Re: [syzbot] [wireless?] WARNING in cfg80211_wext_siwrate

[syzbot <syzbot+af177aa139efdd13a9da@syzkaller.appspotmail.com>]

syzbot has found a reproducer for the following issue on:

HEAD commit:    a13307e97d5c Merge tag 'bpf-fixes' of git://git.kernel.org..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=1186e149580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=aaf0da806f995318
dashboard link: https://syzkaller.appspot.com/bug?extid=af177aa139efdd13a9da
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1077e479580000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+af177aa139efdd13a9da@syzkaller.appspotmail.com

warning: `syz-executor384' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211
------------[ cut here ]------------
wlan3: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.h:884 at drv_set_bitrate_mask net/mac80211/driver-ops.h:884 [inline], CPU#1: syz-executor384/5956
WARNING: net/mac80211/driver-ops.h:884 at ieee80211_set_bitrate_mask+0x1034/0x1320 net/mac80211/cfg.c:4134, CPU#1: syz-executor384/5956
Modules linked in:
CPU: 1 UID: 0 PID: 5956 Comm: syz-executor384 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:drv_set_bitrate_mask net/mac80211/driver-ops.h:884 [inline]
RIP: 0010:ieee80211_set_bitrate_mask+0x1084/0x1320 net/mac80211/cfg.c:4134
Code: 20 01 00 00 48 85 c0 49 0f 44 ee 48 b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 0f 85 3b 01 00 00 41 8b 17 4c 89 ef 48 89 ee <67> 48 0f b9 3a e9 c3 fd ff ff e8 9d 71 82 f6 90 0f 0b 90 e9 41 fe
RSP: 0018:ffffc9000374f778 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100ff9eb25 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff88807fcf4120 RDI: ffffffff90698350
RBP: ffff88807fcf4120 R08: ffff888073d00faf R09: 1ffff1100e7a01f5
R10: dffffc0000000000 R11: ffffed100e7a01f6 R12: ffff888073d00740
R13: ffffffff90698350 R14: ffff88807fcf5938 R15: ffff88807fcf5928
FS:  000055555d18b400(0000) GS:ffff888125055000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0604dea286 CR3: 00000000784fe000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rdev_set_bitrate_mask net/wireless/rdev-ops.h:683 [inline]
 cfg80211_wext_siwrate+0x78d/0x9d0 net/wireless/wext-compat.c:1238
 ioctl_standard_call+0xc5/0x160 net/wireless/wext-core.c:1042
 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline]
 wext_ioctl_dispatch+0xee/0x410 net/wireless/wext-core.c:1013
 wext_handle_ioctl+0x110/0x1d0 net/wireless/wext-core.c:1074
 sock_ioctl+0x159/0x7e0 net/socket.c:1353
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 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: 0033:0x7f3f2a1ec9eb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fff6cea1560 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3f2a1ec9eb
RDX: 00007fff6cea15c0 RSI: 0000000000008b20 RDI: 0000000000000003
RBP: 00007fff6cea1640 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6cea15e0
R13: 00007f3f2a248aa1 R14: 00007f3f2a270cc0 R15: 0000000000000002
 </TASK>
----------------
Code disassembly (best guess):
   0:	20 01                	and    %al,(%rcx)
   2:	00 00                	add    %al,(%rax)
   4:	48 85 c0             	test   %rax,%rax
   7:	49 0f 44 ee          	cmove  %r14,%rbp
   b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  12:	fc ff df
  15:	0f b6 04 03          	movzbl (%rbx,%rax,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	0f 85 3b 01 00 00    	jne    0x15c
  21:	41 8b 17             	mov    (%r15),%edx
  24:	4c 89 ef             	mov    %r13,%rdi
  27:	48 89 ee             	mov    %rbp,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 c3 fd ff ff       	jmp    0xfffffdf7
  34:	e8 9d 71 82 f6       	call   0xf68271d6
  39:	90                   	nop
  3a:	0f 0b                	ud2
  3c:	90                   	nop
  3d:	e9                   	.byte 0xe9
  3e:	41                   	rex.B
  3f:	fe                   	.byte 0xfe


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