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@xxxxxxxxxxxxxxxxxxxxxxxxx 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> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
