rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=91bc/1/0x4000000000000000 softirq=71153/71161 fqs=7
rcu: 	(detected by 1, t=10505 jiffies, g=76437, q=820 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15585 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:131 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x9f/0x120 kernel/locking/spinlock.c:194
Code: 47 ea ce f6 f7 c3 00 02 00 00 74 05 e8 fa f9 f2 f6 48 b8 04 00 00 00 00 fc ff df 41 c6 04 07 00 48 c7 44 24 20 00 00 00 00 9c <8f> 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00
RSP: 0018:ffffc90000007cb8 EFLAGS: 00000046
RAX: dffffc0000000004 RBX: 0000000000000802 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b8e2b740
RBP: ffffc90000007d50 R08: ffff8880b8e2b743 R09: 1ffff110171c56e8
R10: dffffc0000000000 R11: ffffed10171c56e9 R12: dffffc0000000000
R13: ffff88802f7b5340 R14: ffff8880b8e2b740 R15: 1ffff92000000f98
FS:  00005555696fa500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbda10e4b40 CR3: 000000005e25b000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x426/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mod_objcg_state+0x5bb/0x8c0 mm/memcontrol.c:3257
Code: 00 00 00 0f 85 6f 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 52 e4 a9 08 41 f7 c6 00 02 00 00 74 a5 fb 4d 85 ff <75> a4 eb aa e8 5c 5a 49 02 85 c0 0f 84 9b fb ff ff 48 c7 c0 30 66
RSP: 0018:ffffc9000bc27ac0 EFLAGS: 00000246
RAX: 5ad2734f7556b600 RBX: 1ffff92001784f64 RCX: 5ad2734f7556b600
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d3ba0
RBP: ffffc9000bc27bc8 R08: ffffffff911eb5af R09: 1ffffffff223d6b5
R10: dffffc0000000000 R11: fffffbfff223d6b6 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000a02 R15: 0000000000000000
 memcg_slab_post_alloc_hook mm/slab.h:544 [inline]
 slab_post_alloc_hook+0x358/0x4d0 mm/slab.h:778
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc_lru+0x175/0x2b0 mm/slub.c:3526
 alloc_inode_sb include/linux/fs.h:2976 [inline]
 shmem_alloc_inode+0x28/0x40 mm/shmem.c:4419
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x63/0x1d0 fs/inode.c:1049
 new_inode+0x22/0x1d0 fs/inode.c:1075
 __shmem_get_inode mm/shmem.c:2467 [inline]
 shmem_get_inode+0x34d/0xcd0 mm/shmem.c:2539
 shmem_symlink+0xa3/0x470 mm/shmem.c:3471
 vfs_symlink+0x138/0x2b0 fs/namei.c:4528
 do_symlinkat+0x1ba/0x400 fs/namei.c:4554
 __do_sys_symlinkat fs/namei.c:4570 [inline]
 __se_sys_symlinkat fs/namei.c:4567 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4567
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f813439d217
Code: 44 00 00 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 8e f5 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0a 01 00 00 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:00007ffc8bda14c8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f813439d217
RDX: 00007f813443603a RSI: 00000000ffffff9c RDI: 00007ffc8bda1560
RBP: 00007ffc8bda150c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000159
R13: 00000000000927c0 R14: 000000000006c279 R15: 00007ffc8bda1560
 </TASK>
rcu: rcu_preempt kthread starved for 10470 jiffies! g76437 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:26504 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 15598 Comm: syz.0.3573 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0xd85/0x1190 kernel/smp.c:855
Code: 45 8b 34 24 44 89 f6 83 e6 01 31 ff e8 34 01 0b 00 41 83 e6 01 49 be 00 00 00 00 00 fc ff df 75 07 e8 6f fd 0a 00 eb 38 f3 90 <42> 0f b6 04 33 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 53 fd
RSP: 0018:ffffc9000bca7660 EFLAGS: 00000246
RAX: ffffffff817c8dfd RBX: 1ffff110171c87a5 RCX: 0000000000080000
RDX: ffffc9000d5ba000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000bca77e0 R08: ffffffff911eb527 R09: 1ffffffff223d6a4
R10: dffffc0000000000 R11: fffffbfff223d6a5 R12: ffff8880b8e43d28
R13: ffff8880b8f3d380 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f13dc3ad6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 00000000269ba000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1022
 bpf_prog_pack_alloc+0x664/0x780 kernel/bpf/core.c:984
 bpf_jit_binary_pack_alloc+0x199/0x410 kernel/bpf/core.c:1164
 bpf_int_jit_compile+0x5f7/0x1240 arch/x86/net/bpf_jit_comp.c:2928
 bpf_prog_select_runtime+0x490/0x7d0 kernel/bpf/core.c:2474
 bpf_migrate_filter net/core/filter.c:1308 [inline]
 bpf_prepare_filter+0x117f/0x1320 net/core/filter.c:1356
 sk_attach_filter+0x24/0x140 net/core/filter.c:1540
 sk_setsockopt+0x2226/0x2b20 net/core/sock.c:1320
 do_sock_setsockopt+0x11b/0x1a0 net/socket.c:2318
 __sys_setsockopt net/socket.c:2345 [inline]
 __do_sys_setsockopt net/socket.c:2354 [inline]
 __se_sys_setsockopt net/socket.c:2351 [inline]
 __x64_sys_setsockopt+0x182/0x200 net/socket.c:2351
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f13db59e159
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:00007f13dc3ad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f13db825fa0 RCX: 00007f13db59e159
RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f13db63506b R08: 0000000000000010 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f13db826038 R14: 00007f13db825fa0 R15: 00007ffcd24872a8
 </TASK>