[syzbot] [wireless?] WARNING in mac80211_hwsim_tx (2)

[syzbot] [wireless?] WARNING in mac80211_hwsim_tx (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    adc1e5c6203c Merge tag 'efi-fixes-for-v7.1-1' of git://git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1369cd06580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=59da38148f3a3d24
dashboard link: https://syzkaller.appspot.com/bug?extid=435fdb053cf98bfa5778
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e1ec8b63537e/disk-adc1e5c6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2030fc4d0035/vmlinux-adc1e5c6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a50679f39f63/bzImage-adc1e5c6.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+435fdb053cf98bfa5778@syzkaller.appspotmail.com

------------[ cut here ]------------
sp->magic != HWSIM_STA_MAGIC
WARNING: drivers/net/wireless/virtual/mac80211_hwsim.c:265 at hwsim_check_sta_magic drivers/net/wireless/virtual/mac80211_hwsim.c:265 [inline], CPU#1: syz.3.8603/32057
WARNING: drivers/net/wireless/virtual/mac80211_hwsim.c:265 at hwsim_check_sta_magic drivers/net/wireless/virtual/mac80211_hwsim.c:262 [inline], CPU#1: syz.3.8603/32057
WARNING: drivers/net/wireless/virtual/mac80211_hwsim.c:265 at mac80211_hwsim_tx+0x2085/0x2b10 drivers/net/wireless/virtual/mac80211_hwsim.c:2213, CPU#1: syz.3.8603/32057
Modules linked in:
CPU: 1 UID: 0 PID: 32057 Comm: syz.3.8603 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:hwsim_check_sta_magic drivers/net/wireless/virtual/mac80211_hwsim.c:265 [inline]
RIP: 0010:hwsim_check_sta_magic drivers/net/wireless/virtual/mac80211_hwsim.c:262 [inline]
RIP: 0010:mac80211_hwsim_tx+0x2085/0x2b10 drivers/net/wireless/virtual/mac80211_hwsim.c:2213
Code: 44 24 20 e8 fd a6 dc fa 48 8d 3d a6 50 b8 09 48 8b 54 24 20 8b 74 24 30 89 d9 67 48 0f b9 3a e9 f7 ec ff ff e8 dc a6 dc fa 90 <0f> 0b 90 e9 a0 e3 ff ff e8 ce a6 dc fa 48 8d bb f1 07 00 00 48 b8
RSP: 0018:ffffc900040eeea0 EFLAGS: 00010283
RAX: 000000000000075e RBX: ffff888083a0eb78 RCX: ffffc90011de4000
RDX: 0000000000080000 RSI: ffffffff872bec44 RDI: ffff8880663e0000
RBP: 0000000000000000 R08: 0000000000000005 R09: 000000006d537749
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888067c460c0
R13: ffff888074694780 R14: ffff8880401231c0 R15: ffff888074694780
FS:  00007f439aedf6c0(0000) GS:ffff888124475000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003540 CR3: 000000003994c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drv_tx net/mac80211/driver-ops.h:38 [inline]
 ieee80211_tx_frags+0x5c9/0xa70 net/mac80211/tx.c:1746
 __ieee80211_tx+0x145/0x5b0 net/mac80211/tx.c:1801
 ieee80211_tx+0x336/0x460 net/mac80211/tx.c:1984
 ieee80211_xmit+0x30f/0x3e0 net/mac80211/tx.c:2076
 __ieee80211_tx_skb_tid_band+0x2c2/0x720 net/mac80211/tx.c:6369
 ieee80211_tx_skb_tid+0x1c1/0x550 net/mac80211/tx.c:6399
 ieee80211_mgmt_tx+0x1326/0x2590 net/mac80211/offchannel.c:1029
 rdev_mgmt_tx net/wireless/rdev-ops.h:767 [inline]
 cfg80211_mlme_mgmt_tx+0x803/0x1600 net/wireless/mlme.c:961
 nl80211_tx_mgmt+0x9f9/0xf30 net/wireless/nl80211.c:14358
 genl_family_rcv_msg_doit+0x214/0x300 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x560/0x800 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752
 __sys_sendmsg+0x170/0x220 net/socket.c:2784
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4399f9cdd9
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:00007f439aedf028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f439a216090 RCX: 00007f4399f9cdd9
RDX: 0000000028004800 RSI: 0000200000003740 RDI: 0000000000000003
RBP: 00007f439a032d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f439a216128 R14: 00007f439a216090 R15: 00007ffff74f7008
 </TASK>


