From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (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 68B2F202F86 for ; Wed, 4 Dec 2024 14:29:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733322566; cv=none; b=BSEVxuOny7gK7ssB05JEvqJpfdyN2+tN8+dCaiKJSpmHQoU7N38TKwE1HVOQnWclMS6Ah6BOj4XRvG1ZgXqc1WkOL7Wr4FSosqBtyPG5hlCMufBPX7L0BfiVWrjNbHy5bUda3wCNUU2qcgUTd2ixo9948cJNKlsVQwy1CyLRL1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733322566; c=relaxed/simple; bh=LBwJ6bbAn80WcRPQJQHQ6y5sHV7eCBHAdt1sUqOU46E=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=KUop+oRaOH+0wdZvmlF7TZS1cA2Z63FM1E3DBd9rQ6z9JZXmUvNG+KdXCepb5A9/0G72vY2XI6P9YFVQaA71I3WC3u3FB3gUQwAzM6leoMItgFdXd9Ljk7kM0LOiwQaM+HNPClEQh6gfZZjW5QjPQaIlq+9GK3GGMeDdQ0erBK8= 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=209.85.166.78 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-io1-f78.google.com with SMTP id ca18e2360f4ac-8444dc6b982so86317839f.0 for ; Wed, 04 Dec 2024 06:29:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733322563; x=1733927363; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=lps44A56g0pBgvkO1wGgc43RH5tdrqdgb7gfd2Q29F0=; b=fwzgJFl8EvGxG3iY0vH1VSJDSrtHiB7seY4fTPJvtGjuGYlis7Hr5QYABh5zP44WVP phUw1MV8hlIKxaSd9b3H2848v00BH6aRhJJiLLaNBCCpTTzObmJ0yg5KoNyxFMn3Laxj yWa3flVsmU/iw8BRvsRxnOBDofowq31rRIs5TllJ9RJRAEIGlviBEh7O9xo0e98OoI4Q QgOKkqAQn/X6nYNtCYETNUzE3ZuZqP1TbAeAxiVGuyy4RefPObHuogNiFODtLZI6VJ07 x01cO1LAiR5NBaZrIpzM3sNM2SP7teeXdl3zVy2A+vLYlk0O66lif8tDfBIsFrWvFKRC yaAg== X-Forwarded-Encrypted: i=1; AJvYcCVb7FkhWHjEmtHy1z7RcWPxILz32WE11VcCoCxhTQn8h3d01iYtWttc31L2JNWTbyntqyHdVgs=@vger.kernel.org X-Gm-Message-State: AOJu0YzoYxi9Pkm+xLQdMS67EzhCu8lm4z/tpNk1MZReucDhYCmuKQ2f RNMMCmZz6MTq55vC8hL/FmvlBl79usxAhyHmuqnRrFQpZVB1jJ6C03/1eVomjoyAkNaN3nF9c9j dQuQ0yklMQe78sUW6KAYHVjnKzdp5EYj0S8LAsCmW1vuQaZ1rGug5/NA= X-Google-Smtp-Source: AGHT+IFgTcMnqnLEchm6AYwwlMmWF4Isq8kow0RtCBzKXE7/a4W57FGYAcZ5duqwr3yHAHmI484RZkACbVkF70/zKndsj9DHWhvU Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:cda4:0:b0:3a7:ca83:3f9 with SMTP id e9e14a558f8ab-3a7f9c1b5ddmr68369045ab.4.1733322563630; Wed, 04 Dec 2024 06:29:23 -0800 (PST) Date: Wed, 04 Dec 2024 06:29:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67506743.050a0220.17bd51.006e.GAE@google.com> Subject: [syzbot] [net?] BUG: unable to handle kernel paging request in dst_dev_put (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, 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: 7b1d1d4cfac0 Merge remote-tracking branch 'iommu/arm/smmu'.. 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=114ca75f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=dfe1e340fbee3d16 dashboard link: https://syzkaller.appspot.com/bug?extid=9911f8283beca191268b 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/354fe38e2935/disk-7b1d1d4c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f12e0b1ef3fd/vmlinux-7b1d1d4c.xz kernel image: https://storage.googleapis.com/syzbot-assets/291dbc519bb3/Image-7b1d1d4c.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9911f8283beca191268b@syzkaller.appspotmail.com Unable to handle kernel paging request at virtual address dfff800000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] 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 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : dst_dev_put+0x2c/0x2bc net/core/dst.c:146 lr : dst_dev_put+0x28/0x2bc net/core/dst.c:145 sp : ffff8000979379a0 x29: ffff8000979379a0 x28: ffffffffffffffff x27: ffff80008f16a000 x26: 1ffff00011e2d466 x25: dfff800000000000 x24: dfff800000000000 x23: 0000000000000000 x22: dfff800000000000 x21: ffff80008f821110 x20: 00007dfe9b881038 x19: 0000000000000002 x18: ffff0001b364a9a8 x17: 0000000000000040 x16: ffff800080585eb0 x15: 0000000000000001 x14: 1fffe0001df07cc3 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001df07cc4 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c19e5ac0 x7 : ffff8000832ff164 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800089f54340 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000002 Call trace: dst_dev_put+0x2c/0x2bc net/core/dst.c:146 (P) dst_dev_put+0x28/0x2bc net/core/dst.c:145 (L) rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:206 [inline] fib_nh_common_release+0x1f4/0x440 net/ipv4/fib_semantics.c:217 fib6_nh_release+0x3a0/0x40c net/ipv6/route.c:3668 fib6_info_destroy_rcu+0xc8/0x214 net/ipv6/ip6_fib.c:177 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0x898/0x1b5c kernel/rcu/tree.c:2823 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2840 handle_softirqs+0x2e0/0xbf8 kernel/softirq.c:554 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:949 smpboot_thread_fn+0x4b0/0x90c kernel/smpboot.c:164 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Code: aa0003f3 f2fbfff6 97a314b2 d343fe77 (38766ae8) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa0003f3 mov x19, x0 4: f2fbfff6 movk x22, #0xdfff, lsl #48 8: 97a314b2 bl 0xfffffffffe8c52d0 c: d343fe77 lsr x23, x19, #3 * 10: 38766ae8 ldrb w8, [x23, x22] <-- 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