rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11229/1:b..l P6768/1:b..l P11281/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=52789, q=432 ncpus=2)
task:syz.1.1349 state:R running task stack:23952 pid:11281 tgid:11279 ppid:7117 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
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: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+0x3631/0x40f0 mm/memory.c:1795
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1885
exit_mmap+0x264/0xc80 mm/mmap.c:3341
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:567
do_exit+0x9aa/0x27e0 kernel/exit.c:863
do_group_exit+0x207/0x2c0 kernel/exit.c:1025
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x860 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+0xc9/0x360 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7218375bd9
RSP: 002b:00007f72191bd0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f7218503f68 RCX: 00007f7218375bd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f7218503f6c
RBP: 00007f7218503f60 R08: 7fffffffffffffff R09: 00007f72191bd6c0
R10: 0000000000034000 R11: 0000000000000246 R12: 00007f7218503f6c
R13: 000000000000000b R14: 00007fff0ff40d90 R15: 00007fff0ff40e78
task:syz-executor state:R running task stack:24672 pid:6768 tgid:6768 ppid:5081 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
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:unwind_get_return_address+0x76/0xc0 arch/x86/kernel/unwind_orc.c:369
Code: 08 48 89 df e8 4b ee ba 00 48 8b 3b e8 63 45 21 00 89 c5 31 ff 89 c6 e8 58 3d 55 00 85 ed 74 20 e8 0f 39 55 00 43 80 3c 37 00 <74> 08 48 89 df e8 20 ee ba 00 48 8b 03 eb 0e e8 f6 38 55 00 eb 05
RSP: 0018:ffffc90004c1f798 EFLAGS: 00000246
RAX: ffffffff8140eea1 RBX: ffffc90004c1f808 RCX: ffff888020e61e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8140ee98 R09: ffffffff8141095f
R10: 0000000000000003 R11: ffff888020e61e00 R12: ffff888020e61e00
R13: ffffffff8181dd90 R14: dffffc0000000000 R15: 1ffff92000983f01
arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1093 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2588
vfree+0x186/0x2e0 mm/vmalloc.c:3355
kcov_put kernel/kcov.c:429 [inline]
kcov_close+0x2b/0x50 kernel/kcov.c:525
__fput+0x24c/0x8a0 fs/file_table.c:422
task_work_run+0x251/0x310 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa27/0x27e0 kernel/exit.c:876
do_group_exit+0x207/0x2c0 kernel/exit.c:1025
__do_sys_exit_group kernel/exit.c:1036 [inline]
__se_sys_exit_group kernel/exit.c:1034 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1034
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: 0033:0x7febc1975bd9
RSP: 002b:00007ffe4e514b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007febc1975bd9
RDX: 00007febc1974720 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 00007febc1b04a18 R08: 00007ffe4e5128d7 R09: 000000000000000c
R10: 0000000000000019 R11: 0000000000000246 R12: 000000000000000c
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009
task:syz.0.1337 state:R running task stack:24464 pid:11229 tgid:11229 ppid:9508 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 2a 73 89 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:ffffc90004a3f240 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000947e54 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaccc0 RDI: ffffffff8c1fe9c0
RBP: ffffc90004a3f398 R08: ffffffff92fa7587 R09: 1ffffffff25f4eb0
R10: dffffc0000000000 R11: fffffbfff25f4eb1 R12: 1ffff92000947e50
R13: dffffc0000000000 R14: ffffc90004a3f2a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
page_ext_get+0x3d/0x2a0 mm/page_ext.c:521
__page_table_check_zero+0xb1/0x350 mm/page_table_check.c:148
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0xd36/0xea0 mm/page_alloc.c:2588
__folio_put+0x3b9/0x620 mm/swap.c:129
skb_page_unref include/linux/skbuff_ref.h:44 [inline]
__skb_frag_unref include/linux/skbuff_ref.h:57 [inline]
skb_release_data+0x467/0x880 net/core/skbuff.c:1102
skb_release_all net/core/skbuff.c:1173 [inline]
kfree_skb_add_bulk net/core/skbuff.c:1244 [inline]
kfree_skb_list_reason+0x328/0x7c0 net/core/skbuff.c:1266
skb_release_data+0x5a2/0x880 net/core/skbuff.c:1106
skb_release_all net/core/skbuff.c:1173 [inline]
__kfree_skb net/core/skbuff.c:1187 [inline]
kfree_skb_reason+0x1a3/0x3b0 net/core/skbuff.c:1223
kfree_skb include/linux/skbuff.h:1257 [inline]
kcm_release+0x121/0x5c0 net/kcm/kcmsock.c:1687
__sock_release net/socket.c:659 [inline]
sock_close+0xbe/0x240 net/socket.c:1421
__fput+0x24c/0x8a0 fs/file_table.c:422
task_work_run+0x251/0x310 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa27/0x27e0 kernel/exit.c:876
do_group_exit+0x207/0x2c0 kernel/exit.c:1025
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x860 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+0xc9/0x360 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5e081a7bc5
RSP: 002b:00007ffcc6b9d790 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f5e08303f60 RCX: 00007f5e081a7bc5
RDX: 00007ffcc6b9d7d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5e08305a60 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000006b9a6
R13: 0000000000000bea R14: 00007f5e08305a60 R15: 00007f5e08304110
rcu: rcu_preempt kthread starved for 10339 jiffies! g52789 f0x0 RCU_GP_WAIT_FQS(5) ->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:24640 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-rc6-syzkaller-00210-gd270dd21bee0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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:72 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d4 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d 55 5a a3 00 f3 0f 1e fa fb f4 e9 f4 23 2a 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e007ca8 EFLAGS: 00000246
RAX: ffffffff8e094680 RBX: ffff88801bad9864 RCX: 00000000002232b1
RDX: 0000000000000001 RSI: ffff88801bad9800 RDI: ffff88801bad9864
RBP: 000000000003a578 R08: ffff8880b9437ccb R09: 1ffff11017286f99
R10: dffffc0000000000 R11: ffffffff8b8618c0 R12: ffff88801bb48800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eacdc20
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555dbb55c8 CR3: 000000000e132000 CR4: 0000000000350ef0
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x114/0x480 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:236 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:332
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47a/0x500 init/main.c:1103
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147