rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17583/1:b..l
rcu: (detected by 1, t=10506 jiffies, g=78429, q=197 ncpus=2)
task:syz.1.4076 state:R running task stack:25816 pid:17583 tgid:17582 ppid:14799 task_flags:0x40044c flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6786
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6966
preempt_schedule+0xae/0xc0 kernel/sched/core.c:6990
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1765 [inline]
zap_pmd_range mm/memory.c:1827 [inline]
zap_pud_range mm/memory.c:1856 [inline]
zap_p4d_range mm/memory.c:1877 [inline]
unmap_page_range+0x3842/0x41c0 mm/memory.c:1898
unmap_single_vma mm/memory.c:1941 [inline]
unmap_vmas+0x399/0x580 mm/memory.c:1985
exit_mmap+0x248/0xb50 mm/mmap.c:1284
__mmput+0x118/0x420 kernel/fork.c:1121
exit_mm+0x1da/0x2c0 kernel/exit.c:581
do_exit+0x648/0x22e0 kernel/exit.c:952
do_group_exit+0x21c/0x2d0 kernel/exit.c:1105
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fecc5d8e929
RSP: 002b:00007fecc6be10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fecc5fb5fa8 RCX: 00007fecc5d8e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fecc5fb5fac
RBP: 00007fecc5fb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fecc5fb5fac
R13: 0000000000000000 R14: 00007fff8e3e1dc0 R15: 00007fff8e3e1ea8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g78429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=50173
rcu: rcu_preempt kthread starved for 10506 jiffies! g78429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:27320 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
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: 17569 Comm: syz.2.4072 Not tainted 6.16.0-rc5-syzkaller-00276-g5d5d62298b8b #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:advance_sched+0x13a/0xc90 net/sched/sch_taprio.c:925
Code: e9 03 48 b8 00 00 00 00 00 fc ff df 48 89 8c 24 80 00 00 00 80 3c 01 00 74 08 48 89 df e8 1e e1 94 f8 48 89 9c 24 88 00 00 00 <4c> 8b 3b e8 5e 7d e0 01 89 c3 31 ff 89 c6 e8 23 65 31 f8 85 db 74
RSP: 0018:ffffc90000007c70 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8880694fa328 RCX: 1ffff1100d29f465
RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f7c R12: ffff8880694fa340
R13: ffff8880694fa000 R14: dffffc0000000000 R15: ffff888076afa8d8
FS: 00007f4860c896c0(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31116ff8 CR3: 000000003dbf4000 CR4: 0000000000350ef0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:19 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline]
RIP: 0010:seqcount_lockdep_reader_access+0x7d/0x1c0 include/linux/seqlock.h:71
Code: bf 00 00 00 00 00 fc ff df 4b 89 04 3e 66 43 c7 44 3e 09 f3 f3 43 c6 44 3e 0b f3 e8 bd 6a 11 00 48 c7 44 24 40 00 00 00 00 9c <8f> 44 24 40 4c 8b 64 24 40 fa 4c 89 e6 48 81 e6 00 02 00 00 31 ff
RSP: 0018:ffffc9000b6d7158 EFLAGS: 00000287
RAX: ffffffff81aec8b3 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000c662000 RSI: 000000000000ca7c RDI: 000000000000ca7d
RBP: ffffc9000b6d7208 R08: ffffffff8fa1f5f7 R09: 1ffffffff1f43ebe
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: ffff888076af9e00
R13: 1ffff110049733e0 R14: 1ffff920016dae2c R15: dffffc0000000000
ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:776
ktime_get_ns include/linux/timekeeping.h:174 [inline]
blk_time_get_ns block/blk.h:663 [inline]
blk_account_io_start+0x341/0x7d0 block/blk-mq.c:1102
blk_mq_bio_to_request block/blk-mq.c:2675 [inline]
blk_mq_submit_bio+0xa8c/0x22d0 block/blk-mq.c:3191
__submit_bio+0x207/0x5a0 block/blk-core.c:635
__submit_bio_noacct_mq block/blk-core.c:722 [inline]
submit_bio_noacct_nocheck+0x4ab/0xb50 block/blk-core.c:751
mpage_bio_submit_read fs/mpage.c:75 [inline]
mpage_read_folio+0x18e/0x220 fs/mpage.c:391
filemap_read_folio+0x117/0x380 mm/filemap.c:2412
do_read_cache_folio+0x350/0x590 mm/filemap.c:3894
do_read_cache_page mm/filemap.c:3960 [inline]
read_cache_page+0x5d/0x170 mm/filemap.c:3969
read_mapping_page include/linux/pagemap.h:966 [inline]
inode_read_data+0xa9/0x490 fs/ntfs3/inode.c:1041
ntfs_fill_super+0x39e1/0x40c0 fs/ntfs3/super.c:1532
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
vfs_get_tree+0x92/0x2b0 fs/super.c:1804
do_new_mount+0x24a/0xa40 fs/namespace.c:3902
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f485fd900ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4860c88e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4860c88ef0 RCX: 00007f485fd900ca
RDX: 0000200000000340 RSI: 0000200000000980 RDI: 00007f4860c88eb0
RBP: 0000200000000340 R08: 00007f4860c88ef0 R09: 0000000000800840
R10: 0000000000800840 R11: 0000000000000246 R12: 0000200000000980
R13: 00007f4860c88eb0 R14: 000000000001f881 R15: 0000200000000400