netdev - Re: [syzbot] [wireless?] WARNING in ieee80211_prep

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Message-ID: <67be8d2e.050a0220.38b081.0001.GAE@google.com>
Date: Tue, 25 Feb 2025 19:40:30 -0800
From: syzbot <syzbot+c90039fcfb40175abe28@...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_prep_channel

syzbot has found a reproducer for the following issue on:

HEAD commit:    2a1944bff549 Merge tag 'riscv-for-linus-6.14-rc5' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d61c98580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5b4c41bdaeea1964
dashboard link: https://syzkaller.appspot.com/bug?extid=c90039fcfb40175abe28
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=128877a4580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-2a1944bf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/55cab1eab779/vmlinux-2a1944bf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/54e689976766/bzImage-2a1944bf.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/58549eaf3f08/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c90039fcfb40175abe28@...kaller.appspotmail.com

wlan1: No basic rates, using min rate instead
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5621 at net/mac80211/mlme.c:1012 ieee80211_determine_chan_mode net/mac80211/mlme.c:1012 [inline]
WARNING: CPU: 0 PID: 5621 at net/mac80211/mlme.c:1012 ieee80211_prep_channel+0x389b/0x5120 net/mac80211/mlme.c:5666
Modules linked in:
CPU: 0 UID: 0 PID: 5621 Comm: syz.0.16 Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #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_determine_chan_mode net/mac80211/mlme.c:1012 [inline]
RIP: 0010:ieee80211_prep_channel+0x389b/0x5120 net/mac80211/mlme.c:5666
Code: c6 05 e7 7f 95 04 01 48 c7 c7 37 1c 4b 8d be 78 03 00 00 48 c7 c2 a0 1d 4b 8d e8 10 9f 0b f6 e9 7e ca ff ff e8 e6 44 30 f6 90 <0f> 0b 90 48 8b 7c 24 30 e8 58 fb 8b f6 48 c7 44 24 30 ea ff ff ff
RSP: 0018:ffffc90002d5e500 EFLAGS: 00010293
RAX: ffffffff8b91791a RBX: 0000000000000000 RCX: ffff88801f218000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002d5e850 R08: ffffffff8b914e39 R09: ffffffff8b601699
R10: 000000000000000e R11: ffff88801f218000 R12: dffffc0000000000
R13: ffff88804f53a758 R14: ffffc90002d5e710 R15: ffffc90002d5e750
FS:  00007f7858fdd6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a8f18b440 CR3: 0000000011d4c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_prep_connection+0xda1/0x1310 net/mac80211/mlme.c:8538
 ieee80211_mgd_auth+0xedb/0x1750 net/mac80211/mlme.c:8828
 rdev_auth net/wireless/rdev-ops.h:486 [inline]
 cfg80211_mlme_auth+0x59f/0x970 net/wireless/mlme.c:291
 cfg80211_conn_do_work+0x601/0xeb0 net/wireless/sme.c:183
 cfg80211_sme_connect net/wireless/sme.c:626 [inline]
 cfg80211_connect+0x190a/0x22f0 net/wireless/sme.c:1525
 nl80211_connect+0x19ec/0x2140 net/wireless/nl80211.c:12236
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xb1f/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x206/0x480 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+0x8de/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2659
 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: 0033:0x7f7859d8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7858fdd038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7859fa6080 RCX: 00007f7859d8d169
RDX: 0000000000000000 RSI: 00004000000001c0 RDI: 0000000000000009
RBP: 00007f7859e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7859fa6080 R15: 00007fffabdddad8
 </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.