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SubjectWARNING in wiphy_register (3)
From
Hello,

syzbot found the following crash on:

HEAD commit: 90cadbbf341d Merge git://git.kernel.org/pub/scm/linux/kern..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17053c9b400000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d41c8529d7e7362
dashboard link: https://syzkaller.appspot.com/bug?extid=73fd8b0aa60c67fa4b60
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17211a57400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+73fd8b0aa60c67fa4b60@syzkaller.appspotmail.com

IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
netlink: 'syz-executor4': attribute type 23 has an invalid length.
WARNING: CPU: 0 PID: 9553 at net/wireless/core.c:581
wiphy_verify_combinations net/wireless/core.c:581 [inline]
WARNING: CPU: 0 PID: 9553 at net/wireless/core.c:581
wiphy_register+0x147e/0x28d0 net/wireless/core.c:784
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9553 Comm: syz-executor4 Not tainted 4.20.0-rc7+ #360
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+0x1d3/0x2c6 lib/dump_stack.c:113
panic+0x2ad/0x55c kernel/panic.c:188
__warn.cold.8+0x20/0x45 kernel/panic.c:540
report_bug+0x254/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:wiphy_verify_combinations net/wireless/core.c:581 [inline]
RIP: 0010:wiphy_register+0x147e/0x28d0 net/wireless/core.c:784
Code: f0 ff ff e8 74 30 2b fa 0f 0b bb ea ff ff ff e9 10 f0 ff ff e8 63 30
2b fa 0f 0b bb ea ff ff ff e9 ff ef ff ff e8 52 30 2b fa <0f> 0b bb ea ff
ff ff e9 ee ef ff ff e8 41 30 2b fa 0f 0b bb ea ff
kobject: 'loop1' (00000000a0078c7e): kobject_uevent_env
RSP: 0018:ffff8881d798edb0 EFLAGS: 00010293
RAX: ffff8881cd55e040 RBX: 0000000000000001 RCX: ffffffff8753236b
RDX: 0000000000000000 RSI: ffffffff8753292e RDI: 0000000000000001
RBP: ffff8881d798ef38 R08: ffff8881cd55e040 R09: ffffed103a4a0680
R10: ffffed103a4a0680 R11: ffff8881d2503405 R12: 000000000000002f
R13: ffffffff88f0ba60 R14: ffff8881d2505e74 R15: 0000000000000000
kobject: 'loop1' (00000000a0078c7e): fill_kobj_path: path
= '/devices/virtual/block/loop1'
ieee80211_register_hw+0x15cd/0x40e0 net/mac80211/main.c:1109
mac80211_hwsim_new_radio+0x2025/0x3630
drivers/net/wireless/mac80211_hwsim.c:2921
kobject: 'loop5' (000000003dbebf8f): kobject_uevent_env
kobject: 'loop5' (000000003dbebf8f): fill_kobj_path: path
= '/devices/virtual/block/loop5'
hwsim_new_radio_nl+0xd3a/0x14b0 drivers/net/wireless/mac80211_hwsim.c:3469
genl_family_rcv_msg+0x8a7/0x11a0 net/netlink/genetlink.c:601
genl_rcv_msg+0xc6/0x168 net/netlink/genetlink.c:626
netlink_rcv_skb+0x16c/0x430 net/netlink/af_netlink.c:2477
genl_rcv+0x28/0x40 net/netlink/genetlink.c:637
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x59f/0x750 net/netlink/af_netlink.c:1336
netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xd5/0x120 net/socket.c:631
___sys_sendmsg+0x7fd/0x930 net/socket.c:2116
__sys_sendmsg+0x11d/0x280 net/socket.c:2154
__do_sys_sendmsg net/socket.c:2163 [inline]
__se_sys_sendmsg net/socket.c:2161 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457759
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3a2a64fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457759
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3a2a6506d4
R13: 00000000004c49c9 R14: 00000000004d80a0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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