rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5599/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=61329, q=112 ncpus=2)
task:syz-executor state:R running task stack:21928 pid:5599 tgid:5599 ppid:5596 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:6021
Code: ff ff ff ff 65 0f c1 15 d1 95 ba 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc c3 cc cc cc cc 31 c0
RSP: 0018:ffffc90002f07630 EFLAGS: 00000296
RAX: 0000000000000001 RBX: ffffffff8edec5a0 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8e36911a RDI: ffffffff8c623a80
RBP: ffff88807a42cb00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff88807a42d6d8 R15: 0000000000000001
xa_entry include/linux/xarray.h:1226 [inline]
xas_reload include/linux/xarray.h:1624 [inline]
find_get_entry mm/filemap.c:2102 [inline]
find_lock_entries+0x860/0x1190 mm/filemap.c:2189
shmem_undo_range+0x212/0x1570 mm/shmem.c:1143
shmem_truncate_range mm/shmem.c:1289 [inline]
shmem_evict_inode+0x3b1/0xca0 mm/shmem.c:1420
evict+0x3c2/0xad0 fs/inode.c:822
iput_final fs/inode.c:2014 [inline]
iput.part.0+0x989/0x1050 fs/inode.c:2063
iput+0x35/0x40 fs/inode.c:2029
filename_unlinkat+0x466/0x730 fs/namei.c:5723
__do_sys_unlink fs/namei.c:5754 [inline]
__se_sys_unlink fs/namei.c:5751 [inline]
__x64_sys_unlink+0x46/0x70 fs/namei.c:5751
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71ced9d287
RSP: 002b:00007ffceb15f568 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f71ced9d287
RDX: 00007ffceb15f590 RSI: 00007ffceb15f620 RDI: 00007ffceb15f620
RBP: 00007ffceb15f620 R08: 00007ffceb160620 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffceb1606b0
R13: 00007f71cee34d23 R14: 000000000007c2b7 R15: 00007ffceb1606f0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10489 jiffies! g61329 f0x0 RCU_GP_WAIT_FQS(5) ->state=I
rcu: Possible timer handling issue on cpu=0 timer-softirq=34905
rcu: rcu_preempt kthread starved for 10490 jiffies! g61329 f0x0 RCU_GP_WAIT_FQS(5) ->state=I ->cpu=0
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:I stack:28840 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
__schedule_loop kernel/sched/core.c:7361 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7376
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9709 Comm: syz.2.1119 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:lock_is_held_type+0x2f/0x140 kernel/locking/lockdep.c:6001
Code: 0d ca be 72 05 b8 ff ff ff ff 85 c9 0f 84 ed 00 00 00 65 8b 15 8a 96 ba 08 85 d2 0f 85 de 00 00 00 41 57 41 56 41 55 41 54 55 <53> 48 83 ec 08 65 48 8b 2d ac 4f ba 08 8b 95 a4 0b 00 00 85 d2 0f
RSP: 0018:ffffc90000007db0 EFLAGS: 00000046
RAX: 00000000ffffffff RBX: ffff88802cfef300 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff88802cfef2c0
RBP: ffff88807a345000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89db0990 R14: ffff8880b8428640 R15: ffff8880b8428690
FS: 0000555560ea7500(0000) GS:ffff888123b4e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ff23877c0 CR3: 0000000035474000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000063235cd5
DR3: 0000000000007000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:249 [inline]
advance_sched+0x7a4/0xd20 net/sched/sch_taprio.c:936
__run_hrtimer kernel/time/hrtimer.c:2074 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2131
hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2250
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:finish_task_switch.isra.0+0x2ca/0x10d0 kernel/sched/core.c:5384
Code: b6 0a 00 00 41 c7 87 20 0e 00 00 00 00 00 00 e9 47 04 00 00 49 8d 7f 48 e8 f3 6a fe 09 e8 be 3f 3d 00 fb 48 8d bb 18 17 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84
RSP: 0018:ffffc90004bcf8b8 EFLAGS: 00000202
RAX: 000000000000131f RBX: ffff88807ea9cb00 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8e38f5e4 RDI: ffff88807ea9e218
RBP: ffffc90004bcf910 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88807ec88000
R13: 0000000000000001 R14: ffffffff91458f04 R15: ffff8880b843bf00
context_switch kernel/sched/core.c:5536 [inline]
__schedule+0x1261/0x6920 kernel/sched/core.c:7284
preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
class_preempt_destructor include/linux/preempt.h:496 [inline]
try_to_wake_up+0x70a/0x1c90 kernel/sched/core.c:4276
wake_up_process kernel/sched/core.c:4570 [inline]
wake_up_q+0xa1/0x130 kernel/sched/core.c:1183
futex_wake+0x4f4/0x5e0 kernel/futex/waitwake.c:225
do_futex+0x2b2/0x440 kernel/futex/syscalls.c:138
__do_sys_futex kernel/futex/syscalls.c:210 [inline]
__se_sys_futex kernel/futex/syscalls.c:191 [inline]
__x64_sys_futex+0x34f/0x4d0 kernel/futex/syscalls.c:191
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ff239e199
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffac260618 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8ff239e199
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f8ff2625fa8
RBP: 00000000000000f1 R08: 0000000000000009 R09: 0000000000000000
R10: 00007f8ff2625fa0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ff2625fac R14: 00007f8ff2625fa8 R15: 00007f8ff2625fa0