rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1):
P13970/1:b..l
P13980/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=66961, q=1182 ncpus=2)
task:syz.4.2743 state:R
running task stack:25360 pid:13980 tgid:13979 ppid:11526 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 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_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:ffffc90009317738 EFLAGS: 00000206
RAX: 25a486f839be8a00 RBX: 0000000000000000 RCX: ffff88802a31bc00
RDX: ffff88802a31bc00 RSI: ffffffff8bcadaa0 RDI: ffffffff8c1f9540
RBP: 0000000000000004 R08: ffffffff8b805e67 R09: 1ffffffff25f74c0
R10: dffffc0000000000 R11: fffffbfff25f74c1 R12: 0000000000000246
R13: ffff88802a31bc00 R14: 00000000ffffffff R15: ffff88801ea81de0
lock_is_held include/linux/lockdep.h:249 [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+0x1f0/0x3b0 mm/filemap.c:1840
shmem_get_folio_gfp+0x2a8/0x1f50 mm/shmem.c:1993
shmem_get_folio mm/shmem.c:2171 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2754
generic_perform_write+0x399/0x840 mm/filemap.c:4019
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 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: 0033:0x7f6ddb775b59
RSP: 002b:00007f6ddc4ec048 EFLAGS: 00000246
ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6ddb905f60 RCX: 00007f6ddb775b59
RDX: 73336958c4e6a83a RSI: 0000000020000bc0 RDI: 0000000000000004
RBP: 00007f6ddb7e4e5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6ddb905f60 R15: 00007ffe5f4c7148
task:syz.0.2739 state:R
running task stack:24672 pid:13970 tgid:13970 ppid:5094 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 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_release+0x658/0xa30 kernel/locking/lockdep.c:5784
Code: 3c 3b 00 74 08 4c 89 f7 e8 f5 95 86 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900047ef460 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920008fde9e RCX: ffffc900047ef403
RDX: 0000000000000001 RSI: ffffffff8bcadaa0 RDI: ffffffff8c1f9540
RBP: ffffc900047ef590 R08: ffffffff8faddeaf R09: 1ffffffff1f5bbd5
R10: dffffc0000000000 R11: fffffbfff1f5bbd6 R12: 1ffff920008fde98
R13: 0000000000000246 R14: ffffc900047ef4f0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:337 [inline]
rcu_read_unlock include/linux/rcupdate.h:870 [inline]
pte_unmap include/linux/pgtable.h:115 [inline]
zap_pte_range mm/memory.c:1676 [inline]
zap_pmd_range mm/memory.c:1724 [inline]
zap_pud_range mm/memory.c:1753 [inline]
zap_p4d_range mm/memory.c:1774 [inline]
unmap_page_range+0x36d2/0x40f0 mm/memory.c:1795
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1885
exit_mmap+0x264/0xc80 mm/mmap.c:3341
__mmput+0x115/0x380 kernel/fork.c:1343
exit_mm+0x220/0x310 kernel/exit.c:566
do_exit+0x9b2/0x27f0 kernel/exit.c:864
do_group_exit+0x207/0x2c0 kernel/exit.c:1026
__do_sys_exit_group kernel/exit.c:1037 [inline]
__se_sys_exit_group kernel/exit.c:1035 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1035
x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f165cf75b59
RSP: 002b:00007fff7c0e5638 EFLAGS: 00000246
ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f165cf75b59
RDX: 0000001b31a20000 RSI: 000000000000001b RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000006 R09: 0000000000000000
R10: 00000000003f9b58 R11: 0000000000000246 R12: 00007fff7c0e5720
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff7c0e5720
rcu: rcu_preempt kthread starved for 1655 jiffies! g66961 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:R
running task stack:24912 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 0 Comm: swapper/1 Not tainted 6.10.0-syzkaller-09703-gd7e78951a8b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d5 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 65 aa a3 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff8880176e0000 RBX: ffff88801baab064 RCX: 0000000002137af9
RDX: 0000000000000001 RSI: ffff88801baab000 RDI: ffff88801baab064
RBP: 000000000003a4b8 R08: ffff8880b9537c7b R09: 1ffff110172a6f8f
R10: dffffc0000000000 R11: ffffffff8b8582d0 R12: ffff88801a737000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eac9680
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ddc4aad58 CR3: 000000002d974000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x147