rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6302/1:b..l rcu: (detected by 1, t=10503 jiffies, g=10297, q=2549 ncpus=2) task:syz.3.102 state:R running task stack:25288 pid:6302 tgid:6301 ppid:5863 task_flags:0x400140 flags:0x00004006 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:697 RIP: 0010:addr_has_metadata mm/kasan/kasan.h:333 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:188 [inline] RIP: 0010:kasan_check_range+0x43/0x2c0 mm/kasan/generic.c:200 Code: 4c 8d 04 37 49 39 f8 0f 82 82 02 00 00 49 b9 00 00 00 00 00 80 ff ff eb 11 cc cc cc f3 0f 1e fa 49 b9 00 00 00 00 00 00 00 ff 0f 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 49 ba RSP: 0018:ffffc9000b6ef570 EFLAGS: 00000202 RAX: ffffffff822dca01 RBX: dffffc0000000000 RCX: ffffffff822dca33 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801e8043d0 RBP: ffff88801e8043d8 R08: ffff88801e8043d8 R09: ffff800000000000 R10: dffffc0000000000 R11: ffffed1003d00871 R12: 00000000000780d9 R13: 0000000000000008 R14: 0000000000000001 R15: ffff88801e8043d0 instrument_write include/linux/instrumented.h:40 [inline] ___clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:44 [inline] __update_page_owner_free_handle+0x1b3/0x470 mm/page_owner.c:276 __reset_page_owner+0x85/0x1f0 mm/page_owner.c:309 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+0x146/0x170 mm/slub.c:3218 put_cpu_partial+0x17c/0x250 mm/slub.c:3293 __slab_free+0x2b9/0x390 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:349 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+0x210/0x4b0 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:913 [inline] kzalloc_noprof include/linux/slab.h:1043 [inline] copy_splice_read+0x143/0xa50 fs/splice.c:337 do_splice_read fs/splice.c:981 [inline] splice_direct_to_actor+0x4d0/0xcc0 fs/splice.c:1086 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1230 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 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: 0033:0x7fcdcc58ebe9 RSP: 002b:00007fcdcd4b9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fcdcc7c5fa0 RCX: 00007fcdcc58ebe9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 RBP: 00007fcdcc611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcdcc7c6038 R14: 00007fcdcc7c5fa0 R15: 00007ffed490df98