bridge0: entered promiscuous mode
vlan2: entered 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: 24623, name: syz.8.5341
preempt_count: 201, expected: 0
RCU nest depth: 0, expected: 0
3 locks held by syz.8.5341/24623:
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4071
 #2: ffff88807aaec380 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4882 [inline]
 #2: ffff88807aaec380 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: dev_uc_add+0x67/0x120 net/core/dev_addr_lists.c:689
Preemption disabled at:
[<ffffffff897f60e6>] local_bh_disable include/linux/bottom_half.h:20 [inline]
[<ffffffff897f60e6>] netif_addr_lock_bh include/linux/netdevice.h:4881 [inline]
[<ffffffff897f60e6>] dev_uc_add+0x56/0x120 net/core/dev_addr_lists.c:689
CPU: 1 UID: 0 PID: 24623 Comm: syz.8.5341 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x378/0x4d0 kernel/sched/core.c:8878
 __mutex_lock_common kernel/locking/mutex.c:591 [inline]
 __mutex_lock+0x119/0x1300 kernel/locking/mutex.c:776
 netdev_lock include/linux/netdevice.h:2789 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_promiscuity+0x10e/0x260 net/core/dev_api.c:286
 dev_change_rx_flags net/core/dev.c:9532 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9576
 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9596
 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:287
 br_port_set_promisc net/bridge/br_if.c:108 [inline]
 br_manage_promisc+0x180/0x560 net/bridge/br_if.c:157
 dev_change_rx_flags net/core/dev.c:9532 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9576
 __dev_set_rx_mode+0x17c/0x260 net/core/dev.c:-1
 dev_uc_add+0xc8/0x120 net/core/dev_addr_lists.c:693
 macvlan_open+0x446/0x8e0 drivers/net/macvlan.c:653
 __dev_open+0x44d/0x830 net/core/dev.c:1695
 __dev_change_flags+0x1f7/0x690 net/core/dev.c:9749
 rtnl_configure_link net/core/rtnetlink.c:3594 [inline]
 rtnl_newlink_create+0x587/0xb70 net/core/rtnetlink.c:3850
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 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+0x18f/0x1d0 net/socket.c:737
 __sock_sendmsg net/socket.c:752 [inline]
 ____sys_sendmsg+0x589/0x8c0 net/socket.c:2610
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2664
 __sys_sendmsg net/socket.c:2696 [inline]
 __do_sys_sendmsg net/socket.c:2701 [inline]
 __se_sys_sendmsg net/socket.c:2699 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2699
 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: 0033:0x7fa22719aeb9
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:00007fa227fd0028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa227415fa0 RCX: 00007fa22719aeb9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 000000000000000d
RBP: 00007fa227208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa227416038 R14: 00007fa227415fa0 R15: 00007ffe44aa4718
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W    L     
-----------------------------
syz.8.5341/24623 is trying to lock:
ffff888033a1cd50 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2789 [inline]
ffff888033a1cd50 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
ffff888033a1cd50 (&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}
3 locks held by syz.8.5341/24623:
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
 #0: ffffffff90114c18 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #1: ffffffff8fbc5fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4071
 #2: ffff88807aaec380 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4882 [inline]
 #2: ffff88807aaec380 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: dev_uc_add+0x67/0x120 net/core/dev_addr_lists.c:689
stack backtrace:
CPU: 1 UID: 0 PID: 24623 Comm: syz.8.5341 Tainted: G        W    L      syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:2789 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_promiscuity+0x10e/0x260 net/core/dev_api.c:286
 dev_change_rx_flags net/core/dev.c:9532 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9576
 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9596
 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:287
 br_port_set_promisc net/bridge/br_if.c:108 [inline]
 br_manage_promisc+0x180/0x560 net/bridge/br_if.c:157
 dev_change_rx_flags net/core/dev.c:9532 [inline]
 __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9576
 __dev_set_rx_mode+0x17c/0x260 net/core/dev.c:-1
 dev_uc_add+0xc8/0x120 net/core/dev_addr_lists.c:693
 macvlan_open+0x446/0x8e0 drivers/net/macvlan.c:653
 __dev_open+0x44d/0x830 net/core/dev.c:1695
 __dev_change_flags+0x1f7/0x690 net/core/dev.c:9749
 rtnl_configure_link net/core/rtnetlink.c:3594 [inline]
 rtnl_newlink_create+0x587/0xb70 net/core/rtnetlink.c:3850
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 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+0x18f/0x1d0 net/socket.c:737
 __sock_sendmsg net/socket.c:752 [inline]
 ____sys_sendmsg+0x589/0x8c0 net/socket.c:2610
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2664
 __sys_sendmsg net/socket.c:2696 [inline]
 __do_sys_sendmsg net/socket.c:2701 [inline]
 __se_sys_sendmsg net/socket.c:2699 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2699
 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: 0033:0x7fa22719aeb9
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:00007fa227fd0028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa227415fa0 RCX: 00007fa22719aeb9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 000000000000000d
RBP: 00007fa227208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa227416038 R14: 00007fa227415fa0 R15: 00007ffe44aa4718
 </TASK>
macvtap1: entered promiscuous mode
macvtap1: entered allmulticast mode
bridge0: entered allmulticast mode