linux-kernel - Re: [syzbot] [wireless?] WARNING in __cfg80211_connect

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Message-ID: <000000000000d13968061c59720f@google.com>
Date: Wed, 03 Jul 2024 08:26:04 -0700
From: syzbot <syzbot+d6eb9cee2885ec06f5e3@...kaller.appspotmail.com>
To: en-wei.wu@...onical.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] WARNING in __cfg80211_connect_result (2)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in cleanup_net

     create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
     unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
     ksys_unshare+0x619/0xc10 kernel/fork.c:3323
     __do_sys_unshare kernel/fork.c:3394 [inline]
     __se_sys_unshare kernel/fork.c:3392 [inline]
     __x64_sys_unshare+0x38/0x40 kernel/fork.c:3392
     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
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Modules linked in:
CPU: 1 PID: 11 Comm: kworker/u8:0 Not tainted 6.10.0-rc5-syzkaller-01200-gcda91d5b911a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: netns cleanup_net
RIP: 0010:ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Code: 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 88 f2 ab 06 eb 1a e8 f1 b7 ad fc 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 70 f2 ab 06 90 <0f> 0b 90 48 83 c3 44 48 89 df be 04 00 00 00 e8 5b 7f 13 fd 48 89
RSP: 0018:ffffc900001079e0 EFLAGS: 00010246
RAX: 2ba763440467a200 RBX: ffff8880296b9ed8 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: 0000000000000001
RBP: ffffc90000107ab0 R08: ffffffff92fbc66f R09: 1ffffffff25f78cd
R10: dffffc0000000000 R11: fffffbfff25f78ce R12: 1ffff1100da640d8
R13: dead000000000100 R14: ffff8880296b9f28 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b2700a0950 CR3: 000000002c8b0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:465 [inline]
 cleanup_net+0xbf3/0xcc0 net/core/net_namespace.c:661
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 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>


Tested on:

commit:         cda91d5b sctp: cancel a blocking accept when shutdown ..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10042266980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5264b58fdff6e881
dashboard link: https://syzkaller.appspot.com/bug?extid=d6eb9cee2885ec06f5e3
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1424c7ae980000