rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10542/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=51593, q=279 ncpus=2)
task:syz-executor.0 state:R running task stack:25760 pid:10542 tgid:10540 ppid:5811 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1682 [inline]
zap_pmd_range mm/memory.c:1730 [inline]
zap_pud_range mm/memory.c:1759 [inline]
zap_p4d_range mm/memory.c:1780 [inline]
unmap_page_range+0xbc7/0x4220 mm/memory.c:1801
unmap_single_vma+0x194/0x2b0 mm/memory.c:1847
unmap_vmas+0x22f/0x490 mm/memory.c:1891
exit_mmap+0x1b8/0xb20 mm/mmap.c:3341
__mmput+0x12a/0x4d0 kernel/fork.c:1346
mmput+0x62/0x70 kernel/fork.c:1368
exit_mm kernel/exit.c:565 [inline]
do_exit+0x9b7/0x2ba0 kernel/exit.c:861
do_group_exit+0xd3/0x2a0 kernel/exit.c:1023
get_signal+0x2616/0x2710 kernel/signal.c:2909
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f921067cee9
RSP: 002b:00007f92114a3178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f92107abf88 RCX: 00007f921067cee9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f92107abf88
RBP: 00007f92107abf80 R08: 00007f92114a36c0 R09: 00007f92114a36c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92107abf8c
R13: 000000000000000b R14: 00007fff428f6910 R15: 00007fff428f69f8
rcu: rcu_preempt kthread starved for 10521 jiffies! g51593 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 10555 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-12393-g9b62e02e6336 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5282
Code: a9 0a 00 00 44 8b 0d 17 51 86 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 d9 e6 36 00 fb 65 48 8b 1d e0 99 a5 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900033af820 EFLAGS: 00000202
RAX: 0000000000204e4f RBX: ffff888024a58000 RCX: 1ffffffff1fc8361
RDX: 0000000000000000 RSI: ffffffff8b2cade0 RDI: ffffffff8b8fff00
RBP: ffffc900033af868 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe45d97 R11: 0000000000000000 R12: ffff8880b933f978
R13: ffff88807db48000 R14: 0000000000000000 R15: ffff8880b923ec00
FS: 00007f01916916c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01916b1f00 CR3: 00000000501b8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0xf1d/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_add+0x4/0x150 kernel/sched/core.c:5873
Code: cc cc e8 5f c7 89 09 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> c7 c0 e0 9b b4 94 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53
RSP: 0018:ffffc900033afae0 EFLAGS: 00000202
RAX: 000000000000400e RBX: ffff888024a58000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b2cade0 RDI: 0000000000000001
RBP: ffffed100494b000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8fe45d97 R11: 0000000000000000 R12: ffff888024a5802c
R13: ffff888024a58000 R14: ffffffff81814371 R15: dffffc0000000000
__schedule_loop kernel/sched/core.c:6821 [inline]
schedule+0xe0/0x350 kernel/sched/core.c:6837
futex_wait_queue+0xfc/0x1f0 kernel/futex/waitwake.c:370
__futex_wait+0x291/0x3c0 kernel/futex/waitwake.c:669
futex_wait+0xe9/0x380 kernel/futex/waitwake.c:697
do_futex+0x22b/0x350 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex kernel/futex/syscalls.c:160 [inline]
__x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f019087cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0191691178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f01909ac058 RCX: 00007f019087cee9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f01909ac058
RBP: 00007f01909ac050 R08: 00007f01916916c0 R09: 00007f01916916c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01909ac05c
R13: 000000000000006e R14: 00007ffddccb4000 R15: 00007ffddccb40e8