rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4268/1:b..l
	(detected by 1, t=10503 jiffies, g=8985, q=615 ncpus=2)
task:syz-executor358 state:R  running task     stack:21456 pid:4268  ppid:4263   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6730
 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:6754
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 vprintk_emit+0x5c9/0x680 kernel/printk/printk.c:2304
 _printk+0xcc/0x110 kernel/printk/printk.c:2328
 batadv_check_known_mac_addr+0x29b/0x3e0 net/batman-adv/hard-interface.c:525
 batadv_hard_if_event+0x491/0x1550 net/batman-adv/hard-interface.c:992
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
 call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
 call_netdevice_notifiers net/core/dev.c:2053 [inline]
 dev_set_mac_address+0x2c4/0x3d0 net/core/dev.c:8886
 dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:8900
 do_setlink+0x816/0x3c40 net/core/rtnetlink.c:2788
 __rtnl_newlink net/core/rtnetlink.c:3608 [inline]
 rtnl_newlink+0x17d6/0x1ff0 net/core/rtnetlink.c:3655
 rtnetlink_rcv_msg+0x79b/0xed0 net/core/rtnetlink.c:6153
 netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2493
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x74c/0x8c0 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x89e/0xbc0 net/netlink/af_netlink.c:1859
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x44f/0x5c0 net/socket.c:2153
 __do_sys_sendto net/socket.c:2165 [inline]
 __se_sys_sendto net/socket.c:2161 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2161
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa37723d81c
RSP: 002b:00007fffabd1caf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fa3772c7420 RCX: 00007fa37723d81c
RDX: 000000000000002c RSI: 00007fa3772c7470 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffabd1cb44 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fa3772c7470 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10553 jiffies! g8985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27200 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4322 Comm: syz-executor358 Not tainted 6.1.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__rcu_read_unlock+0x51/0xd0 kernel/rcu/tree_plugin.h:425
Code: ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 <75> 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41
RSP: 0018:ffffc90003fd7ea8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802a48bfbc RCX: ffff88802a48bb80
RDX: 0000000000000000 RSI: ffffffff8abf1240 RDI: ffff88802a48bb80
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffffbfff2117049
R10: fffffbfff2117049 R11: 1ffffffff2117048 R12: 1ffff110054917f7
R13: dffffc0000000000 R14: ffff88802a48bfc0 R15: dffffc0000000000
FS:  00005555698fd3c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 0000000028bff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 __task_pid_nr_ns+0x377/0x460 kernel/pid.c:501
 task_tgid_vnr include/linux/sched.h:1628 [inline]
 __ia32_sys_getpid+0x19/0x20 kernel/sys.c:953
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa37723a227
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d 52 32 09 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 23 cd fd ff 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007fffabd1cac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007fffabd1cc30 RCX: 00007fa37723a227
RDX: 00007fffabd1cb00 RSI: 00007fffabd1cc30 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007fa3772921fa R09: 00007fa3772921fa
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fa377292469
R13: 0000000000000001 R14: 00007fffabd1d0e0 R15: 0000000000000000
 </TASK>
sched: RT throttling activated
hrtimer: interrupt took 961183754 ns