rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5235/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=6717, q=900 ncpus=2)
task:syz-executor.4 state:R running task stack:24560 pid:5235 tgid:5234 ppid:5121 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
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_acquire+0x264/0x550 kernel/locking/lockdep.c:5821
Code: 2b 00 74 08 4c 89 f7 e8 3a 18 8a 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900047a7240 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920008f4e54 RCX: 88f6501afa7c2f00
RDX: dffffc0000000000 RSI: ffffffff8bcad360 RDI: ffffffff8c200e00
RBP: ffffc900047a7398 R08: ffffffff92fc96c7 R09: 1ffffffff25f92d8
R10: dffffc0000000000 R11: fffffbfff25f92d9 R12: 1ffff920008f4e50
R13: dffffc0000000000 R14: ffffc900047a72a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
page_ext_get+0x3d/0x2a0 mm/page_ext.c:521
__set_page_owner+0x9e/0x800 mm/page_owner.c:322
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1470
prep_new_page mm/page_alloc.c:1478 [inline]
get_page_from_freelist+0x2cbd/0x2d70 mm/page_alloc.c:3457
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4715
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2281
shmem_alloc_folio mm/shmem.c:1723 [inline]
shmem_alloc_and_add_folio+0x2ce/0x14e0 mm/shmem.c:1783
shmem_get_folio_gfp+0xa22/0x2660 mm/shmem.c:2189
shmem_get_folio mm/shmem.c:2294 [inline]
shmem_fallocate+0x9bc/0x11d0 mm/shmem.c:3336
vfs_fallocate+0x553/0x6c0 fs/open.c:334
ksys_fallocate fs/open.c:357 [inline]
__do_sys_fallocate fs/open.c:365 [inline]
__se_sys_fallocate fs/open.c:363 [inline]
__x64_sys_fallocate+0xbd/0x110 fs/open.c:363
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: 0033:0x7fb52067cf69
RSP: 002b:00007fb5214ce0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fb5207b3f80 RCX: 00007fb52067cf69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fb5206da6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008008007 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb5207b3f80 R15: 00007ffd725c4938
rcu: rcu_preempt kthread starved for 10482 jiffies! g6717 f0x0 RCU_GP_DOING_FQS(6) ->state=0x0 ->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:R running task stack:26576 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:185 [inline]
RIP: 0010:need_resched include/linux/sched.h:2104 [inline]
RIP: 0010:preempt_schedule_common+0x92/0xd0 kernel/sched/core.c:6716
Code: 42 80 3c 38 00 74 08 48 89 df e8 39 4f 65 f6 4c 89 33 bf 01 00 00 00 e8 3c b0 ff ff 65 8b 05 2d b2 6c 74 65 ff 0d 26 b2 6c 74 <65> 48 8b 1c 25 00 d6 03 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 0f
RSP: 0018:ffffc90000167ae0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8880176994c8 RCX: 1ffff9200002cf38
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: ffff8880176995f8
RBP: ffffc90000167b98 R08: ffffffff8fae026f R09: 1ffffffff1f5c04d
R10: dffffc0000000000 R11: fffffbfff1f5c04e R12: 1ffff9200002cf64
R13: 1ffff9200002cf80 R14: ffffffff8b972331 R15: dffffc0000000000
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
rcu_gp_fqs_loop+0x63e/0x1330 kernel/rcu/tree.c:2051
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5245 Comm: syz-executor.0 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:pvclock_read_begin arch/x86/include/asm/pvclock.h:24 [inline]
RIP: 0010:__pvclock_clocksource_read arch/x86/kernel/pvclock.c:76 [inline]
RIP: 0010:pvclock_clocksource_read_nowd+0x14/0xf0 arch/x86/kernel/pvclock.c:120
Code: cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 50 49 89 fe 8b 2f 31 45 89 fc 41 80 ff 40 73 5d 44 89 e1 48 d3 e3 4c 89 2c 24 48
RSP: 0018:ffffc900047f76b8 EFLAGS: 00000086
RAX: ffffffff81354cfd RBX: ffff88802b3846e0 RCX: 0000000000040000
RDX: ffffc9000b172000 RSI: 000000000003ffff RDI: ffffffff929bc000
RBP: 0000000000000006 R08: 0000000000000003 R09: fffff520008feee8
R10: dffffc0000000000 R11: fffff520008feee8 R12: ffff88802b384704
R13: 1ffff110056708db R14: ffffffff929bc000 R15: ffff88802b3846d8
FS: 00007f442616b6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000061e80 CR3: 00000000797c0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kvm_sched_clock_read+0x11/0x20 arch/x86/kernel/kvmclock.c:91
sched_clock+0x19/0x70 arch/x86/kernel/tsc.c:283
__lock_pin_lock kernel/locking/lockdep.c:5587 [inline]
lock_pin_lock+0x24f/0x440 kernel/locking/lockdep.c:5909
rq_pin_lock kernel/sched/sched.h:1632 [inline]
rq_lock kernel/sched/sched.h:1714 [inline]
__schedule+0x3ca/0x4a20 kernel/sched/core.c:6437
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370
__futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
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: 0033:0x7f442547cf69
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:00007f442616b178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f44255b4128 RCX: 00007f442547cf69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f44255b4128
RBP: 00007f44255b4120 R08: 00007f442616b6c0 R09: 00007f442616b6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f44255b412c
R13: 000000000000006e R14: 00007fffc0a2ddc0 R15: 00007fffc0a2dea8