linux-kernel - Re: [syzbot] [wpan?] WARNING in __dev_change_net

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Message-ID: <0000000000004a5da1062146fc27@google.com>
Date: Wed, 04 Sep 2024 01:30:24 -0700
From: syzbot <syzbot+1df6ffa7a6274ae264db@...kaller.appspotmail.com>
To: alex.aring@...il.com, davem@...emloft.net, edumazet@...gle.com, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, linux-wpan@...r.kernel.org, 
	miquel.raynal@...tlin.com, netdev@...r.kernel.org, pabeni@...hat.com, 
	stefan@...enfreihafen.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wpan?] WARNING in __dev_change_net_namespace (2)

syzbot has found a reproducer for the following issue on:

HEAD commit:    88fac17500f4 Merge tag 'fuse-fixes-6.11-rc7' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1547d653980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=660f6eb11f9c7dc5
dashboard link: https://syzkaller.appspot.com/bug?extid=1df6ffa7a6274ae264db
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=13bf3fdb980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-88fac175.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/de92cf928379/vmlinux-88fac175.xz
kernel image: https://storage.googleapis.com/syzbot-assets/253b0e12054b/bzImage-88fac175.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1df6ffa7a6274ae264db@...kaller.appspotmail.com

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f95c6735f80 R15: 00007ffd0db2c528
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5268 at net/core/dev.c:11568 __dev_change_net_namespace+0x171a/0x1830 net/core/dev.c:11568
Modules linked in:
CPU: 0 UID: 0 PID: 5268 Comm: syz.0.15 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #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:__dev_change_net_namespace+0x171a/0x1830 net/core/dev.c:11568
Code: 01 90 48 c7 c7 40 dc 0c 8d 48 c7 c6 20 dc 0c 8d ba c5 2c 00 00 e8 e6 d8 cb f7 90 0f 0b 90 90 e9 54 ea ff ff e8 a7 b4 09 f8 90 <0f> 0b 90 e9 4a fb ff ff e8 99 b4 09 f8 90 0f 0b 90 e9 d5 fe ff ff
RSP: 0018:ffffc90002456fc0 EFLAGS: 00010293
RAX: ffffffff8989d809 RBX: dffffc0000000000 RCX: ffff88801cbe2440
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: ffffc900024573f8 R08: ffffffff8989d349 R09: 1ffffffff283c909
R10: dffffc0000000000 R11: fffffbfff283c90a R12: ffff88803362c1b8
R13: ffff88803362cbf0 R14: ffff88803362c734 R15: 00000000fffffff4
FS:  00007f95c734f6c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5dd5ec6d6 CR3: 0000000011730000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dev_change_net_namespace include/linux/netdevice.h:3932 [inline]
 cfg802154_switch_netns+0xc8/0x390 net/ieee802154/core.c:230
 nl802154_wpan_phy_netns+0x13d/0x210 net/ieee802154/nl802154.c:1292
 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:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 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: 0033:0x7f95c657cef9
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:00007f95c734f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f95c6735f80 RCX: 00007f95c657cef9
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007f95c734f090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f95c6735f80 R15: 00007ffd0db2c528
 </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.