rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5845/1:b..l rcu: (detected by 0, t=10503 jiffies, g=38117, q=2323695 ncpus=2) task:syz-executor state:R running task stack:22440 pid:5845 tgid:5845 ppid:5844 task_flags:0x400100 flags:0x20004002 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline] RIP: 0010:unwind_next_frame+0x214/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: ef 08 8b 15 1e 2f 4b 0c 8d 42 ff 44 39 f8 0f 86 65 18 00 00 44 89 f8 4c 8d 2c 85 70 0a e0 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 48 89 eb 0f 85 1c 1c 00 00 45 8b 6d 00 44 89 f8 ff c0 48 8d RSP: 0018:ffffc90003edf718 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: 0000000000000001 RCX: e327d0effd60ec00 RDX: 00000000000a7d44 RSI: ffffffff8be33660 RDI: ffffffff8be33620 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90003edf838 R11: ffffffff81ac3810 R12: ffffffff82183303 R13: ffffffff90e46b3c R14: ffffc90003edf7e8 R15: 0000000000011833 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 discard_slab mm/slub.c:2753 [inline] __put_partials+0x156/0x1a0 mm/slub.c:3218 put_cpu_partial+0x17c/0x250 mm/slub.c:3293 __slab_free+0x2d5/0x3c0 mm/slub.c:4550 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_noprof+0x224/0x4f0 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:909 [inline] kmalloc_array_noprof include/linux/slab.h:948 [inline] alloc_pipe_info+0x1fd/0x4d0 fs/pipe.c:815 get_pipe_inode fs/pipe.c:894 [inline] create_pipe_files+0x8a/0x7e0 fs/pipe.c:926 __do_pipe_flags+0x46/0x1f0 fs/pipe.c:988 do_pipe2+0x9c/0x170 fs/pipe.c:1036 __do_sys_pipe2 fs/pipe.c:1054 [inline] __se_sys_pipe2 fs/pipe.c:1052 [inline] __ia32_sys_pipe2+0x5a/0x70 fs/pipe.c:1052 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f18539 RSP: 002b:00000000ffb05818 EFLAGS: 00000206 ORIG_RAX: 000000000000014b RAX: ffffffffffffffda RBX: 00000000ffb05864 RCX: 0000000000000000 RDX: 00000000f73a4ff4 RSI: 0000000057c523f0 RDI: 000000000004b1c0 RBP: 00000000ffb058c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000