Subject: [syzbot] [net?] [wireless?] WARNING in ieee80211_bss_info_change_notify (2)

From: syzbot <[email-masked]>
Date: Thu, 12 Oct 2023 07:41:45 -0700

Hello,

syzbot found the following issue on:

HEAD commit:    401644852d0b Merge tag 'fs_for_v6.6-rc6' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=176b01ad680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=32d0b9b42ceb8b10
dashboard link: https://syzkaller.appspot.com/bug?extid=dd4779978217b1973180
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/94b84d66fc32/disk-40164485.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2a510b785da4/vmlinux-40164485.xz
kernel image: https://storage.googleapis.com/syzbot-assets/663b784d908b/bzImage-40164485.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

------------[ cut here ]------------
wlan1: Failed check-sdata-in-driver check, flags: 0x0
WARNING: CPU: 0 PID: 9044 at net/mac80211/main.c:236 ieee80211_bss_info_change_notify+0x2c9/0x820 net/mac80211/main.c:236
Modules linked in:
CPU: 0 PID: 9044 Comm: syz-executor.2 Not tainted 6.6.0-rc5-syzkaller-00072-g401644852d0b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:ieee80211_bss_info_change_notify+0x2c9/0x820 net/mac80211/main.c:236
Code: 00 00 e8 4a e3 d6 f7 48 8b 74 24 08 48 89 74 24 08 e8 3b e3 d6 f7 8b 14 24 48 c7 c7 c0 a2 c4 8b 48 8b 74 24 08 e8 87 0b 9d f7 <0f> 0b e8 20 e3 d6 f7 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900062472d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888020030c80 RCX: ffffc90003ec1000
RDX: 0000000000040000 RSI: ffffffff814df0c6 RDI: 0000000000000001
RBP: 0000000000000a00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888078ef8e20
R13: ffff8880200328b0 R14: ffff8880200315a0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f3ab40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f72646b0 CR3: 0000000020d94000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_ibss_disconnect+0x411/0x9d0 net/mac80211/ibss.c:726
 ieee80211_ibss_leave+0x16/0x160 net/mac80211/ibss.c:1872
 rdev_leave_ibss net/wireless/rdev-ops.h:569 [inline]
 __cfg80211_leave_ibss+0x1a2/0x410 net/wireless/ibss.c:210
 cfg80211_leave_ibss+0x59/0x80 net/wireless/ibss.c:228
 cfg80211_change_iface+0x457/0xdf0 net/wireless/util.c:1137
 nl80211_set_interface+0x708/0x9b0 net/wireless/nl80211.c:4222
 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:971
 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]
 genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1066
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2558
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2612
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2641
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f3f579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f3a5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi

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