Re: [syzbot] [wireless?] WARNING in ieee80211_set_active_links (3)

[syzbot <syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com>]

syzbot has found a reproducer for the following issue on:

HEAD commit:    3aa1dcaa4f6f Revert "wifi: mt76: Disable napi when removin..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11f09c79580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307
dashboard link: https://syzkaller.appspot.com/bug?extid=582469b3a9ef5f13606b
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15747225580000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com

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sta0: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.h:1723 at drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline], CPU#0: kworker/u33:4/93
WARNING: net/mac80211/driver-ops.h:1723 at ieee80211_set_active_links+0x2d0/0x970 net/mac80211/link.c:651, CPU#0: kworker/u33:4/93
Modules linked in:
CPU: 0 UID: 0 PID: 93 Comm: kworker/u33:4 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
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline]
RIP: 0010:ieee80211_set_active_links+0x2d7/0x970 net/mac80211/link.c:651
Code: 05 00 00 e8 5b de da f6 48 8b 34 24 48 81 c6 20 01 00 00 48 89 34 24 e8 47 de da f6 48 8d 3d e0 87 03 06 48 8b 34 24 44 89 fa <67> 48 0f b9 3a e9 e0 fe ff ff e8 2a de da f6 0f b7 c5 4c 8d bb 50
RSP: 0018:ffffc9000165faf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888038876c70 RCX: ffffffff8b2f94de
RDX: 0000000000000000 RSI: ffff888038874120 RDI: ffffffff91331d20
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888038875928
R13: 0000000000000000 R14: ffff888101a90f40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880d5de9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562bad7c5000 CR3: 000000000e994000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ieee80211_if_parse_active_links+0xbb/0x120 net/mac80211/debugfs_netdev.c:732
 wiphy_locked_debugfs_write_work+0xe6/0x1c0 net/wireless/debugfs.c:248
 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	e8 5b de da f6       	call   0xf6dade62
   7:	48 8b 34 24          	mov    (%rsp),%rsi
   b:	48 81 c6 20 01 00 00 	add    $0x120,%rsi
  12:	48 89 34 24          	mov    %rsi,(%rsp)
  16:	e8 47 de da f6       	call   0xf6dade62
  1b:	48 8d 3d e0 87 03 06 	lea    0x60387e0(%rip),%rdi        # 0x6038802
  22:	48 8b 34 24          	mov    (%rsp),%rsi
  26:	44 89 fa             	mov    %r15d,%edx
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	e9 e0 fe ff ff       	jmp    0xffffff13
  33:	e8 2a de da f6       	call   0xf6dade62
  38:	0f b7 c5             	movzwl %bp,%eax
  3b:	4c                   	rex.WR
  3c:	8d                   	.byte 0x8d
  3d:	bb                   	.byte 0xbb
  3e:	50                   	push   %rax


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