[syzbot] [wireless?] WARNING in mac80211_hwsim_sta_rc_update

[syzbot] [wireless?] WARNING in mac80211_hwsim_sta_rc_update

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    6b466efc6365 dt-bindings: net: renesas-gbeth: Add support ..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1582e2f4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cc0c7bf6a7800c98
dashboard link: https://syzkaller.appspot.com/bug?extid=c0472dd80bb8f668625f
compiler:       Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0dc241e466cd/disk-6b466efc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5df43ce17ae4/vmlinux-6b466efc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7cb3cf08e099/bzImage-6b466efc.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c0472dd80bb8f668625f@syzkaller.appspotmail.com

netlink: 16 bytes leftover after parsing attributes in process `syz.0.682'.
------------[ cut here ]------------
intf 08:02:11:00:00:00 [link=0]: bad STA 08:02:11:00:00:01 bandwidth 20 MHz (0) > channel config 10 MHz (7)
WARNING: CPU: 0 PID: 8246 at drivers/net/wireless/virtual/mac80211_hwsim.c:2653 mac80211_hwsim_sta_rc_update+0x6f5/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2650
Modules linked in:
CPU: 0 UID: 0 PID: 8246 Comm: syz.0.682 Not tainted 6.15.0-rc5-syzkaller-01032-g6b466efc6365 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:mac80211_hwsim_sta_rc_update+0x6f5/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2650
Code: 71 17 00 00 48 c7 c7 60 f8 0b 8c 48 8b 74 24 28 89 ea 48 8b 4c 24 10 41 89 d8 45 89 f9 41 56 50 e8 90 48 9c fa 48 83 c4 10 90 <0f> 0b 90 90 e9 0c ff ff ff e8 2d ec d7 fa 90 0f 0b 90 e9 fe fe ff
RSP: 0018:ffffc90005156fb0 EFLAGS: 00010282
RAX: bdf3540220fb5200 RBX: 0000000000000014 RCX: 0000000000080000
RDX: ffffc9000d50e000 RSI: 0000000000005821 RDI: 0000000000005822
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba4b4 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000007 R15: 0000000000000000
FS:  00007f21ea3676c0(0000) GS:ffff8881260c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1e8181000 CR3: 000000002ff00000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mac80211_hwsim_sta_add+0xa3/0x310 drivers/net/wireless/virtual/mac80211_hwsim.c:2670
 drv_sta_add net/mac80211/driver-ops.h:466 [inline]
 drv_sta_state+0x8be/0x1840 net/mac80211/driver-ops.c:155
 sta_info_insert_drv_state net/mac80211/sta_info.c:775 [inline]
 sta_info_insert_finish net/mac80211/sta_info.c:883 [inline]
 sta_info_insert_rcu+0xd32/0x1940 net/mac80211/sta_info.c:960
 sta_info_insert+0x16/0xc0 net/mac80211/sta_info.c:965
 rdev_add_station+0x105/0x290 net/wireless/rdev-ops.h:201
 nl80211_new_station+0x1723/0x1b40 net/wireless/nl80211.c:7843
 genl_family_rcv_msg_doit+0x212/0x300 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x219/0x270 net/socket.c:727
 ____sys_sendmsg+0x505/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21e958e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f21ea367038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f21e97b6080 RCX: 00007f21e958e969
RDX: 0200000000000000 RSI: 0000200000001080 RDI: 0000000000000009
RBP: 00007f21e9610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f21e97b6080 R15: 00007ffd3178ff18
 </TASK>


---
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Re: [syzbot] [wireless?] WARNING in mac80211_hwsim_sta_rc_update

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    4c06e63b9203 Merge tag 'for-6.16-rc4-tag' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16f94582580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b29b1a0d7330d4a8
dashboard link: https://syzkaller.appspot.com/bug?extid=c0472dd80bb8f668625f
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13f66c8c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12497ebc580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-4c06e63b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ff61efc838cb/vmlinux-4c06e63b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/dea44d0d14bb/bzImage-4c06e63b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c0472dd80bb8f668625f@syzkaller.appspotmail.com

------------[ cut here ]------------
intf 08:02:11:00:00:01 [link=0]: bad STA 00:00:00:ff:ff:ff bandwidth 20 MHz (0) > channel config 10 MHz (7)
WARNING: CPU: 0 PID: 176 at drivers/net/wireless/virtual/mac80211_hwsim.c:2653 mac80211_hwsim_sta_rc_update+0x6f5/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2650
Modules linked in:
CPU: 0 UID: 0 PID: 176 Comm: kworker/u4:4 Not tainted 6.16.0-rc4-syzkaller-00123-g4c06e63b9203 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:mac80211_hwsim_sta_rc_update+0x6f5/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2650
Code: 71 17 00 00 48 c7 c7 c0 ae 2d 8c 48 8b 74 24 28 89 ea 48 8b 4c 24 10 41 89 d8 45 89 f9 41 56 50 e8 d0 df 8f fa 48 83 c4 10 90 <0f> 0b 90 90 e9 0c ff ff ff e8 2d 37 cc fa 90 0f 0b 90 e9 fe fe ff
RSP: 0018:ffffc90001a07768 EFLAGS: 00010282
RAX: 2b7aa56dabf85f00 RBX: 0000000000000014 RCX: ffff888000b5a440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88801fc24293 R09: 1ffff11003f84852
R10: dffffc0000000000 R11: ffffed1003f84853 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000007 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808d21c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffec31d80b8 CR3: 000000001216d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 mac80211_hwsim_sta_add+0xa3/0x310 drivers/net/wireless/virtual/mac80211_hwsim.c:2670
 drv_sta_add net/mac80211/driver-ops.h:466 [inline]
 drv_sta_state+0x8be/0x1840 net/mac80211/driver-ops.c:155
 sta_info_insert_drv_state net/mac80211/sta_info.c:775 [inline]
 sta_info_insert_finish net/mac80211/sta_info.c:883 [inline]
 sta_info_insert_rcu+0xd32/0x1940 net/mac80211/sta_info.c:960
 ieee80211_ocb_finish_sta net/mac80211/ocb.c:102 [inline]
 ieee80211_ocb_work+0x31f/0x580 net/mac80211/ocb.c:136
 cfg80211_wiphy_work+0x2df/0x460 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>


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#syz test: git://repo/address.git branch-or-commit-hash
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