rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=01c4/1/0x4000000000000000 softirq=14054/14055 fqs=1
rcu: (detected by 0, t=10506 jiffies, g=16941, q=315 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6816 Comm: cmp Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:mark_lock+0x3/0x350 kernel/locking/lockdep.c:4638
Code: 04 ff ff ff e8 8e 4b 3d 0a 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 10 49 89 f7 48 89 3c 24 49 bd 00 00
RSP: 0018:ffffc90000a18938 EFLAGS: 00000006
RAX: 00000000000c4001 RBX: 1ffff110041118ea RCX: ffffffff81702e6a
RDX: 0000000000000008 RSI: ffff88802088c730 RDI: ffff88802088bc00
RBP: ffff88802088c730 R08: ffffffff934f1847 R09: 1ffffffff269e308
R10: dffffc0000000000 R11: fffffbfff269e309 R12: ffff88802088bc00
R13: ffff88802088c6d8 R14: 0000000000000000 R15: ffff88802088c750
FS: 00007f5f2b4ea380(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ecc6b7aaf8 CR3: 000000005c3ec000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
mark_usage kernel/locking/lockdep.c:4598 [inline]
__lock_acquire+0xc35/0x2040 kernel/locking/lockdep.c:5096
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:764
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1657 [inline]
__hrtimer_run_queues+0x305/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5763
Code: 2b 00 74 08 4c 89 f7 e8 7a da 87 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000e607980 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001cc0f3c RCX: aaf2f50c2f94d000
RDX: dffffc0000000000 RSI: ffffffff8beae6c0 RDI: ffffffff8c3f9000
RBP: ffffc9000e607ae0 R08: ffffffff934f18ef R09: 1ffffffff269e31d
R10: dffffc0000000000 R11: fffffbfff269e31e R12: 1ffff92001cc0f38
R13: dffffc0000000000 R14: ffffc9000e6079e0 R15: 0000000000000246
percpu_down_read_trylock include/linux/percpu-rwsem.h:92 [inline]
__sb_start_write_trylock include/linux/fs.h:1680 [inline]
sb_start_write_trylock include/linux/fs.h:1816 [inline]
touch_atime+0x1c1/0x690 fs/inode.c:2040
file_accessed include/linux/fs.h:2480 [inline]
shmem_file_read_iter+0x8af/0xa50 mm/shmem.c:3054
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9bd/0xbc0 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7f5f2b63eb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc5afb4218 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055ecc6b792a0 RCX: 00007f5f2b63eb6a
RDX: 0000000000001000 RSI: 000055ecc6b79af0 RDI: 0000000000000003
RBP: 000055ecc6b792a0 R08: 0000000000000003 R09: 0000000000000001
R10: 000000000000010f R11: 0000000000000246 R12: 000055ecc6b79910
R13: 0000000000000000 R14: 00007ffc5afb4e73 R15: 00007ffc5afb4e62
</TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g16941 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:24176 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline]
RIP: 0010:smp_call_function_many_cond+0x1860/0x29d0 kernel/smp.c:856
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 79 14 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 24 10 0c 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 08 10
RSP: 0000:ffffc900015e7700 EFLAGS: 00000293
RAX: ffffffff818766e8 RBX: 1ffff110172688f1 RCX: ffff888017793c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900015e78e0 R08: ffffffff818766b7 R09: 1ffffffff269e308
R10: dffffc0000000000 R11: fffffbfff269e309 R12: dffffc0000000000
R13: ffff8880b9344788 R14: ffff8880b923fb40 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 000000000e534000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2085 [inline]
text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2295
text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:833
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>