Hello, syzbot found the following issue on: HEAD commit: d1f3bdd4 net: dsa: rtl8366rb: standardize init jam tables git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=15d2308cd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b5f48fca2e44a9a2 dashboard link: https://syzkaller.appspot.com/bug?extid=ed107c5fa3e21cdcd86e compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1248bc54d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12174ad8d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ed107c5fa3e21cdcd86e@xxxxxxxxxxxxxxxxxxxxxxxxx netlink: 4 bytes leftover after parsing attributes in process `syz-executor171'. ------------[ cut here ]------------ RTNL: assertion failed at net/wireless/core.c (131) WARNING: CPU: 1 PID: 8485 at net/wireless/core.c:131 cfg80211_dev_rename+0x1f5/0x230 net/wireless/core.c:131 Modules linked in: CPU: 1 PID: 8485 Comm: syz-executor171 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cfg80211_dev_rename+0x1f5/0x230 net/wireless/core.c:131 Code: 0f 85 5b fe ff ff e8 ca 92 3e f9 ba 83 00 00 00 48 c7 c6 e0 52 61 8a 48 c7 c7 20 53 61 8a c6 05 df 5c bb 04 01 e8 88 05 86 00 <0f> 0b e9 30 fe ff ff e8 4f 70 81 f9 e9 4d fe ff ff e8 45 70 81 f9 RSP: 0018:ffffc900015ef488 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffc900015ef680 RCX: 0000000000000000 RDX: ffff888021490000 RSI: ffffffff815b6d25 RDI: fffff520002bde83 RBP: ffff88801b498000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815afefe R11: 0000000000000000 R12: 0000000000000000 R13: ffff888013a58420 R14: ffff88801b4ecbd0 R15: ffff88801b498000 FS: 0000000001f55880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faf23dcc000 CR3: 000000001c3ca000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nl80211_set_wiphy+0x22b/0x2b80 net/wireless/nl80211.c:3231 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x440a29 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 5b 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe71735868 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440a29 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402010 R13: 00000000004020a0 R14: 0000000000000000 R15: 0000000000000000 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
