linux-kernel - Re: [syzbot] [wireless?] WARNING in ieee80211_tdls_build_mgmt_packet

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Message-ID: <67a4511d.050a0220.19061f.05f7.GAE@google.com>
Date: Wed, 05 Feb 2025 22:05:17 -0800
From: syzbot <syzbot+e55106f8389651870be0@...kaller.appspotmail.com>
To: johannes@...solutions.net, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] WARNING in ieee80211_tdls_build_mgmt_packet_data

syzbot has found a reproducer for the following issue on:

HEAD commit:    92514ef226f5 Merge tag 'for-6.14-rc1-tag' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=137124a4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1909f2f0d8e641ce
dashboard link: https://syzkaller.appspot.com/bug?extid=e55106f8389651870be0
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=167aadf8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=117aadf8580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-92514ef2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c4d8b91f8769/vmlinux-92514ef2.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c24ec4365966/bzImage-92514ef2.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e55106f8389651870be0@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5309 at net/mac80211/tdls.c:611 ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline]
WARNING: CPU: 0 PID: 5309 at net/mac80211/tdls.c:611 ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline]
WARNING: CPU: 0 PID: 5309 at net/mac80211/tdls.c:611 ieee80211_tdls_build_mgmt_packet_data+0x329c/0x4080 net/mac80211/tdls.c:984
Modules linked in:
CPU: 0 UID: 0 PID: 5309 Comm: syz-executor211 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline]
RIP: 0010:ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline]
RIP: 0010:ieee80211_tdls_build_mgmt_packet_data+0x329c/0x4080 net/mac80211/tdls.c:984
Code: f5 ff ff e8 06 49 3d f6 90 0f 0b 90 4c 8b 7c 24 10 e9 7e fe ff ff e8 f3 48 3d f6 90 0f 0b 90 e9 70 fe ff ff e8 e5 48 3d f6 90 <0f> 0b 90 e9 62 fe ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c c7
RSP: 0018:ffffc9000d2270c0 EFLAGS: 00010293
RAX: ffffffff8b82153b RBX: ffff888042af8d80 RCX: ffff888000ee8000
RDX: 0000000000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c608a00
RBP: ffffc9000d227260 R08: ffffffff901b5177 R09: 1ffffffff2036a2e
R10: dffffc0000000000 R11: fffffbfff2036a2f R12: dffffc0000000000
R13: 0000000000000017 R14: 0000000000000000 R15: ffff888041d91640
FS:  0000555566989380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000021c0 CR3: 000000004515a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_tdls_prep_mgmt_packet+0x3b6/0x860 net/mac80211/tdls.c:1058
 ieee80211_tdls_mgmt+0x8cf/0x10a0 net/mac80211/tdls.c:1299
 rdev_tdls_mgmt net/wireless/rdev-ops.h:927 [inline]
 nl80211_tdls_mgmt+0x4d8/0x770 net/wireless/nl80211.c:12537
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2568
 ___sys_sendmsg net/socket.c:2622 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2654
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1284b95c69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcdf2a63b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1284b95c69
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.