rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=10913, q=267 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294957078-4294946575), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g10913 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:28840 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0x7e0 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:100
Code: 40 df b2 8b 4c 89 74 24 70 48 c7 c6 70 ed f4 81 48 01 c3 e8 9b 64 66 f6 4c 89 e7 48 89 5c 24 30 e8 ce 7f 66 f6 e8 39 65 fe ff <4c> 89 e7 e8 11 31 66 f6 4c 89 e7 e8 99 20 66 f6 48 b8 00 00 00 00
RSP: 0018:ffffc90000157bb0 EFLAGS: 00010246
RAX: 0000000000208040 RBX: 00000000ffffaf10 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c1c3980 RDI: 0000000000000001
RBP: 1ffff9200002af76 R08: 0000000000000000 R09: fffffbfff21af9ca
R10: ffffffff90d7ce57 R11: 0000000000000000 R12: ffffc90000157bd0
R13: 1ffffffff1c81e50 R14: ffff88801e2b0000 R15: dffffc0000000000
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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: 1 UID: 0 PID: 5631 Comm: syz-executor184 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 56 61 5c 00 48 89 df 5b e9 1d ec 61 00 be 03 00 00 00 5b e9 72 e0 f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 8b 05 25 81 02 12 48 8b 34 24 65 48 8b 15 01 81 02
RSP: 0018:ffffc9000207f988 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f27d6e5cb28 RCX: ffffffff81fadf1e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888079bd4a00
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000207fb90 R15: 0000000000000000
FS:  00007f27d6d846c0(0000) GS:ffff88812446d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffccf0fee80 CR3: 0000000070d82000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 get_futex_key+0x1ec/0x1510 kernel/futex/core.c:581
 futex_wait_setup+0x83/0x510 kernel/futex/waitwake.c:618
 __futex_wait+0x19f/0x300 kernel/futex/waitwake.c:686
 futex_wait+0xe6/0x370 kernel/futex/waitwake.c:719
 do_futex+0x1ef/0x350 kernel/futex/syscalls.c:130
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex kernel/futex/syscalls.c:188 [inline]
 __x64_sys_futex+0x34f/0x4d0 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27d6dad4d9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f27d6d84138 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f27d6e5cb28 RCX: 00007f27d6dad4d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f27d6e5cb28
RBP: 00007f27d6e5cb20 R08: 00007f27d6d84cdc R09: 00007f27d6d84cdc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27d6e5cb2c
R13: 0000000000000000 R14: 00007ffccf0ff9a0 R15: 00007ffccf0ffa88
 </TASK>