rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5511/1:b..l rcu: (detected by 1, t=10502 jiffies, g=10273, q=836 ncpus=2) task:syz-executor.3 state:R running task stack:25008 pid:5511 tgid:5508 ppid:5112 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_is_held_type+0x13b/0x190 Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90002eef718 EFLAGS: 00000206 RAX: 06e211e966066b00 RBX: 0000000000000000 RCX: ffff888020c75a00 RDX: ffff888020c75a00 RSI: ffffffff8bcacd00 RDI: ffffffff8c1ff280 RBP: 0000000000000003 R08: ffffffff8b8197f7 R09: 1ffffffff25f56b0 R10: dffffc0000000000 R11: fffffbfff25f56b1 R12: 0000000000000246 R13: ffff888020c75a00 R14: 00000000ffffffff R15: ffff8880792383c8 lock_is_held include/linux/lockdep.h:231 [inline] xa_entry include/linux/xarray.h:1220 [inline] xas_descend lib/xarray.c:207 [inline] xas_load+0x19c/0x5c0 lib/xarray.c:245 filemap_get_entry+0x1fe/0x4e0 mm/filemap.c:1840 shmem_get_folio_gfp+0x2a8/0x1f50 mm/shmem.c:1982 shmem_get_folio mm/shmem.c:2160 [inline] shmem_write_begin+0x170/0x4d0 mm/shmem.c:2743 generic_perform_write+0x324/0x640 mm/filemap.c:4015 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2919 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa74/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f48d267bcaf RSP: 002b:00007f48d34dbe80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f48d267bcaf RDX: 0000000001000000 RSI: 00007f48c8400000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600 R10: 0000000020012cc2 R11: 0000000000000293 R12: 0000000000000003 R13: 00007f48d34dbf80 R14: 00007f48d34dbf40 R15: 00007f48c8400000