rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15276/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=57853, q=659 ncpus=2)
task:rm              state:R  running task     stack:25808 pid:15276 tgid:15276 ppid:15207  task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6855
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7182
 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 c4 f4 d7 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90004dcec58 EFLAGS: 00000206
RAX: 368457e878767f00 RBX: 0000000000000000 RCX: 368457e878767f00
RDX: 000000004c1bd004 RSI: ffffffff8d94db09 RDI: ffffffff8bbfc000
RBP: ffffffff8173ef25 R08: ffffffff8173ef25 R09: ffffffff8df42000
R10: dffffc0000000000 R11: ffffffff81ad12f0 R12: 0000000000000002
R13: ffffffff8df42000 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:867 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:332
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1845
 prep_new_page mm/page_alloc.c:1853 [inline]
 get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3879
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5178
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507
 pagetable_alloc_noprof include/linux/mm.h:2962 [inline]
 pmd_alloc_one_noprof include/asm-generic/pgalloc.h:142 [inline]
 __pmd_alloc+0x3a/0x540 mm/memory.c:6621
 pmd_alloc include/linux/mm.h:2919 [inline]
 __handle_mm_fault+0x9ad/0x5420 mm/memory.c:6324
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6535
 do_user_addr_fault+0x764/0x1380 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0010:__clear_user arch/x86/include/asm/uaccess_64.h:188 [inline]
RIP: 0010:clear_user arch/x86/include/asm/uaccess_64.h:205 [inline]
RIP: 0010:padzero fs/binfmt_elf.c:133 [inline]
RIP: 0010:elf_load+0x4cd/0x6c0 fs/binfmt_elf.c:435
Code: 6c 24 10 eb 7b 41 be 00 10 00 00 4d 29 ee 48 c7 c7 53 02 79 8d be b5 00 00 00 e8 ce 4e b8 ff 0f 01 cb 31 c0 4c 89 e7 4c 89 f1 <f3> aa 0f 1f 00 49 89 ce 0f 01 ca 31 ff 48 89 ce e8 ae 05 6b ff 8b
RSP: 0018:ffffc90004dcf9a0 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 00007f254fdaf310 RCX: 00000000000004b4
RDX: 0000000000000000 RSI: ffffffff8d94db09 RDI: 00007f254fdaeb4c
RBP: dffffc0000000000 R08: ffffffff820e5c00 R09: ffff88807be66540
R10: dffffc0000000000 R11: ffffed1005a177a1 R12: 00007f254fdaeb4c
R13: 0000000000000b4c R14: 00000000000004b4 R15: ffff8880644f08a8
 load_elf_interp+0x4ce/0xb60 fs/binfmt_elf.c:689
 load_elf_binary+0x1a01/0x2740 fs/binfmt_elf.c:1254
 search_binary_handler fs/exec.c:1669 [inline]
 exec_binprm fs/exec.c:1701 [inline]
 bprm_execve+0x92e/0x1400 fs/exec.c:1753
 do_execveat_common+0x510/0x6a0 fs/exec.c:1859
 do_execve fs/exec.c:1933 [inline]
 __do_sys_execve fs/exec.c:2009 [inline]
 __se_sys_execve fs/exec.c:2004 [inline]
 __x64_sys_execve+0x94/0xb0 fs/exec.c:2004
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8184198107
RSP: 002b:00007ffe677415d8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000559bd2b9afe0 RCX: 00007f8184198107
RDX: 0000559bd2b9b000 RSI: 0000559bd2b9afe0 RDI: 0000559bd2b9b088
RBP: 0000559bd2b9b088 R08: 00007ffe67743e67 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000559bd2b9b000
R13: 00007f818435de8b R14: 0000559bd2b9b000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10463 jiffies! g57853 f0x0 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:27376 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6855
 __schedule_loop kernel/sched/core.c:6937 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6952
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </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 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: be c3 c9 f5 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 53 cd 21 00 f3 0f 1e fa fb f4 <e9> 93 c3 c9 f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 405c97efa51b9100 RBX: ffffffff8197247a RCX: 405c97efa51b9100
RDX: 0000000000000001 RSI: ffffffff8d768032 RDI: ffffffff8bbfc000
RBP: ffffc90000197f10 R08: ffff8880b893361b R09: 1ffff110171266c3
R10: dffffc0000000000 R11: ffffed10171266c4 R12: ffffffff8f802670
R13: 1ffff110038d9b70 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881261c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31619ff8 CR3: 0000000085360000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1ea/0x520 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>