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Thu, 17 Aug 2023 06:00:40 -0700 (PDT) Date: Thu, 17 Aug 2023 06:00:40 -0700 In-Reply-To: <20230817111049.1936-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c808a206031dfffc@google.com> Subject: Re: [syzbot] [net?] WARNING in dev_index_reserve From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in dev_index_reserve netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5446 at net/core/dev.c:9593 dev_index_reserve+0x1a2/0x1c0 net/core/dev.c:9593 Modules linked in: CPU: 1 PID: 5446 Comm: syz-executor.0 Not tainted 6.5.0-rc5-syzkaller-01605-g950fe35831af-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:dev_index_reserve+0x1a2/0x1c0 net/core/dev.c:9593 Code: 00 31 d2 4d 8d 45 50 b9 ff ff ff 7f 48 8d 74 24 20 e8 f2 05 02 02 4c 89 e7 89 c3 e8 48 01 11 02 e9 48 ff ff ff e8 5e 1a 5e f9 <0f> 0b bb ea ff ff ff e9 52 ff ff ff e8 cd 4f 0d 02 66 66 2e 0f 1f RSP: 0018:ffffc90005a4efa8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000 RDX: ffff888028b83b80 RSI: ffffffff88280632 RDI: 0000000000000005 RBP: 1ffff92000b49df5 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffffff R11: ffffffff8a40008b R12: ffff88802c1f6010 R13: ffff88807bd89d40 R14: ffff88802c1f6000 R15: ffff88802c1f60f8 FS: 00007ffad37b86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000002c10f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_netdevice+0x69a/0x1490 net/core/dev.c:10081 veth_newlink+0x521/0xa50 drivers/net/veth.c:1938 rtnl_newlink_create net/core/rtnetlink.c:3475 [inline] __rtnl_newlink+0x115e/0x18c0 net/core/rtnetlink.c:3692 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3705 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6431 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:728 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:751 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2514 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2568 __sys_sendmsg+0x117/0x1e0 net/socket.c:2597 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffad2a7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffad37b80c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffad2b9bf80 RCX: 00007ffad2a7cae9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007ffad2ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ffad2b9bf80 R15: 00007ffc858ed2f8 Tested on: commit: 950fe358 Merge branch 'ipv6-expired-routes' git tree: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git console output: https://syzkaller.appspot.com/x/log.txt?x=1341e265a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=fe63ad15dded26b6 dashboard link: https://syzkaller.appspot.com/bug?extid=5ba06978f34abb058571 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1224279ba80000