rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5838/1:b..l P6796/1:b..l P5520/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=11541, q=2046 ncpus=2)
task:dhcpcd state:R running task stack:20608 pid:5520 tgid:5520 ppid:5519 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6935
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6959
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x18f8/0x22d0 arch/x86/kernel/unwind_orc.c:672
__unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0xdf9/0x1140 mm/page_alloc.c:2657
discard_slab mm/slub.c:2673 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3142
put_cpu_partial+0x17c/0x250 mm/slub.c:3217
__slab_free+0x2ea/0x3d0 mm/slub.c:4468
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160
vma_lock_alloc kernel/fork.c:446 [inline]
vm_area_dup+0x61/0x290 kernel/fork.c:499
dup_mmap kernel/fork.c:697 [inline]
dup_mm kernel/fork.c:1695 [inline]
copy_mm+0xc1d/0x1f90 kernel/fork.c:1744
copy_process+0x1845/0x3d50 kernel/fork.c:2395
kernel_clone+0x226/0x8f0 kernel/fork.c:2807
__do_sys_clone kernel/fork.c:2950 [inline]
__se_sys_clone kernel/fork.c:2934 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2934
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: 0033:0x7f5433c39a12
RSP: 002b:00007ffee7c9c178 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 000056467d941601 RCX: 00007f5433c39a12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffee7cbc6e8 R08: 0000000000000000 R09: 000056467d941620
R10: 00007f5433b89a10 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000056467d941654
task:modprobe state:R running task stack:22784 pid:6796 tgid:6796 ppid:6337 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
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:kasan_check_range+0x1bf/0x290 mm/kasan/generic.c:189
Code: 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b 41 5c 41 5e 41 5f 5d cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00 00 75 5c f7 c5 00 00
RSP: 0018:ffffc9001bab7478 EFLAGS: 00000256
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81714280
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901e34b0
RBP: ffffc9001bab75b0 R08: ffffffff901e34b7 R09: 1ffffffff203c696
R10: dffffc0000000000 R11: fffffbfff203c697 R12: 1ffff92003756e9c
R13: ffffffff820d5c67 R14: ffffea000112c480 R15: dffffc0000000000
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
cpumask_test_cpu include/linux/cpumask.h:570 [inline]
cpu_online include/linux/cpumask.h:1117 [inline]
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xb0/0xa30 kernel/locking/lockdep.c:5860
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0xa3/0xc0 mm/page_ext.c:550
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1128 [inline]
free_unref_page+0xe0e/0x1140 mm/page_alloc.c:2657
discard_slab mm/slub.c:2673 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3142
put_cpu_partial+0x17c/0x250 mm/slub.c:3217
__slab_free+0x2ea/0x3d0 mm/slub.c:4468
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160
vma_lock_alloc kernel/fork.c:446 [inline]
vm_area_dup+0x61/0x290 kernel/fork.c:499
__split_vma+0x1cb/0xc50 mm/vma.c:434
split_vma mm/vma.c:510 [inline]
vma_modify+0x244/0x330 mm/vma.c:1528
vma_modify_flags+0x3a5/0x430 mm/vma.c:1546
mprotect_fixup+0x45a/0xaa0 mm/mprotect.c:666
do_mprotect_pkey+0x8d7/0xd70 mm/mprotect.c:840
__do_sys_mprotect mm/mprotect.c:861 [inline]
__se_sys_mprotect mm/mprotect.c:858 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:858
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: 0033:0x7faeab58abb7
RSP: 002b:00007fff88b3de88 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007faeab568570 RCX: 00007faeab58abb7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007faeab2ba000
RBP: 00007fff88b3dfa0 R08: 00007fff88b3de18 R09: 00007faeab5675c0
R10: 00007faeab267928 R11: 0000000000000206 R12: 00007faeab568570
R13: 00007faeab592eda R14: 00007faeab2bafb0 R15: 00007faeab2bae58
task:syz-executor state:R running task stack:20056 pid:5838 tgid:5838 ppid:5836 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
