syzbot

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: 23862, name: syz.4.4480
preempt_count: 201, expected: 0
RCU nest depth: 0, expected: 0
3 locks held by syz.4.4480/23862:
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:187 [inline]
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:294 [inline]
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x113/0x2c0 net/core/rtnetlink.c:574
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8bb/0x2380 net/core/rtnetlink.c:4071
 #2: ffff8880457dc370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4916 [inline]
 #2: ffff8880457dc370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: dev_uc_add+0x6f/0x110 net/core/dev_addr_lists.c:689
Preemption disabled at:
[<ffffffff8964f9f3>] local_bh_disable include/linux/bottom_half.h:20 [inline]
[<ffffffff8964f9f3>] netif_addr_lock_bh include/linux/netdevice.h:4915 [inline]
[<ffffffff8964f9f3>] dev_uc_add+0x63/0x110 net/core/dev_addr_lists.c:689
CPU: 0 UID: 0 PID: 23862 Comm: syz.4.4480 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:8885
 __mutex_lock_common kernel/locking/mutex.c:591 [inline]
 __mutex_lock+0x10e/0x1b90 kernel/locking/mutex.c:776
 netdev_lock include/linux/netdevice.h:2784 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 netdev_lock_ops include/net/netdev_lock.h:39 [inline]
 dev_set_promiscuity+0xa2/0x260 net/core/dev_api.c:286
 vlan_dev_change_rx_flags+0x123/0x150 net/8021q/vlan_dev.c:474
 dev_change_rx_flags net/core/dev.c:9547 [inline]
 __dev_set_promiscuity.cold+0x2eb/0x3c2 net/core/dev.c:9591
 netif_set_promiscuity+0x52/0x150 net/core/dev.c:9611
 dev_set_promiscuity+0xb2/0x260 net/core/dev_api.c:287
 br_port_set_promisc net/bridge/br_if.c:108 [inline]
 br_manage_promisc+0x2ce/0x500 net/bridge/br_if.c:157
 br_dev_change_rx_flags+0x40/0x50 net/bridge/br_device.c:186
 dev_change_rx_flags net/core/dev.c:9547 [inline]
 __dev_set_promiscuity.cold+0x2eb/0x3c2 net/core/dev.c:9591
 __dev_set_rx_mode+0x213/0x2e0 net/core/dev.c:9676
 dev_uc_add+0xee/0x110 net/core/dev_addr_lists.c:693
 macsec_dev_open+0xce/0x540 drivers/net/macsec.c:3557
 __dev_open+0x3ad/0x960 net/core/dev.c:1702
 __dev_change_flags+0x558/0x6f0 net/core/dev.c:9764
 rtnl_configure_link+0xfe/0x280 net/core/rtnetlink.c:3594
 rtnl_newlink_create net/core/rtnetlink.c:3850 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1536/0x2380 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2592
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2646
 __sys_sendmsg+0x170/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc37ff9c799
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:00007fc380e3f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc380216090 RCX: 00007fc37ff9c799
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000003
RBP: 00007fc380032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc380216128 R14: 00007fc380216090 R15: 00007fff6bfc1948
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W    L     
-----------------------------
syz.4.4480/23862 is trying to lock:
ffff88807b856d40 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2784 [inline]
ffff88807b856d40 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
ffff88807b856d40 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:39 [inline]
ffff88807b856d40 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: dev_set_promiscuity+0xa2/0x260 net/core/dev_api.c:286
other info that might help us debug this:
context-{5:5}
3 locks held by syz.4.4480/23862:
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:187 [inline]
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:294 [inline]
 #0: ffffffff90d9cea8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x113/0x2c0 net/core/rtnetlink.c:574
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #1: ffffffff906110a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8bb/0x2380 net/core/rtnetlink.c:4071
 #2: ffff8880457dc370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4916 [inline]
 #2: ffff8880457dc370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: dev_uc_add+0x6f/0x110 net/core/dev_addr_lists.c:689
stack backtrace:
CPU: 0 UID: 0 PID: 23862 Comm: syz.4.4480 Tainted: G        W    L      syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 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+0xfa4/0x2630 kernel/locking/lockdep.c:5187
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1cf/0x380 kernel/locking/lockdep.c:5825
 __mutex_lock_common kernel/locking/mutex.c:614 [inline]
 __mutex_lock+0x1a2/0x1b90 kernel/locking/mutex.c:776
 netdev_lock include/linux/netdevice.h:2784 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 netdev_lock_ops include/net/netdev_lock.h:39 [inline]
 dev_set_promiscuity+0xa2/0x260 net/core/dev_api.c:286
 vlan_dev_change_rx_flags+0x123/0x150 net/8021q/vlan_dev.c:474
 dev_change_rx_flags net/core/dev.c:9547 [inline]
 __dev_set_promiscuity.cold+0x2eb/0x3c2 net/core/dev.c:9591
 netif_set_promiscuity+0x52/0x150 net/core/dev.c:9611
 dev_set_promiscuity+0xb2/0x260 net/core/dev_api.c:287
 br_port_set_promisc net/bridge/br_if.c:108 [inline]
 br_manage_promisc+0x2ce/0x500 net/bridge/br_if.c:157
 br_dev_change_rx_flags+0x40/0x50 net/bridge/br_device.c:186
 dev_change_rx_flags net/core/dev.c:9547 [inline]
 __dev_set_promiscuity.cold+0x2eb/0x3c2 net/core/dev.c:9591
 __dev_set_rx_mode+0x213/0x2e0 net/core/dev.c:9676
 dev_uc_add+0xee/0x110 net/core/dev_addr_lists.c:693
 macsec_dev_open+0xce/0x540 drivers/net/macsec.c:3557
 __dev_open+0x3ad/0x960 net/core/dev.c:1702
 __dev_change_flags+0x558/0x6f0 net/core/dev.c:9764
 rtnl_configure_link+0xfe/0x280 net/core/rtnetlink.c:3594
 rtnl_newlink_create net/core/rtnetlink.c:3850 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1536/0x2380 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2592
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2646
 __sys_sendmsg+0x170/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc37ff9c799
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:00007fc380e3f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc380216090 RCX: 00007fc37ff9c799
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000003
RBP: 00007fc380032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc380216128 R14: 00007fc380216090 R15: 00007fff6bfc1948
 </TASK>
dummy0: entered promiscuous mode
macsec1: entered promiscuous mode