rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5828/2:b..l rcu: (detected by 1, t=10503 jiffies, g=12365, q=804 ncpus=2) task:dhcpcd-run-hook state:R running task stack:28320 pid:5828 tgid:5828 ppid:5824 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:kasan_check_range+0x12/0x1a0 mm/kasan/generic.c:188 Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 <44> 0f b6 c2 48 01 f0 55 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff RSP: 0018:ffffc90003417890 EFLAGS: 00000206 RAX: ffffc90003417930 RBX: 0000000000000014 RCX: ffffffff84398bd7 RDX: 0000000000000001 RSI: 0000000000000014 RDI: ffffc90003417930 RBP: ffff88802954668c R08: 0000000000000000 R09: ffffed10052a8cd3 R10: ffff88802954669f R11: 0000000000000000 R12: ffffc90003417930 R13: 0000000000000035 R14: ffffc90003417930 R15: 0000000016040057 __asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106 avc_has_perm_noaudit+0xe7/0x3a0 security/selinux/avc.c:1165 selinux_inode_permission+0x361/0x590 security/selinux/hooks.c:3120 security_inode_permission+0xbb/0x120 security/security.c:2216 inode_permission fs/namei.c:543 [inline] inode_permission+0x17a/0x5f0 fs/namei.c:510 may_lookup fs/namei.c:1746 [inline] link_path_walk.part.0.constprop.0+0x1d7/0xd40 fs/namei.c:2352 link_path_walk fs/namei.c:2336 [inline] path_openat+0x238/0x2d20 fs/namei.c:3882 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f985f6cd477 RSP: 002b:00007ffde1644758 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f985f6cd477 RDX: 0000000000090800 RSI: 00005578d9ed0f20 RDI: 00000000ffffff9c RBP: 00005578d9ec5af0 R08: 0000000000090800 R09: 00005578d9ed0f20 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffde16448b8 R13: 00005578d9ec5ae8 R14: 00005578d9ed0f47 R15: 0000000000000030 rcu: rcu_preempt kthread starved for 10530 jiffies! g12365 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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 5826 Comm: syz-executor.0 Not tainted 6.11.0-rc3-syzkaller-00144-ge724918b3786 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 76 d3 54 f6 48 89 df e8 8e 50 55 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 b5 c3 46 f6 65 8b 05 46 44 f0 74 85 c0 74 16 5b RSP: 0018:ffffc9000317ed88 EFLAGS: 00000246 RAX: 0000000000000016 RBX: ffff88823fff8480 RCX: 1ffffffff28c5950 RDX: 0000000000000000 RSI: ffffffff8b4cc4c0 RDI: ffffffff8bb09380 RBP: 0000000000000202 R08: 0000000000000001 R09: fffffbfff28c54d8 R10: ffffffff9462a6c7 R11: dffffc0000000000 R12: dffffc0000000000 R13: ffff8880b9345080 R14: 000000000000000f R15: 0000000000000002 FS: 00007f77c7c7a6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005578d9ed23b0 CR3: 0000000022f7c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] rmqueue_bulk mm/page_alloc.c:2281 [inline] __rmqueue_pcplist+0xc5d/0x1540 mm/page_alloc.c:2957 rmqueue_pcplist mm/page_alloc.c:2999 [inline] rmqueue mm/page_alloc.c:3036 [inline] get_page_from_freelist+0x7d0/0x2e50 mm/page_alloc.c:3439 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4700 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2321 allocate_slab mm/slub.c:2484 [inline] new_slab+0x84/0x260 mm/slub.c:2537 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] kmem_cache_alloc_node_noprof+0xed/0x310 mm/slub.c:4080 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:583 pskb_expand_head+0x240/0x11f0 net/core/skbuff.c:2259 skb_ensure_writable net/core/skbuff.c:6128 [inline] skb_ensure_writable+0x2e7/0x450 net/core/skbuff.c:6120 __bpf_try_make_writable net/core/filter.c:1676 [inline] bpf_try_make_writable net/core/filter.c:1682 [inline] bpf_try_make_head_writable net/core/filter.c:1690 [inline] ____bpf_clone_redirect net/core/filter.c:2468 [inline] bpf_clone_redirect+0x141/0x3d0 net/core/filter.c:2446 ___bpf_prog_run+0x3e51/0xabd0 kernel/bpf/core.c:2010 __bpf_prog_run512+0xb7/0x100 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x49d/0xa90 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0xb6e/0x20f0 net/bpf/test_run.c:1094 bpf_prog_test_run kernel/bpf/syscall.c:4313 [inline] __sys_bpf+0x10d2/0x4a00 kernel/bpf/syscall.c:5728 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f77c6e7dca9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f77c7c7a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f77c6fabf80 RCX: 00007f77c6e7dca9 RDX: 0000000000000050 RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007f77c6ec947e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f77c6fabf80 R15: 00007ffe5242d518 sched: RT throttling activated