Message-ID: <68b54db1.a70a0220.1c57d1.0545.GAE@google.com>
Date: Mon, 01 Sep 2025 00:39:29 -0700
From: syzbot <syzbot+7932fb418f81bda3ad79@...kaller.appspotmail.com>
To: alex.aring@...il.com, andrew+netdev@...n.ch, 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: [syzbot] [wpan?] WARNING: ODEBUG bug in hwsim_update_pib

Hello,

syzbot found the following issue on:

HEAD commit:    bd2902e0bcac Merge branch 'locking-fixes-for-fbnic-driver'
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=117a1fbc580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=292f3bc9f654adeb
dashboard link: https://syzkaller.appspot.com/bug?extid=7932fb418f81bda3ad79
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/866cb9f09108/disk-bd2902e0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/05ea2ff5b4f0/vmlinux-bd2902e0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6b499ed83474/bzImage-bd2902e0.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7932fb418f81bda3ad79@...kaller.appspotmail.com

bond2: left promiscuous mode
8021q: adding VLAN 0 to HW filter on device bond2
8021q: adding VLAN 0 to HW filter on device bond3
8021q: adding VLAN 0 to HW filter on device bond4
------------[ cut here ]------------
ODEBUG: activate active (active state 1) object: ffff8880294fa980 object type: rcu_head hint: 0x0
WARNING: CPU: 1 PID: 13092 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 13092 Comm: syz.2.2163 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 97 e8 52 fd 4d 8b 0f 48 c7 c7 20 40 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 1e b3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 8a d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000e17e5f0 EFLAGS: 00010296
RAX: cf70889cbb35c600 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000c66a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: 0000000000000000
R13: ffffffff8be341a0 R14: ffff8880294fa980 R15: ffffffff8b8bd3a0
FS:  00007fa46bd396c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25865f1f98 CR3: 0000000075ad6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 debug_object_activate+0x26a/0x420 lib/debugobjects.c:842
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 kvfree_call_rcu+0x4f/0x410 mm/slab_common.c:1953
 hwsim_update_pib+0x2d2/0x450 drivers/net/ieee802154/mac802154_hwsim.c:116
 hwsim_set_promiscuous_mode+0x196/0x2e0 drivers/net/ieee802154/mac802154_hwsim.c:323
 drv_set_promiscuous_mode+0x16a/0x2f0 net/mac802154/driver-ops.h:127
 drv_start net/mac802154/driver-ops.h:195 [inline]
 mac802154_slave_open net/mac802154/iface.c:196 [inline]
 mac802154_wpan_open+0x17e7/0x2a40 net/mac802154/iface.c:295
 __dev_open+0x470/0x880 net/core/dev.c:1682
 __dev_change_flags+0x1ea/0x6d0 net/core/dev.c:9549
 netif_change_flags+0x88/0x1a0 net/core/dev.c:9612
 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3143
 rtnl_group_changelink net/core/rtnetlink.c:3775 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3929 [inline]
 rtnl_newlink+0x149f/0x1c70 net/core/rtnetlink.c:4057
 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6946
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 ____sys_sendmsg+0x505/0x830 net/socket.c:2614
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
 __sys_sendmsg net/socket.c:2700 [inline]
 __do_sys_sendmsg net/socket.c:2705 [inline]
 __se_sys_sendmsg net/socket.c:2703 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa46af8ebe9
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:00007fa46bd39038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa46b1b5fa0 RCX: 00007fa46af8ebe9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000006
RBP: 00007fa46b011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa46b1b6038 R14: 00007fa46b1b5fa0 R15: 00007ffcd9bf4da8
 </TASK>


---
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