Hello, syzbot found the following issue on: HEAD commit: c2568c8c Merge branch 'net-Constify-struct-genl_small_ops' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=16e2fb4d900000 kernel config: https://syzkaller.appspot.com/x/.config?x=1e6c5266df853ae dashboard link: https://syzkaller.appspot.com/bug?extid=be0e03ca215b06199629 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1790e83b900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111a5bc7900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+be0e03ca215b06199629@xxxxxxxxxxxxxxxxxxxxxxxxx netlink: 20 bytes leftover after parsing attributes in process `syz-executor823'. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6878 at net/mac80211/rate.c:281 ieee80211_check_rate_mask+0x1af/0x220 net/mac80211/rate.c:281 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6878 Comm: syz-executor823 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:ieee80211_check_rate_mask+0x1af/0x220 net/mac80211/rate.c:281 Code: 45 85 ff 0f 84 86 0c 00 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 bf 8c a1 f9 e8 ba 8c a1 f9 0f 0b eb e4 e8 b1 8c a1 f9 <0f> 0b eb db e8 e8 4f e3 f9 e9 f6 fe ff ff 48 89 ef e8 db 4f e3 f9 RSP: 0018:ffffc900055274b0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88808a7d0c00 RCX: ffffffff87d4fa14 RDX: ffff888091b2e000 RSI: ffffffff87d4faff RDI: 0000000000000005 RBP: 0000000000000000 R08: ffff88808a7d1e58 R09: ffff888091b2e900 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 00000000ffffffff R14: ffff88808a7d0c00 R15: 0000000000000000 ieee80211_change_bss+0x53c/0xc20 net/mac80211/cfg.c:2314 rdev_change_bss net/wireless/rdev-ops.h:394 [inline] nl80211_set_bss+0x76c/0xc70 net/wireless/nl80211.c:7009 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+0x15a/0x430 net/netlink/af_netlink.c:2489 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:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4419c9 Code: e8 dc 05 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 7b 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdbf57fbe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004419c9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000306e616c77 R08: 0000000000000000 R09: 0000002000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032 R13: 0000000000000000 R14: 000000000000000c R15: 0000000000000004 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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
