rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7085/1:b..l
(detected by 0, t=10503 jiffies, g=26021, q=78)
task:syz-executor state:R running task stack:20608 pid: 7085 ppid: 7078 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6549
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6574
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
vprintk_emit+0x146/0x150 kernel/printk/printk.c:2275
_printk+0xd1/0x120 kernel/printk/printk.c:2299
batadv_check_known_mac_addr+0x28a/0x3d0 net/batman-adv/hard-interface.c:522
batadv_hard_if_event+0x300/0x17a0 net/batman-adv/hard-interface.c:986
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers net/core/dev.c:2044 [inline]
dev_set_mac_address+0x325/0x470 net/core/dev.c:9074
dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:9088
do_setlink+0x7f0/0x3d80 net/core/rtnetlink.c:2702
__rtnl_newlink net/core/rtnetlink.c:3418 [inline]
rtnl_newlink+0x17d6/0x2070 net/core/rtnetlink.c:3540
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5618
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2503
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1920
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
__sys_sendto+0x564/0x720 net/socket.c:2058
__do_sys_sendto net/socket.c:2070 [inline]
__se_sys_sendto net/socket.c:2066 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2066
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f04a1900d8c
RSP: 002b:00007fff5ffaa0f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f04a25e6620 RCX: 00007f04a1900d8c
RDX: 000000000000002c RSI: 00007f04a25e6670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff5ffaa144 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f04a25e6670 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10478 jiffies! g26021 f0x0 RCU_GP_DOING_FQS(6) ->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:27064 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0010:rcu_gp_fqs_loop+0xde8/0x1080 kernel/rcu/tree.c:1994
Code: ff f6 44 24 14 01 74 1a 45 31 ff 80 3d 14 09 26 0b 00 41 0f 95 c7 41 c1 e7 02 c7 44 24 14 00 00 00 00 65 4c 8b 35 f8 35 96 7e <4d> 8d a6 68 04 00 00 4c 89 e3 48 c1 eb 03 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90000d47ca0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000400 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8a8b2a20 RDI: 0000000000000001
RBP: ffffc90000d47df0 R08: ffffffff8186dac0 R09: fffffbfff1924771
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000d47d60 R14: ffff888017e4bb80 R15: 0000000000000000
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 7361 Comm: syz.0.857 Not tainted 5.15.166-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: a1 68 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3e 1e 25 f7 48 89 df e8 16 72 26 f7 e8 b1 25 49 f7 fb bf 01 00 00 00 f6 b7 19 f7 65 8b 05 d7 ba c4 75 85 c0 74 02 5b c3 e8 a4 d7 c2
RSP: 0018:ffffc90002e37d70 EFLAGS: 00000282
RAX: 85f42bb1f49eb200 RBX: ffff88807eb0d340 RCX: ffffffff96867f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a20 RDI: 0000000000000001
RBP: ffffc90002e37e50 R08: ffffffff8186dac0 R09: ffffed100fd61a69
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110043bb896
R13: ffff888021ddbb80 R14: 0000000000000000 R15: 1ffff110043bb895
spin_unlock_irq include/linux/spinlock.h:413 [inline]
__set_current_blocked+0x2a5/0x2f0 kernel/signal.c:3085
__do_sys_rt_sigreturn+0x181/0x250 arch/x86/kernel/signal.c:672
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4a96ff9859
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffce1cdae40 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f4a972172a0 RCX: 00007f4a96ff9859
RDX: 00007ffce1cdae40 RSI: 00007ffce1cdaf70 RDI: 0000000000000021
RBP: 00007f4a97217214 R08: 00007f4a97216f80 R09: 00007ffce1cdb847
R10: 0000000000000008 R11: 0000000000000206 R12: 0000000000000003
R13: 00007f4a97217208 R14: 0000000000000003 R15: 00000000000009a2