bridge0: entered promiscuous mode team0: entered promiscuous mode bridge1: entered promiscuous mode batadv1: entered promiscuous mode vxlan0: 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: 4780, name: syz.1.6810 preempt_count: 201, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by syz.1.6810/4780: #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570 #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4071 #2: ffff888035df8370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4867 [inline] #2: ffff888035df8370 (&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: [] local_bh_disable include/linux/bottom_half.h:20 [inline] [] netif_addr_lock_bh include/linux/netdevice.h:4866 [inline] [] dev_uc_add+0x56/0x120 net/core/dev_addr_lists.c:689 CPU: 0 UID: 0 PID: 4780 Comm: syz.1.6810 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x378/0x4d0 kernel/sched/core.c:8884 __mutex_lock_common kernel/locking/mutex.c:591 [inline] __mutex_lock+0x119/0x1300 kernel/locking/mutex.c:776 netdev_lock include/linux/netdevice.h:2784 [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:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9609 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:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 __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:1702 __dev_change_flags+0x1f7/0x690 net/core/dev.c:9762 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 net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg+0x183/0x260 net/socket.c:2678 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc7f6c Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 90 90 90 90 90 90 b8 ad RSP: 002b:00000000f502150c EFLAGS: 00000206 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ============================= [ BUG: Invalid wait context ] syzkaller #0 Tainted: G W L ----------------------------- syz.1.6810/4780 is trying to lock: ffff888057b68d40 (&dev_instance_lock_key#24){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2784 [inline] ffff888057b68d40 (&dev_instance_lock_key#24){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline] ffff888057b68d40 (&dev_instance_lock_key#24){+.+.}-{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.1.6810/4780: #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff9011cac8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570 #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff8fbccd08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4071 #2: ffff888035df8370 (&dev_addr_list_lock_key#7/2){+...}-{3:3}, at: netif_addr_lock_bh include/linux/netdevice.h:4867 [inline] #2: ffff888035df8370 (&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: 0 UID: 0 PID: 4780 Comm: syz.1.6810 Tainted: G W L syzkaller #0 PREEMPT(full) Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: 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:2784 [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:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9609 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:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 __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:1702 __dev_change_flags+0x1f7/0x690 net/core/dev.c:9762 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 net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg+0x183/0x260 net/socket.c:2678 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc7f6c Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 90 90 90 90 90 90 b8 ad RSP: 002b:00000000f502150c EFLAGS: 00000206 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 netdevsim netdevsim1 netdevsim0: entered promiscuous mode batadv2: entered promiscuous mode bridge0: port 2(macvtap1) entered blocking state bridge0: port 2(macvtap1) entered disabled state macvtap1: entered allmulticast mode bridge0: entered allmulticast mode macvtap1: left allmulticast mode bridge0: left allmulticast mode bridge0: left promiscuous mode team0: left promiscuous mode bridge1: left promiscuous mode batadv1: left promiscuous mode vxlan0: 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: 4780, name: syz.1.6810 preempt_count: 201, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] local_bh_disable include/linux/bottom_half.h:20 [inline] [] netif_addr_lock_bh include/linux/netdevice.h:4866 [inline] [] dev_uc_del+0x56/0x110 net/core/dev_addr_lists.c:711 CPU: 1 UID: 0 PID: 4780 Comm: syz.1.6810 Tainted: G W L syzkaller #0 PREEMPT(full) Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x378/0x4d0 kernel/sched/core.c:8884 __mutex_lock_common kernel/locking/mutex.c:591 [inline] __mutex_lock+0x119/0x1300 kernel/locking/mutex.c:776 netdev_lock include/linux/netdevice.h:2784 [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:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9609 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 dev_change_rx_flags net/core/dev.c:9545 [inline] __dev_set_promiscuity+0x515/0x710 net/core/dev.c:9589 __dev_set_rx_mode+0x17c/0x260 net/core/dev.c:-1 dev_uc_del+0xc0/0x110 net/core/dev_addr_lists.c:715 macvlan_stop+0x259/0x3e0 drivers/net/macvlan.c:715 __dev_close_many+0x368/0x6d0 net/core/dev.c:1775 netif_close_many+0x225/0x420 net/core/dev.c:1800 unregister_netdevice_many_notify+0xb47/0x2370 net/core/dev.c:12382 rtnl_newlink_create+0x84b/0xb70 net/core/rtnetlink.c:3868 __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 net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg+0x183/0x260 net/socket.c:2678 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc7f6c Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 90 90 90 90 90 90 b8 ad RSP: 002b:00000000f502150c EFLAGS: 00000206 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 netdevsim netdevsim1 netdevsim0: left promiscuous mode batadv2: left promiscuous mode ---------------- Code disassembly (best guess): 0: 90 nop 1: 85 d2 test %edx,%edx 3: 74 0a je 0xf 5: 89 ce mov %ecx,%esi 7: 81 e6 ff 0f 00 00 and $0xfff,%esi d: 89 32 mov %esi,(%rdx) f: 85 c0 test %eax,%eax 11: 74 05 je 0x18 13: c1 e9 0c shr $0xc,%ecx 16: 89 08 mov %ecx,(%rax) 18: 31 c0 xor %eax,%eax 1a: 5e pop %rsi 1b: 5d pop %rbp 1c: c3 ret 1d: 90 nop 1e: 0f 1f 00 nopl (%rax) 21: 51 push %rcx 22: 52 push %rdx 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 ret 2e: 58 pop %rax 2f: b8 77 00 00 00 mov $0x77,%eax 34: cd 80 int $0x80 36: 0f 0b ud2 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: b8 .byte 0xb8 3f: ad lods %ds:(%rsi),%eax