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:5853
Code: 2b 00 74 08 4c 89 f7 e8 3a af 8f 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:ffffc90003d47840 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007a8f14 RCX: ffff88802d8564d8
RDX: dffffc0000000000 RSI: ffffffff8c0aeb60 RDI: ffffffff8c6158a0
RBP: ffffc90003d47990 R08: ffffffff94323887 R09: 1ffffffff2864710
R10: dffffc0000000000 R11: fffffbfff2864711 R12: 1ffff920007a8f10
R13: dffffc0000000000 R14: ffffc90003d478a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
page_ext_get+0x3d/0x2a0 mm/page_ext.c:525
__reset_page_owner+0x30/0x430 mm/page_owner.c:290
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0xdf9/0x1140 mm/page_alloc.c:2657
__slab_free+0x31b/0x3d0 mm/slub.c:4509
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160
alloc_empty_file+0x9e/0x1d0 fs/file_table.c:228
alloc_file fs/file_table.c:345 [inline]
alloc_file_pseudo+0x1da/0x290 fs/file_table.c:376
create_pipe_files+0x33e/0x700 fs/pipe.c:938
__do_pipe_flags+0x48/0x2d0 fs/pipe.c:973
do_pipe2+0xd4/0x310 fs/pipe.c:1024
__do_sys_pipe2 fs/pipe.c:1042 [inline]
__se_sys_pipe2 fs/pipe.c:1040 [inline]
__x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1040
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: 0033:0x7f419437ec39
RSP: 002b:00007ffec10f3be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 000055556e361b10 RCX: 00007f419437ec39
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 00007ffec10f3c00
RBP: 00007ffec10f41b0 R08: 0000000000000007 R09: 000055556e3616a0
R10: c83c721c7b57c73a R11: 0000000000000246 R12: 00007ffec10f3df0
R13: 000055556e3663a0 R14: 000055556e363fd0 R15: 585858582e7a7973
rcu: rcu_preempt kthread starved for 10572 jiffies! g11541 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:25976 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
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 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-syzkaller-10696-g28866d6e84b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp2+0x2d/0x90 kernel/kcov.c:307
Code: fa 4c 8b 04 24 65 48 8b 14 25 c0 d4 03 00 65 8b 05 90 ec 6d 7e 25 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83 ba 1c 16 00 00 00 <74> 52 8b 82 f8 15 00 00 83 f8 03 75 47 48 8b 8a 00 16 00 00 44 8b
RSP: 0018:ffffc900001e6938 EFLAGS: 00000246
RAX: 0000000000000100 RBX: 000000000000dd86 RCX: dffffc0000000000
RDX: ffff88801d2e8000 RSI: 000000000000dd86 RDI: 0000000000000608
RBP: ffffc900001e6a70 R08: ffffffff8aa4a1ff R09: 1ffffffff203c696
R10: dffffc0000000000 R11: ffffffff8aa4a070 R12: ffff88816f25c1bf
R13: 1ffff1102de4b83b R14: ffff88816f25c1f4 R15: ffff88816f25c1dc
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c385385 CR3: 0000000060dba000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
br_nf_forward_finish+0x18f/0xfb0 net/bridge/br_netfilter_hooks.c:670
NF_HOOK+0x700/0x7c0 include/linux/netfilter.h:314
br_nf_forward_ip+0x61e/0x7b0 net/bridge/br_netfilter_hooks.c:747
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x2a7/0x460 include/linux/netfilter.h:312
__br_forward+0x489/0x660 net/bridge/br_forward.c:115
br_handle_frame_finish+0x18ba/0x1fe0 net/bridge/br_input.c:215
br_nf_hook_thresh+0x472/0x590
br_nf_pre_routing_finish_ipv6+0xaa0/0xdd0
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x379/0x770 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424
__netif_receive_skb_core+0x14eb/0x4690 net/core/dev.c:5566
__netif_receive_skb_one_core net/core/dev.c:5670 [inline]
__netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
process_backlog+0x662/0x15b0 net/core/dev.c:6117
__napi_poll+0xcb/0x490 net/core/dev.c:6877
napi_poll net/core/dev.c:6946 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:7068
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
run_ksoftirqd+0xca/0x130 kernel/softirq.c:943
smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
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