rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P3583/1:b..l
	(detected by 1, t=10502 jiffies, g=4869, q=95)
task:syz.1.2         state:R  running task     stack:23992 pid: 3583 ppid:  3508 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_is_held_type+0x137/0x180
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900031875f8 EFLAGS: 00000206
RAX: 85baf29cb5da4000 RBX: 0000000000000002 RCX: 0000000080000000
RDX: ffffc900035db000 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f740
RBP: 0000000000000000 R08: ffffffff81b91200 R09: fffffbfff1f7f219
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: ffff888013780000 R14: 00000000ffffffff R15: ffffffff8c91fa60
 lock_is_held include/linux/lockdep.h:287 [inline]
 rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
 task_css include/linux/cgroup.h:496 [inline]
 mem_cgroup_from_task+0x49/0x110 mm/memcontrol.c:935
 count_memcg_event_mm+0x16c/0x3e0 include/linux/memcontrol.h:1079
 handle_mm_fault+0x161/0x5950 mm/memory.c:4834
 faultin_page mm/gup.c:976 [inline]
 __get_user_pages+0x4ed/0x11d0 mm/gup.c:1197
 populate_vma_page_range+0x215/0x2a0 mm/gup.c:1529
 __mm_populate+0x2a5/0x4a0 mm/gup.c:1638
 mm_populate include/linux/mm.h:2632 [inline]
 vm_mmap_pgoff+0x22b/0x2d0 mm/util.c:556
 ksys_mmap_pgoff+0x13e/0x780 mm/mmap.c:1624
 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: 0033:0x7f56ed73fbd9
RSP: 002b:00007f56ec1c0048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f56ed8cdf60 RCX: 00007f56ed73fbd9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f56ed7aea98 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f56ed8cdf60 R15: 00007ffef2ce01d8
 </TASK>
rcu: rcu_preempt kthread starved for 10543 jiffies! g4869 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:27064 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 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:300
 </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: 3591 Comm: syz.2.3 Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_xstate_in_sigframe arch/x86/kernel/fpu/signal.c:38 [inline]
RIP: 0010:__fpu_restore_sig arch/x86/kernel/fpu/signal.c:317 [inline]
RIP: 0010:fpu__restore_sig+0x2d7/0x1100 arch/x86/kernel/fpu/signal.c:466
Code: 24 28 42 0f b6 04 38 84 c0 0f 85 b4 09 00 00 8b 9c 24 10 01 00 00 bf 53 58 50 46 89 de e8 f1 24 51 00 81 fb 53 58 50 46 75 3f <49> 8d 7e 10 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 f5 09
RSP: 0018:ffffc90003e17aa0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000046505853 RCX: 0000000000000000
RDX: ffff888018ad1dc0 RSI: 0000000046505853 RDI: 0000000046505853
RBP: ffffc90003e17c50 R08: ffffffff812f393f R09: fffff520007c2f7c
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 00007eff8d173c80 R14: ffffc90003e17bb0 R15: dffffc0000000000
FS:  00007eff8d1746c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb1bff8 CR3: 000000006362b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 restore_sigcontext+0x638/0x710 arch/x86/kernel/signal.c:139
 __do_sys_rt_sigreturn+0x190/0x250 arch/x86/kernel/signal.c:674
 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: 0033:0x7eff8e6f3bd7
Code: ff ff 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
RSP: 002b:00007eff8d174048 EFLAGS: 00000246
RAX: 0000000000000049 RBX: 00007eff8e881f60 RCX: 00007eff8e6f3bd9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000004
RBP: 00007eff8e762a98 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007eff8e881f60 R15: 00007ffca4f10f08
 </TASK>
sched: RT throttling activated