syzbot

batman_adv: batadv0: Interface activated: team0
batman_adv: batadv0: Interface deactivated: team0
batman_adv: batadv0: Removing interface: team0
bridge0: port 1(team0) entered blocking state
bridge0: port 1(team0) entered disabled state
team0: entered allmulticast mode
net veth1_virt_wifi virt_wifi0: entered allmulticast mode
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:562
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 9105, name: syz.4.822
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
2 locks held by syz.4.822/9105:
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc4c/0x1d90 net/core/rtnetlink.c:4054
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781
CPU: 1 UID: 0 PID: 9105 Comm: syz.4.822 Not tainted 6.14.0-rc5-syzkaller-01183-g40587f749df2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8767
 __mutex_lock_common kernel/locking/mutex.c:562 [inline]
 __mutex_lock+0x126/0x1010 kernel/locking/mutex.c:730
 netdev_lock include/linux/netdevice.h:2731 [inline]
 netdev_lock_ops include/net/netdev_lock.h:40 [inline]
 dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279
 team_change_rx_flags+0x1a8/0x330 drivers/net/team/team_core.c:1789
 dev_change_rx_flags net/core/dev.c:9154 [inline]
 netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256
 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280
 br_add_if+0x317/0xef0 net/bridge/br_if.c:605
 do_set_master+0x579/0x730 net/core/rtnetlink.c:2943
 do_setlink+0xfee/0x40f0 net/core/rtnetlink.c:3149
 rtnl_changelink net/core/rtnetlink.c:3759 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
 rtnl_newlink+0x15a6/0x1d90 net/core/rtnetlink.c:4055
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6945
 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:709 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:724
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2564
 ___sys_sendmsg net/socket.c:2618 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2650
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57cd78d169
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:00007f57ce5aa038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f57cd9a6080 RCX: 00007f57cd78d169
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 000000000000000d
RBP: 00007f57cd80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f57cd9a6080 R15: 00007ffdff71b138
 </TASK>

=============================
[ BUG: Invalid wait context ]
6.14.0-rc5-syzkaller-01183-g40587f749df2 #0 Tainted: G        W         
-----------------------------
syz.4.822/9105 is trying to lock:
ffff88805cfc4d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
ffff88805cfc4d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline]
ffff88805cfc4d28 (&dev->lock){+.+.}-{4:4}, at: dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279
other info that might help us debug this:
context-{5:5}
2 locks held by syz.4.822/9105:
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc4c/0x1d90 net/core/rtnetlink.c:4054
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781
stack backtrace:
CPU: 1 UID: 0 PID: 9105 Comm: syz.4.822 Tainted: G        W          6.14.0-rc5-syzkaller-01183-g40587f749df2 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4828 [inline]
 check_wait_context kernel/locking/lockdep.c:4900 [inline]
 __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5178
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
 netdev_lock include/linux/netdevice.h:2731 [inline]
 netdev_lock_ops include/net/netdev_lock.h:40 [inline]
 dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279
 team_change_rx_flags+0x1a8/0x330 drivers/net/team/team_core.c:1789
 dev_change_rx_flags net/core/dev.c:9154 [inline]
 netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256
 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280
 br_add_if+0x317/0xef0 net/bridge/br_if.c:605
 do_set_master+0x579/0x730 net/core/rtnetlink.c:2943
 do_setlink+0xfee/0x40f0 net/core/rtnetlink.c:3149
 rtnl_changelink net/core/rtnetlink.c:3759 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
 rtnl_newlink+0x15a6/0x1d90 net/core/rtnetlink.c:4055
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6945
 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:709 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:724
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2564
 ___sys_sendmsg net/socket.c:2618 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2650
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57cd78d169
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:00007f57ce5aa038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f57cd9a6080 RCX: 00007f57cd78d169
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 000000000000000d
RBP: 00007f57cd80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f57cd9a6080 R15: 00007ffdff71b138
 </TASK>
netdevsim netdevsim4 netdevsim0: entered allmulticast mode