rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=12889, q=249)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294958808-4294948306), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g12889 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28032 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5155 Comm: syz-executor.1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:rcu_is_watching+0x6a/0xa0 kernel/rcu/tree.c:1125
Code: 48 c7 c3 08 b3 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 2b 8b 03 65 ff 0d f5 bf 9e 7e 74 08 24 01 5b 41 5e <41> 5f c3 e8 b6 ca 9c ff eb f1 48 c7 c7 e0 12 12 8c 48 89 de e8 9d
RSP: 0018:ffffc90000dd0e30 EFLAGS: 00000002
RAX: 000000000000a501 RBX: ffff88802b945940 RCX: 38863914c0689700
RDX: 0000000000010000 RSI: ffffffff8a59a4a0 RDI: ffffffff8a59a460
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: 0000000000000000
R13: ffff88802b945940 R14: 0000000000000001 R15: dffffc0000000000
FS:  00007fcbfceba6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcbfceb9d80 CR3: 000000001e476000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 __lock_task_sighand+0x3a/0x290 kernel/signal.c:1387
 lock_task_sighand include/linux/sched/signal.h:710 [inline]
 do_send_sig_info kernel/signal.c:1293 [inline]
 group_send_sig_info+0x1ac/0x220 kernel/signal.c:1442
 do_bpf_send_signal+0x7b/0x150 kernel/trace/bpf_trace.c:779
 irq_work_single kernel/irq_work.c:155 [inline]
 irq_work_run_list+0x1bb/0x330 kernel/irq_work.c:177
 irq_work_run+0x63/0xe0 kernel/irq_work.c:186
 __sysvec_irq_work+0x98/0x240 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x98/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:mem_cgroup_handle_over_high+0x1/0x280 mm/memcontrol.c:2514
Code: 00 00 48 c7 c2 60 d5 15 8a e8 0b e4 dd 07 e8 46 b9 a3 ff 5b 41 5c 41 5d 41 5e 41 5f e9 38 a0 00 00 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00
RSP: 0018:ffffc90002067ec0 EFLAGS: 00000246
RAX: 38863914c0689700 RBX: ffffc90002067f58 RCX: 1ffff9200040cfb0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002067f48 R08: dffffc0000000000 R09: ffffed1004db0b91
R10: ffffed1004db0b91 R11: 1ffff11004db0b90 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88802b945940 R15: ffff88802b945940
 tracehook_notify_resume include/linux/tracehook.h:198 [inline]
 exit_to_user_mode_loop+0xcc/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcbfdb60670
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a 9b 04 00 e8 25 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007fcbfceb9bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fcbfdc67f88 RCX: 00007fcbfdb38ee9
RDX: 00007fcbfceb9bc0 RSI: 00007fcbfceb9cf0 RDI: 0000000000000021
RBP: 00007fcbfdc67f80 R08: 00007fcbfceba6c0 R09: 00007fcbfceba6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcbfdc67f8c
R13: 000000000000000b R14: 00007ffe3d7a94b0 R15: 00007ffe3d7a9598
 </TASK>