rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5198/1:b..l (detected by 0, t=10503 jiffies, g=17285, q=174 ncpus=2) task:modprobe state:R running task stack:22616 pid:5198 ppid:11 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6558 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870 irqentry_exit+0x53/0x80 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:__sanitizer_cov_trace_switch+0x4/0xe0 kernel/kcov.c:317 Code: 49 ff c2 4c 89 12 48 c7 44 11 08 07 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 c3 0f 1f 80 00 00 00 00 41 57 41 56 <41> 54 53 48 8b 46 08 48 83 c0 f8 48 c1 c0 3d 48 83 f8 07 0f 87 ac RSP: 0018:ffffc900044b77c8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000075 RCX: ffff888023d08000 RDX: 0000000000000000 RSI: ffffffff8d23fe90 RDI: 0000000000000075 RBP: ffffc900044b7910 R08: 0000000000000001 R09: ffffffff81f4ec70 R10: 0000000000000002 R11: ffff888023d08000 R12: dffffc0000000000 R13: ffff88801b761121 R14: ffff88801b761121 R15: ffffc900044b7bd8 link_path_walk+0x110/0xee0 fs/namei.c:2252 path_openat+0x23d/0x2e60 fs/namei.c:3781 do_filp_open+0x230/0x480 fs/namei.c:3812 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6e2fdf2a46 RSP: 002b:00007fffd6896a18 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fffd6896c78 RCX: 00007f6e2fdf2a46 RDX: 0000000000080000 RSI: 00007fffd6896a90 RDI: 00000000ffffff9c RBP: 00007fffd6896a80 R08: 0000000000080000 R09: 00007fffd6896a90 R10: 0000000000000000 R11: 0000000000000287 R12: 00007fffd6896a90 R13: 0000000000000009 R14: 00007fffd6896c5f R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10534 jiffies! g17285 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:25528 pid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 rcu: Stack dump where RCU GP kthread last ran: CPU: 0 PID: 5218 Comm: syz-executor.2 Not tainted 6.1.92-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0033:0x7fba40aa4670 Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a 9b 04 00 e8 25 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48 RSP: 002b:00007fba418d0b38 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007fba40babf80 RCX: 00007fba40a7cee9 RDX: 00007fba418d0b40 RSI: 00007fba418d0c70 RDI: 0000000000000021 RBP: 00007fba40ac949e R08: 0000000020048000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fba40babf80 R15: 00007ffd49c4a198 FS: 00007fba418d16c0 GS: 0000000000000000