rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5798/4:b..l rcu: (detected by 1, t=10502 jiffies, g=212713, q=3953 ncpus=2) task:syz-executor state:R running task stack:20600 pid:5798 tgid:5798 ppid:1 task_flags:0x400140 flags:0x00080003 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x16f3/0x4c20 kernel/sched/core.c:6929 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:100 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0xa5/0x2c0 mm/kasan/generic.c:200 Code: 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 0f 85 de 01 00 00 <49> ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd 83 e5 07 0f 84 b5 RSP: 0018:ffffc90004bdf3c8 EFLAGS: 00000246 RAX: ffffffff82096701 RBX: ffffffffffffffff RCX: ffffffff8209673e RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea000126e134 RBP: ffffc90004bdf690 R08: ffffea000126e137 R09: 1ffffd400024dc26 R10: dffffc0000000000 R11: fffff9400024dc26 R12: 0000000000000001 R13: ffffea000126e100 R14: fffff9400024dc27 R15: 1ffffd400024dc26 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] page_ref_count include/linux/page_ref.h:67 [inline] folio_ref_count include/linux/page_ref.h:89 [inline] folio_get include/linux/mm.h:1386 [inline] copy_present_ptes mm/memory.c:1157 [inline] copy_pte_range mm/memory.c:1303 [inline] copy_pmd_range+0x7fe/0x7950 mm/memory.c:1390 copy_pud_range mm/memory.c:1427 [inline] copy_p4d_range mm/memory.c:1451 [inline] copy_page_range+0xaff/0x1170 mm/memory.c:1539 dup_mmap+0xf5b/0x1ae0 mm/mmap.c:1834 dup_mm kernel/fork.c:1489 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1541 copy_process+0x1704/0x3ae0 kernel/fork.c:2181 kernel_clone+0x224/0x7c0 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f56b8df5e13 RSP: 002b:00007ffd0195ffc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f56b8df5e13 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 00005555723b57d0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000244cf4 R15: 00007ffd01960160