From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 5CA8C1D8E10 for ; Sun, 4 May 2025 16:41:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746376892; cv=none; b=iyW/WUodZOnRSnxVb8B4/HtHiSv7WFH8eEWGYHF2uaJMN8H2PDasScQyWlZnIngVOl2rnNaYIlNYSFa+fqty/WcfE0j0x8CZk0p+tC+Wp6jZyjBZQSzENhtzIlGrvhACiaFd7IIjXwFooe6roO4TW5Qsq/YGC5oApvUGGx0lpog= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746376892; c=relaxed/simple; bh=kIUoSPeRICPPvmJitOqBEIjVzlnGAWmggQxNwCLJQLk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Qz9WvnD97Rgjx3Gu4DsfIh5yilIcUmVbec9FFwG2N0+doJ12ckLuC+WMNy1d904wQr6k0TBProyoTdR6pdeaYheo11EaURW9rSZ9CaJZml6GQeAASJE0lgtJCLYRmDQRDrZSqf7wD8aQI6MwsCSeHIuaVOXHc39QRDjb7pVF9P4= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3d8a9b1c84eso47748815ab.2 for ; Sun, 04 May 2025 09:41:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746376889; x=1746981689; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=1y7mLr6LB7Kg0wjeAns0ppO15euW50CxesN3waBZcYw=; b=f12IZRmewb4GMojQ6INZJB9kE+2TQCSui0/BbKpVe4oQeVSD/4zp5VnhEcOLnbCNKQ Hcu01V0ZcZpSnqDKKZzr+uJDyV0P4qt4nY45FafjCNq8LJ12nI3DPKjFqhL159PQUWO2 K07XWz/A55lrYNKp4JgDg0ZIFEYEvcmKW9Bql6OG7UWzKCiYFNa8ikxtKqT/SOae3LRO ZIGuPc28VoBZ0Jcn3YO2kDQ9a90qN2DEvaL+8PhVn+9XrOYFkNd111jzbGImIoFuDt7b y2rN51D1JGZN2IXIaOlwUeoY+o7r9vaY3bQ85W6a71NdKWErBv9a8HqYwrXHrviRT5PU E6QQ== X-Forwarded-Encrypted: i=1; AJvYcCXX85l2f71tG6TfYr+EstZmOnhupicNtPy08Yj+yhOXsG6C2DZX8yCJyOC4qy+Ua+1QS0d4+gXooM56/fc=@vger.kernel.org X-Gm-Message-State: AOJu0Yw2AR3YziUdPAB9SzBalJ34tNZo1X+g/8rSbCrz7IZ0Bna2EDpV FV2Qw7bgqp29DKt/PVC+DN4JozfPM8Un8Sql+F7NyCfNvvpuIgyq6mo9zyVQfrRGwUKbYb1fUTU 5gvo9Pakut2LEtLaSKsW+twxRex87A/pme9Rp1VcRk4sZE2LZ4F3Ojh0= X-Google-Smtp-Source: AGHT+IH2mfTcU2xhZamann+fvbXzJfBSRHknCn9vWW10+/vvVzt14dkZ/XWiw1C4x2FlAH+ddznLf1tNaKuf70rLwpdE9E4gEcrD Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2147:b0:3d6:cbed:3305 with SMTP id e9e14a558f8ab-3da5b27501cmr35921425ab.10.1746376889493; Sun, 04 May 2025 09:41:29 -0700 (PDT) Date: Sun, 04 May 2025 09:41:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <681798b9.050a0220.11da1b.0032.GAE@google.com> Subject: [syzbot] [net?] KASAN: global-out-of-bounds Read in fib6_ifup From: syzbot To: davem@davemloft.net, dsahern@kernel.org, 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: 2a239ffbebb5 Merge tag 'sound-6.15-rc5' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12f8d8d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=541aa584278da96c dashboard link: https://syzkaller.appspot.com/bug?extid=0ea39a434b610c03f7ea compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9b278a43c30b/disk-2a239ffb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6643e08be3ea/vmlinux-2a239ffb.xz kernel image: https://storage.googleapis.com/syzbot-assets/c8acd8502009/bzImage-2a239ffb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0ea39a434b610c03f7ea@syzkaller.appspotmail.com tipc: Started in network mode tipc: Node identity 56b07f7dae81, cluster identity 4711 tipc: Enabled bearer , priority 0 syzkaller0: entered promiscuous mode syzkaller0: entered allmulticast mode ================================================================== BUG: KASAN: global-out-of-bounds in fib6_ifup+0x257/0x2a0 net/ipv6/route.c:4815 Read of size 8 at addr ffffffff9af9a530 by task syz.5.7046/29528 CPU: 0 UID: 0 PID: 29528 Comm: syz.5.7046 Not tainted 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 fib6_ifup+0x257/0x2a0 net/ipv6/route.c:4815 fib6_clean_node+0x2a4/0x5b0 net/ipv6/ip6_fib.c:2199 fib6_walk_continue+0x44f/0x8d0 net/ipv6/ip6_fib.c:2124 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2172 fib6_clean_tree+0xd4/0x110 net/ipv6/ip6_fib.c:2252 __fib6_clean_all+0x107/0x2d0 net/ipv6/ip6_fib.c:2268 rt6_sync_up+0xc9/0x170 net/ipv6/route.c:4837 addrconf_notify+0x73d/0x19e0 net/ipv6/addrconf.c:3748 notifier_call_chain+0xb9/0x410 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9405 netif_change_flags+0x108/0x160 net/core/dev.c:9434 dev_change_flags+0xba/0x250 net/core/dev_api.c:68 dev_ifsioc+0x1498/0x1f70 net/core/dev_ioctl.c:565 dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821 sock_do_ioctl+0x19d/0x280 net/socket.c:1204 sock_ioctl+0x227/0x6b0 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc72c38e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc72d1fc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc72c5b5fa0 RCX: 00007fc72c38e969 RDX: 0000200000002280 RSI: 0000000000008914 RDI: 0000000000000004 RBP: 00007fc72c410ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc72c5b5fa0 R15: 00007ffcaefaed28 The buggy address belongs to the variable: __key.0+0x30/0x40 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1af9a flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002000 ffffea00006be688 ffffea00006be688 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffffffff9af9a400: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 ffffffff9af9a480: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 >ffffffff9af9a500: 00 00 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 ^ ffffffff9af9a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f9 ffffffff9af9a600: f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9 00 00 f9 f9 ================================================================== --- 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