netlink: 4 bytes leftover after parsing attributes in process `syz.4.1179'.
team0: left promiscuous mode
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:591
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 10002, name: syz.4.1179
preempt_count: 201, expected: 0
RCU nest depth: 0, expected: 0
2 locks held by syz.4.1179/10002:
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4093
 #1: ffff888033334e18 (&br->lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:347 [inline]
 #1: ffff888033334e18 (&br->lock){+.-.}-{3:3}, at: br_port_slave_changelink+0x3d/0x150 net/bridge/br_netlink.c:1212
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 10002 Comm: syz.4.1179 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x378/0x4d0 kernel/sched/core.c:8888
 __mutex_lock_common kernel/locking/mutex.c:591 [inline]
 __mutex_lock+0x119/0x1300 kernel/locking/mutex.c:776
 netdev_lock include/linux/netdevice.h:2785 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_promiscuity+0x10e/0x260 net/core/dev_api.c:286
 team_change_rx_flags+0x124/0x240 drivers/net/team/team_core.c:1738
 dev_change_rx_flags net/core/dev.c:9559 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9603
 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9623
 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:287
 br_port_clear_promisc net/bridge/br_if.c:135 [inline]
 br_manage_promisc+0x4db/0x560 net/bridge/br_if.c:172
 nbp_update_port_count net/bridge/br_if.c:242 [inline]
 br_port_flags_change+0x160/0x1f0 net/bridge/br_if.c:747
 br_setport+0xc0a/0x1680 net/bridge/br_netlink.c:1000
 br_port_slave_changelink+0x12f/0x150 net/bridge/br_netlink.c:1213
 rtnl_changelink net/core/rtnetlink.c:3791 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1924/0x1be0 net/core/rtnetlink.c:4094
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6980
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2592
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a8b59c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1a897ee028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1a8b815fa0 RCX: 00007f1a8b59c799
RDX: 0000000000004040 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007f1a8b632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a8b816038 R14: 00007f1a8b815fa0 R15: 00007ffc26b60b58
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W          
-----------------------------
syz.4.1179/10002 is trying to lock:
ffff88807fadad88 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2785 [inline]
ffff88807fadad88 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
ffff88807fadad88 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: dev_set_promiscuity+0x10e/0x260 net/core/dev_api.c:286
other info that might help us debug this:
context-{5:5}
2 locks held by syz.4.1179/10002:
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8fbcf1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4093
 #1: ffff888033334e18 (&br->lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:347 [inline]
 #1: ffff888033334e18 (&br->lock){+.-.}-{3:3}, at: br_port_slave_changelink+0x3d/0x150 net/bridge/br_netlink.c:1212
stack backtrace:
CPU: 0 UID: 0 PID: 10002 Comm: syz.4.1179 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline]
 check_wait_context kernel/locking/lockdep.c:4902 [inline]
 __lock_acquire+0xec1/0x2cf0 kernel/locking/lockdep.c:5187
 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/mutex.c:614 [inline]
 __mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776
 netdev_lock include/linux/netdevice.h:2785 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_promiscuity+0x10e/0x260 net/core/dev_api.c:286
 team_change_rx_flags+0x124/0x240 drivers/net/team/team_core.c:1738
 dev_change_rx_flags net/core/dev.c:9559 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9603
 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9623
 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:287
 br_port_clear_promisc net/bridge/br_if.c:135 [inline]
 br_manage_promisc+0x4db/0x560 net/bridge/br_if.c:172
 nbp_update_port_count net/bridge/br_if.c:242 [inline]
 br_port_flags_change+0x160/0x1f0 net/bridge/br_if.c:747
 br_setport+0xc0a/0x1680 net/bridge/br_netlink.c:1000
 br_port_slave_changelink+0x12f/0x150 net/bridge/br_netlink.c:1213
 rtnl_changelink net/core/rtnetlink.c:3791 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1924/0x1be0 net/core/rtnetlink.c:4094
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6980
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2592
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a8b59c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1a897ee028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1a8b815fa0 RCX: 00007f1a8b59c799
RDX: 0000000000004040 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007f1a8b632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a8b816038 R14: 00007f1a8b815fa0 R15: 00007ffc26b60b58
 </TASK>