rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=ea1c/1/0x4000000000000000 softirq=46568/46577 fqs=0
	(t=10500 jiffies g=70301 q=225092 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g70301 f0x2 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:27024 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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: 12889 Comm: syz.0.3028 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:206
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 af 9c 01 03 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90000007e38 EFLAGS: 00000046
RAX: 0000000000009fdf RBX: 0000000000009fdf RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000009fdf RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff8e1fdeef R09: 1ffffffff1c3fbdd
R10: dffffc0000000000 R11: fffffbfff1c3fbde R12: dffffc0000000000
R13: 0000000010000508 R14: ffffffff8c651b40 R15: dffffc0000000000
FS:  00007f364e6ea6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3bfec0 CR3: 000000002ffee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:394 [inline]
 lapic_next_event+0x5b/0x70 arch/x86/kernel/apic/apic.c:478
 clockevents_program_event+0x1bc/0x310 kernel/time/clockevents.c:334
 hrtimer_interrupt+0x59d/0x9c0 kernel/time/hrtimer.c:1886
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__setup_rt_frame arch/x86/kernel/signal.c:490 [inline]
RIP: 0010:setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
RIP: 0010:handle_signal arch/x86/kernel/signal.c:828 [inline]
RIP: 0010:arch_do_signal_or_restart+0xdb9/0x1350 arch/x86/kernel/signal.c:873
Code: ff df 48 8b 8c 24 b0 00 00 00 80 3c 01 00 4c 8b 7c 24 18 74 08 4c 89 ff e8 54 56 a6 00 49 8b 07 49 89 86 30 01 00 00 0f 01 ca <f6> 84 24 48 01 00 00 04 49 bc 00 00 00 00 00 fc ff df 74 25 49 8d
RSP: 0018:ffffc900044a7ca0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000894fac RCX: 1ffff11005564894
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffc900044a7fd8
RBP: ffffc900044a7ec0 R08: 0000000000000000 R09: 1ffff92000894f71
R10: dffffc0000000000 R11: fffff52000894f72 R12: ffff88802ab25428
R13: ffffc900044a7ff8 R14: 00007f364e6e9a78 R15: ffff88802ab244a0
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f364d79c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f364e6ea028 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f364da16090 RCX: 00007f364d79c819
RDX: 0000200000000040 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00007f364d832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f364da16128 R14: 00007f364da16090 R15: 00007ffd75a84c88
 </TASK>
CPU: 1 PID: 12878 Comm: syz.5.3024 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0xc/0xa0 kernel/rcu/tree.c:721
Code: 40 b3 8c 4c 89 f6 e8 83 9e cc 02 e9 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 53 65 ff 05 6c ff 95 7e <e8> df 69 c1 08 89 c3 83 f8 08 73 60 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90003c27878 EFLAGS: 00000283
RAX: 0000000000000001 RBX: ffff88802e81d000 RCX: 0000000000000000
RDX: 0000000000000050 RSI: 0000000000000000 RDI: ffff88802e81d050
RBP: 0000000000000dc0 R08: ffff88823b400000 R09: ffff88802e81d000
R10: 000000000fa6d797 R11: fffffbfff1c3fbde R12: ffff888140009140
R13: 0000000000000050 R14: ffff888140009140 R15: ffff88802e81d000
FS:  00007f5dda2896c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005f522000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_kmem_cache_alloc include/trace/events/kmem.h:12 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3376 [inline]
 kmem_cache_alloc+0x151/0x2f0 mm/slub.c:3383
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 lsm_file_alloc security/security.c:576 [inline]
 security_file_alloc+0x30/0x110 security/security.c:1544
 __alloc_file+0xc2/0x230 fs/file_table.c:143
 alloc_empty_file+0x90/0x180 fs/file_table.c:187
 path_openat+0x10f/0x2ee0 fs/namei.c:3777
 do_filp_open+0x1f1/0x430 fs/namei.c:3818
 do_sys_openat2+0x150/0x4b0 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5dd939c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5dda289028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5dd9615fa0 RCX: 00007f5dd939c819
RDX: 0000000000101240 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f5dd9432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000010a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5dd9616038 R14: 00007f5dd9615fa0 R15: 00007ffd81102a38
 </TASK>