivers/net/tun.c:2002 tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x8f8/0xc38 fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: d2d00015 f2fbfff5 8b080294 d343fe88 (38756908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d2d00015 mov x21, #0x800000000000 // #140737488355328 4: f2fbfff5 movk x21, #0xdfff, lsl #48 8: 8b080294 add x20, x20, x8 c: d343fe88 lsr x8, x20, #3 * 10: 38756908 ldrb w8, [x8, x21] <-- trapping instruction --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup