rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7760
rcu: 	(detected by 0, t=10502 jiffies, g=23945, q=318 ncpus=2)
task:syz.1.656       state:R  running task     stack:25408 pid:7760  tgid:7760  ppid:5840   task_flags:0x400040 flags:0x0000400a
Call Trace:
 <TASK>
 </TASK>
rcu: rcu_preempt kthread starved for 10517 jiffies! g23945 f0x0 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:26888 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 7769 Comm: syz.0.659 Not tainted 6.15.0-rc4-syzkaller-g149e0cf4c99c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x6ce/0xb60 kernel/locking/qspinlock.c:325
Code: ff ff 66 c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 84 c0 75 46 80 3b 00 74 09 f3 90 <41> ff c6 75 d3 eb 4b 48 89 df be 02 00 00 00 e8 de 3a c9 f6 48 8d
RSP: 0018:ffffc90003447840 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff888148c028c0 RCX: 1ffff11029180518
RDX: ffffc900048e2000 RSI: 000000000007ffff RDI: ffff8880b883aa94
RBP: ffffc90003447958 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e
R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 1ffffffff1bb48a4
R13: 0000000000000000 R14: 00000000ffff8781 R15: 1ffff11029180518
FS:  00007f04ddd5e6c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30711ff8 CR3: 000000005eb12000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:572 [inline]
 queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 d_instantiate+0x64/0xa0 fs/dcache.c:1937
 alloc_path_pseudo fs/file_table.c:364 [inline]
 alloc_file_pseudo+0xf6/0x210 fs/file_table.c:376
 __anon_inode_getfile fs/anon_inodes.c:109 [inline]
 __anon_inode_getfd fs/anon_inodes.c:234 [inline]
 anon_inode_getfd+0xca/0x1b0 fs/anon_inodes.c:269
 bpf_prog_load+0x1465/0x1930 kernel/bpf/syscall.c:3002
 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5836
 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5941 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04dcf8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04ddd5e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f04dd1b5fa0 RCX: 00007f04dcf8e969
RDX: 0000000000000090 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f04dd010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f04dd1b5fa0 R15: 00007fffc170f588
 </TASK>