---
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Re: [syzbot] [wireless?] WARNING in mac80211_hwsim_tx (2)

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    dc59e4fea9d8 Linux 7.2-rc1
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12f58032580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3c3d59be33cf7e9a
dashboard link: https://syzkaller.appspot.com/bug?extid=435fdb053cf98bfa5778
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13a73289580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=135db61e580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-dc59e4fe.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ee1f0ea24f2/vmlinux-dc59e4fe.xz
kernel image: https://storage.googleapis.com/syzbot-assets/729e963a1370/bzImage-dc59e4fe.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+435fdb053cf98bfa5778@syzkaller.appspotmail.com

mac80211_hwsim hwsim5 wlan1: entered allmulticast mode
------------[ cut here ]------------
hwsim_get_chanwidth(bw) > hwsim_get_chanwidth(confbw)
WARNING: drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248 at mac80211_hwsim_tx+0x1ab4/0x2500 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248, CPU#0: syz.0.17/5510
Modules linked in:
CPU: 0 UID: 0 PID: 5510 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:mac80211_hwsim_tx+0x1ab4/0x2500 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248
Code: c6 05 da 65 07 09 01 48 c7 c7 e0 74 7a 8c be 6b 08 00 00 48 c7 c2 20 76 7a 8c e8 a7 d6 8c fa e9 ff ee ff ff e8 7d eb b0 fa 90 <0f> 0b 90 49 bc 00 00 00 00 00 fc ff df e9 dd fe ff ff e8 65 eb b0
RSP: 0018:ffffc9000278efe0 EFLAGS: 00010293
RAX: ffffffff87158693 RBX: 0000000000000000 RCX: ffff888000ad8000
RDX: 0000000000000000 RSI: 0000000000000014 RDI: 00000000000000a0
RBP: ffffc9000278f170 R08: ffff888000ad8000 R09: 000000000000000e
R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000014
R13: ffff8880120b3cb0 R14: 00000000000000a0 R15: 0000000000000030
FS:  000055559073c500(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005562391e0138 CR3: 0000000012ea1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drv_tx net/mac80211/driver-ops.h:38 [inline]
 ieee80211_tx_frags+0x3df/0x890 net/mac80211/tx.c:1746
 __ieee80211_tx+0x267/0x580 net/mac80211/tx.c:1801
 ieee80211_tx+0x312/0x4b0 net/mac80211/tx.c:1984
 ieee80211_monitor_start_xmit+0xb33/0x1280 net/mac80211/tx.c:2479
 __netdev_start_xmit include/linux/netdevice.h:5400 [inline]
 netdev_start_xmit include/linux/netdevice.h:5409 [inline]
 xmit_one net/core/dev.c:3889 [inline]
 dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905
 __dev_queue_xmit+0x1435/0x37f0 net/core/dev.c:4872
 packet_snd net/packet/af_packet.c:3082 [inline]
 packet_sendmsg+0x3d95/0x5040 net/packet/af_packet.c:3114
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775
 __sock_sendmsg net/socket.c:790 [inline]
 __sys_sendto+0x408/0x5a0 net/socket.c:2252
 __do_sys_sendto net/socket.c:2259 [inline]
 __se_sys_sendto net/socket.c:2255 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2255
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc04219ce59
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:00007ffcb766be38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc042415fa0 RCX: 00007fc04219ce59
RDX: 0000000000000030 RSI: 0000200000000640 RDI: 0000000000000008
RBP: 00007fc042232e6f R08: 0000200000000380 R09: 0000000000000014
R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc042415fac R14: 00007fc042415fa0 R15: 00007fc042415fa0
 </TASK>


---
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