rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P18811/1:b..l P21018/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=238417, q=193 ncpus=2)
task:syz-executor state:R running task stack:23824 pid:21018 tgid:21018 ppid:21017 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6708
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1191 [inline]
copy_pmd_range mm/memory.c:1252 [inline]
copy_pud_range mm/memory.c:1289 [inline]
copy_p4d_range mm/memory.c:1313 [inline]
copy_page_range+0x1c95/0x57d0 mm/memory.c:1411
dup_mmap kernel/fork.c:749 [inline]
dup_mm kernel/fork.c:1672 [inline]
copy_mm kernel/fork.c:1721 [inline]
copy_process+0x8117/0x8de0 kernel/fork.c:2374
kernel_clone+0xfd/0x980 kernel/fork.c:2781
__do_sys_clone+0xba/0x100 kernel/fork.c:2924
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68e5d6db93
RSP: 002b:00007fff9eb83558 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f68e5d6db93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055558bfc37d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000215dd7 R14: 0000000000215ce7 R15: 00007fff9eb836e0
task:kworker/u8:14 state:R running task stack:24008 pid:18811 tgid:18811 ppid:2 flags:0x00004000
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6708
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
__text_poke+0x618/0xca0 arch/x86/kernel/alternative.c:1960
text_poke_bp_batch+0x3e0/0x760 arch/x86/kernel/alternative.c:2317
text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2483 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2493
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:900
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate mm/kfence/core.c:833 [inline]
toggle_allocation_gate+0xf8/0x250 mm/kfence/core.c:825
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10498 jiffies! g238417 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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 21611 Comm: syz.4.3251 Not tainted 6.10.0-syzkaller-12888-g5437f30d3458 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:match_held_lock+0x5f/0xc0 kernel/locking/lockdep.c:5206
Code: 28 5c 8f 48 2d e0 8a 62 94 48 c1 f8 03 48 0f af c2 0f b7 53 20 5b 81 e2 ff 1f 00 00 48 39 d0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 01 00 00 00 5b c3 cc cc cc cc 31 f6 e8 3f fe ff ff 48 85 c0 75
RSP: 0018:ffffc90000007d30 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802a3c46e0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff88802f02a300 RDI: ffff88802a3c46e0
RBP: ffff88802f02a300 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802a3c3c00
R13: ffff88802a3c46e0 R14: 00000000ffffffff R15: 0000000000000000
FS: 00007f7fafe016c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e1f3ff8 CR3: 000000005be24000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5500 [inline]
lock_is_held_type+0xb0/0x150 kernel/locking/lockdep.c:5831
lock_is_held include/linux/lockdep.h:249 [inline]
advance_sched+0x790/0xc60 net/sched/sch_taprio.c:927
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5062
Code: a9 0a 00 00 44 8b 0d 57 d8 b7 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 a9 ce 36 00 fb 65 48 8b 1d 80 cf a8 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000366f4c8 EFLAGS: 00000206
RAX: 0000000000009e6f RBX: ffff88802a3c3c00 RCX: 1ffffffff2024dd9
RDX: 0000000000000000 RSI: ffffffff8b4cc500 RDI: ffffffff8bb08f40
RBP: ffffc9000366f510 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9012b31f R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88801d319e00 R14: 0000000000000000 R15: 0000000000000000
context_switch kernel/sched/core.c:5191 [inline]
__schedule+0xe3f/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
unix_wait_for_peer+0x247/0x280 net/unix/af_unix.c:1532
unix_dgram_sendmsg+0x182f/0x1a60 net/unix/af_unix.c:2134
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2597
___sys_sendmsg+0x135/0x1e0 net/socket.c:2651
__sys_sendmmsg+0x1a1/0x450 net/socket.c:2737
__do_sys_sendmmsg net/socket.c:2766 [inline]
__se_sys_sendmmsg net/socket.c:2763 [inline]
__x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2763
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7faef77299
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:00007f7fafe01048 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f7faf105f80 RCX: 00007f7faef77299
RDX: 0000000000000651 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f7faefe48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7faf105f80 R15: 00007ffeffad30f8