linux-kernel - [syzbot] [wireless?] WARNING in mac80211_hwsim

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Message-ID: <6761b965.050a0220.29fcd0.0072.GAE@google.com>
Date: Tue, 17 Dec 2024 09:48:21 -0800
From: syzbot <syzbot+433ee38d8684adcfbeb9@...kaller.appspotmail.com>
To: johannes@...solutions.net, kvalo@...nel.org, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wireless?] WARNING in mac80211_hwsim_tx

Hello,

syzbot found the following issue on:

HEAD commit:    429fde2d81bc net: tun: fix tun_napi_alloc_frags()
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=1017da0f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac
dashboard link: https://syzkaller.appspot.com/bug?extid=433ee38d8684adcfbeb9
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/34e1be018333/disk-429fde2d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ec564480cb6e/vmlinux-429fde2d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d9902c93ef5/bzImage-429fde2d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+433ee38d8684adcfbeb9@...kaller.appspotmail.com

------------[ cut here ]------------
Invalid VIF (ffff88807e14e9d0) magic 0x0, 08:02:11:00:00:01, 3/1
WARNING: CPU: 0 PID: 5908 at drivers/net/wireless/virtual/mac80211_hwsim.c:237 hwsim_check_magic drivers/net/wireless/virtual/mac80211_hwsim.c:235 [inline]
WARNING: CPU: 0 PID: 5908 at drivers/net/wireless/virtual/mac80211_hwsim.c:237 mac80211_hwsim_tx+0x1b6f/0x23c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2026
Modules linked in:
CPU: 0 UID: 0 PID: 5908 Comm: kworker/0:6 Not tainted 6.13.0-rc2-syzkaller-00131-g429fde2d81bc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: mld mld_ifc_work
RIP: 0010:hwsim_check_magic drivers/net/wireless/virtual/mac80211_hwsim.c:235 [inline]
RIP: 0010:mac80211_hwsim_tx+0x1b6f/0x23c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2026
Code: 28 84 c0 0f 85 06 08 00 00 45 0f b6 8e 61 04 00 00 48 c7 c7 40 2a a9 8c 4c 89 f6 44 89 e2 48 89 e9 41 89 d8 e8 52 e7 50 fa 90 <0f> 0b 90 90 e9 69 f2 ff ff e8 d3 3d 90 fa 90 0f 0b 90 e9 d5 f2 ff
RSP: 0018:ffffc9000479ebf0 EFLAGS: 00010246
RAX: 8672fc10cd8df200 RBX: 0000000000000003 RCX: ffff888031a21e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88807e14ee2a R08: ffffffff81600a42 R09: fffffbfff1cfa210
R10: dffffc0000000000 R11: fffffbfff1cfa210 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88807e14e9d0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48a26a56c0 CR3: 0000000061e5a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drv_tx net/mac80211/driver-ops.h:37 [inline]
 wake_tx_push_queue net/mac80211/util.c:298 [inline]
 ieee80211_handle_wake_tx_queue+0x1ae/0x2d0 net/mac80211/util.c:315
 drv_wake_tx_queue net/mac80211/driver-ops.h:1362 [inline]
 schedule_and_wake_txq net/mac80211/driver-ops.h:1369 [inline]
 ieee80211_queue_skb+0x1ae9/0x24b0 net/mac80211/tx.c:1664
 ieee80211_tx+0x2c4/0x470 net/mac80211/tx.c:1967
 __ieee80211_subif_start_xmit+0xe93/0x1600 net/mac80211/tx.c:4339
 ieee80211_subif_start_xmit+0xde/0x4d0 net/mac80211/tx.c:4533
 __netdev_start_xmit include/linux/netdevice.h:5002 [inline]
 netdev_start_xmit include/linux/netdevice.h:5011 [inline]
 xmit_one net/core/dev.c:3590 [inline]
 dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3606
 __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434
 neigh_output include/net/neighbour.h:539 [inline]
 ip6_finish_output2+0x12c7/0x17b0 net/ipv6/ip6_output.c:141
 ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226
 NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314
 mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1819
 mld_send_cr net/ipv6/mcast.c:2120 [inline]
 mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2651
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
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