syzbot

BUG: sleeping function called from invalid context at kernel/locking/mutex.c:578
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 8789, name: syz.4.993
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
2 locks held by syz.4.993/8789:
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4064
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781
CPU: 0 UID: 0 PID: 8789 Comm: syz.4.993 Not tainted 6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 __might_resched+0x495/0x610 kernel/sched/core.c:8818
 __mutex_lock_common kernel/locking/mutex.c:578 [inline]
 __mutex_lock+0x106/0xe80 kernel/locking/mutex.c:746
 netdev_lock include/linux/netdevice.h:2751 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_allmulti+0x10e/0x260 net/core/dev_api.c:311
 team_change_rx_flags+0x20f/0x330 drivers/net/team/team_core.c:1789
 dev_change_rx_flags net/core/dev.c:9145 [inline]
 netif_set_allmulti+0x20f/0x380 net/core/dev.c:9235
 __dev_change_flags+0x52e/0x6d0 net/core/dev.c:9376
 netif_change_flags+0x88/0x1a0 net/core/dev.c:9417
 do_setlink+0xcb9/0x40d0 net/core/rtnetlink.c:3152
 rtnl_group_changelink net/core/rtnetlink.c:3783 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3937 [inline]
 rtnl_newlink+0x149f/0x1c70 net/core/rtnetlink.c:4065
 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6955
 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x219/0x270 net/socket.c:727
 ____sys_sendmsg+0x505/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c24d8e969
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:00007f7c25b69038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c24fb6160 RCX: 00007f7c24d8e969
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000007
RBP: 00007f7c24e10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7c24fb6160 R15: 00007f7c250dfa28
 </TASK>

=============================
[ BUG: Invalid wait context ]
6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 Tainted: G        W          
-----------------------------
syz.4.993/8789 is trying to lock:
ffff88807966ad30 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2751 [inline]
ffff88807966ad30 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
ffff88807966ad30 (&dev_instance_lock_key#3){+.+.}-{4:4}, at: dev_set_allmulti+0x10e/0x260 net/core/dev_api.c:311
other info that might help us debug this:
context-{5:5}
2 locks held by syz.4.993/8789:
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8f2f4a88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4064
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #1: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781
stack backtrace:
CPU: 0 UID: 0 PID: 8789 Comm: syz.4.993 Tainted: G        W           6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4831 [inline]
 check_wait_context kernel/locking/lockdep.c:4903 [inline]
 __lock_acquire+0xbcf/0xd20 kernel/locking/lockdep.c:5185
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
 __mutex_lock_common kernel/locking/mutex.c:601 [inline]
 __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746
 netdev_lock include/linux/netdevice.h:2751 [inline]
 netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 dev_set_allmulti+0x10e/0x260 net/core/dev_api.c:311
 team_change_rx_flags+0x20f/0x330 drivers/net/team/team_core.c:1789
 dev_change_rx_flags net/core/dev.c:9145 [inline]
 netif_set_allmulti+0x20f/0x380 net/core/dev.c:9235
 __dev_change_flags+0x52e/0x6d0 net/core/dev.c:9376
 netif_change_flags+0x88/0x1a0 net/core/dev.c:9417
 do_setlink+0xcb9/0x40d0 net/core/rtnetlink.c:3152
 rtnl_group_changelink net/core/rtnetlink.c:3783 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3937 [inline]
 rtnl_newlink+0x149f/0x1c70 net/core/rtnetlink.c:4065
 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6955
 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x219/0x270 net/socket.c:727
 ____sys_sendmsg+0x505/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c24d8e969
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:00007f7c25b69038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c24fb6160 RCX: 00007f7c24d8e969
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000007
RBP: 00007f7c24e10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7c24fb6160 R15: 00007f7c250dfa28
 </TASK>
dummy0: entered allmulticast mode
nlmon0: entered allmulticast mode
caif0: entered allmulticast mode
batadv0: entered allmulticast mode
vxcan0: entered allmulticast mode
vxcan1: entered allmulticast mode
veth0: entered allmulticast mode
veth1: entered allmulticast mode
wg0: entered allmulticast mode
wg1: entered allmulticast mode
wg2: entered allmulticast mode
veth0_to_bridge: entered allmulticast mode
veth1_to_bridge: entered allmulticast mode
veth0_to_bond: entered allmulticast mode
veth1_to_bond: entered allmulticast mode
veth0_to_team: entered allmulticast mode
veth1_to_team: entered allmulticast mode
veth0_to_batadv: entered allmulticast mode
batman_adv: batadv0: Interface deactivated: batadv_slave_0
batadv_slave_0: entered allmulticast mode
veth1_to_batadv: entered allmulticast mode
batman_adv: batadv0: Interface deactivated: batadv_slave_1
batadv_slave_1: entered allmulticast mode
xfrm0: entered allmulticast mode
veth0_to_hsr: entered allmulticast mode
hsr_slave_0: entered allmulticast mode
veth1_to_hsr: entered allmulticast mode
hsr_slave_1: entered allmulticast mode
hsr0: entered allmulticast mode
veth1_virt_wifi: entered allmulticast mode
veth0_virt_wifi: entered allmulticast mode
net veth1_virt_wifi virt_wifi0: entered allmulticast mode
veth1_vlan: entered allmulticast mode
veth0_vlan: entered allmulticast mode
vlan0: entered allmulticast mode
vlan1: entered allmulticast mode
macvlan0: entered allmulticast mode
macvlan1: entered allmulticast mode
ipvlan0: entered allmulticast mode
ipvlan1: entered allmulticast mode
veth1_macvtap: entered allmulticast mode
veth0_macvtap: entered allmulticast mode
macvtap0: entered allmulticast mode
macsec0: entered allmulticast mode
geneve0: entered allmulticast mode
netdevsim netdevsim4 netdevsim0: unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim4 netdevsim1: unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim4 netdevsim2: unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim4 netdevsim3: unset [1, 0] type 2 family 0 port 6081 - 0
geneve1: entered allmulticast mode
netdevsim netdevsim4 netdevsim0: left promiscuous mode
netdevsim netdevsim4 netdevsim0: entered allmulticast mode
netdevsim netdevsim4 netdevsim1: entered allmulticast mode
netdevsim netdevsim4 netdevsim2: entered allmulticast mode
netdevsim netdevsim4 netdevsim3: entered allmulticast mode
mac80211_hwsim hwsim2 wlan0: entered allmulticast mode
sit1: entered allmulticast mode
bridge1: entered allmulticast mode
bond1: entered allmulticast mode
gretap1: entered allmulticast mode