[v5.15] WARNING in kcov_remote_start (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3330a8d33e08 Linux 5.15.201
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11294d5a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=31fb1b78fb8148d34bef
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/805fe5d5059e/disk-3330a8d3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/27b51f6fcd64/vmlinux-3330a8d3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c9998071ec80/bzImage-3330a8d3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+31fb1b...@syzkaller.appspotmail.com

netlink: 'syz.4.6851': attribute type 10 has an invalid length.
team0: Device wlan1 is of different type
------------[ cut here ]------------
WARNING: CPU: 1 PID: 27926 at kernel/kcov.c:844 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
WARNING: CPU: 1 PID: 27926 at kernel/kcov.c:844 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
WARNING: CPU: 1 PID: 27926 at kernel/kcov.c:844 refcount_dec_and_test include/linux/refcount.h:333 [inline]
WARNING: CPU: 1 PID: 27926 at kernel/kcov.c:844 kcov_put kernel/kcov.c:415 [inline]
WARNING: CPU: 1 PID: 27926 at kernel/kcov.c:844 kcov_remote_start+0x368/0x4a0 kernel/kcov.c:888
Modules linked in:
CPU: 1 PID: 27926 Comm: syz.4.6851 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:kcov_remote_start+0x368/0x4a0 kernel/kcov.c:844
Code: e8 bd ac 39 00 4c 89 ff e8 75 6b 44 00 e9 d7 fc ff ff 0f 8d d1 fc ff ff 4c 89 ff be 03 00 00 00 e8 1d 9b 6a 02 e9 bf fc ff ff <0f> 0b 41 f7 c6 00 02 00 00 74 05 e8 e8 20 06 00 48 c7 04 24 00 00
RSP: 0018:ffffc9000307e038 EFLAGS: 00010002
RAX: 0000000080000200 RBX: ffff88805d6fbb80 RCX: 0000000000000002
RDX: ffffc900144e5000 RSI: 000000000005d2e2 RDI: 000000000005d2e3
RBP: ffffc9000307e290 R08: ffff88805d6fbb80 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000002 R12: ffff88805f7d43c0
R13: 1ffff1100befa892 R14: 0000000000000246 R15: 0000000000000000
FS: 00007fa899d746c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31711ff8 CR3: 000000005db9b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
<TASK>
kcov_remote_start_common include/linux/kcov.h:50 [inline]
ieee80211_rx_list+0x620/0x2790 net/mac80211/rx.c:4977
ieee80211_rx_napi+0x178/0x390 net/mac80211/rx.c:5018
ieee80211_rx include/net/mac80211.h:4573 [inline]
ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:237
ieee80211_stop_device+0x16/0x80 net/mac80211/util.c:2150
ieee80211_do_stop+0x165b/0x1d40 net/mac80211/iface.c:639
ieee80211_stop+0x127/0x190 net/mac80211/iface.c:667
__dev_close_many+0x1d3/0x2b0 net/core/dev.c:1634
dev_close_many+0x21f/0x400 net/core/dev.c:1659
dev_close+0x154/0x210 net/core/dev.c:1685
team_port_add drivers/net/team/team.c:1324 [inline]
team_add_slave+0x178e/0x2780 drivers/net/team/team.c:1997
do_set_master net/core/rtnetlink.c:2577 [inline]
do_setlink+0xe90/0x3d60 net/core/rtnetlink.c:2788
__rtnl_newlink net/core/rtnetlink.c:3452 [inline]
rtnl_newlink+0x1658/0x1a50 net/core/rtnetlink.c:3574
rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5684
netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:706 [inline]
__sock_sendmsg net/socket.c:718 [inline]
____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445
___sys_sendmsg+0x236/0x2e0 net/socket.c:2499
__sys_sendmsg net/socket.c:2528 [inline]
__do_sys_sendmsg net/socket.c:2537 [inline]
__se_sys_sendmsg+0x1af/0x290 net/socket.c:2535
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa89bb3b629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa899d74028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa89bdb5090 RCX: 00007fa89bb3b629
RDX: 0000000000000000 RSI: 0000200000000600 RDI: 000000000000000c
RBP: 00007fa89bbd1b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa89bdb5128 R14: 00007fa89bdb5090 R15: 00007ffe296eae18
</TASK>


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