rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7372/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=18613, q=612 ncpus=2)
task:syz-executor    state:R  running task     stack:27032 pid:7372  tgid:7372  ppid:5807   task_flags:0x400040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x1553/0x5240 kernel/sched/core.c:6911
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7238
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 e5 aa 82 09 f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 51 08 ae 10 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 3e 29 cd
RSP: 0018:ffffc9000413f0d8 EFLAGS: 00000286
RAX: a22e5d3bc2891400 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 000000002157760f RSI: ffffffff8d7bd735 RDI: ffffffff8ba66b00
RBP: 0000000000000000 R08: ffffffff8b25481c R09: ffffffff8ddcb980
R10: dffffc0000000000 R11: fffffbfff1ed47b7 R12: 0000000000000002
R13: ffffffff8ddcb980 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 __rt_spin_trylock kernel/locking/spinlock_rt.c:110 [inline]
 rt_spin_trylock+0x128/0x2b0 kernel/locking/spinlock_rt.c:118
 consume_stock mm/memcontrol.c:1849 [inline]
 try_charge_memcg+0x26a/0x1630 mm/memcontrol.c:2371
 obj_cgroup_charge_pages+0x1e/0xa0 mm/memcontrol.c:2857
 obj_cgroup_charge_account+0x421/0x780 mm/memcontrol.c:3160
 __memcg_slab_post_alloc_hook+0x5c6/0xa20 mm/memcontrol.c:3249
 memcg_slab_post_alloc_hook mm/slub.c:2457 [inline]
 slab_post_alloc_hook mm/slub.c:4549 [inline]
 slab_alloc_node mm/slub.c:4866 [inline]
 kmem_cache_alloc_lru_noprof+0x3f6/0x680 mm/slub.c:4885
 proc_alloc_inode+0x2a/0xc0 fs/proc/inode.c:57
 alloc_inode+0x6a/0x1b0 fs/inode.c:347
 new_inode+0x22/0x170 fs/inode.c:1185
 proc_pid_make_inode+0x21/0x130 fs/proc/base.c:1953
 proc_pid_make_base_inode fs/proc/base.c:2004 [inline]
 proc_pid_instantiate+0x53/0x2b0 fs/proc/base.c:3489
 proc_pid_lookup+0x2fa/0x420 fs/proc/base.c:3532
 proc_root_lookup+0x20/0x50 fs/proc/root.c:405
 __lookup_slow+0x2d2/0x440 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 walk_component fs/namei.c:2279 [inline]
 link_path_walk+0x1273/0x18d0 fs/namei.c:2644
 path_openat+0x2d5/0x38a0 fs/namei.c:4826
 do_file_open+0x23e/0x4a0 fs/namei.c:4859
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b2db4cfce
RSP: 002b:00007fff7e0d6448 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055558fab7500 RCX: 00007f4b2db4cfce
RDX: 0000000000080001 RSI: 00007f4b2dc23c2e RDI: ffffffffffffff9c
RBP: 00007f4b2dc23c2e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007fff7e0d6520 R14: 000000000004b38d R15: 00007fff7e0d6a90
 </TASK>
rcu: rcu_preempt kthread starved for 9971 jiffies! g18613 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:26920 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x1553/0x5240 kernel/sched/core.c:6911
 __schedule_loop kernel/sched/core.c:6993 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7008
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 5e 5d 02 e9 13 c4 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d f3 8c 26 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8da07dc0 EFLAGS: 00000242
RAX: 0000000000e051b3 RBX: ffffffff81996dba RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d56122d RDI: ffffffff8ba66b00
RBP: ffffffff8da07eb0 R08: ffff8880b8833f1b R09: 1ffff110171067e3
R10: dffffc0000000000 R11: ffffed10171067e4 R12: ffffffff8f6a3db0
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1b605d8
FS:  0000000000000000(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2588f7930b CR3: 0000000028742000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:766 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1ba/0x5d0 kernel/sched/idle.c:341
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:439
 rest_init+0x2de/0x300 init/main.c:760
 start_kernel+0x385/0x3d0 init/main.c:1210
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x147
 </TASK>