rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6730/1:b..l.. P5616/1:b..l.. P4966/1:b..l.. P8292/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=146829, q=859 ncpus=1)
task:syz-executor state:R running task stack:22152 pid:8292 tgid:8292 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2058 [inline]
zap_pmd_range mm/memory.c:2113 [inline]
zap_pud_range mm/memory.c:2141 [inline]
zap_p4d_range mm/memory.c:2162 [inline]
__zap_vma_range+0x3d29/0x4b50 mm/memory.c:2202
unmap_vmas+0x38b/0x550 mm/memory.c:2271
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1192
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x1216/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe86919cb67
RSP: 002b:00007ffd7414dce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000005
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fe86919cb67
RDX: 0000000000000000 RSI: 00007ffd7414dcf0 RDI: 0000000000000003
RBP: 00007ffd7414ddec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000171
R13: 0000000000000000 R14: 000000000006fde4 R15: 00007ffd7414de40
task:klogd state:R running task stack:24008 pid:4966 tgid:4966 ppid:1 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
_raw_spin_unlock_irqrestore+0x76/0x80 kernel/locking/spinlock.c:221
spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
__wake_up_common_lock+0x195/0x1f0 kernel/sched/wait.c:127
sock_def_readable+0x1eb/0x550 net/core/sock.c:3739
unix_dgram_sendmsg+0xd55/0x17e0 net/unix/af_unix.c:2304
sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800
__sock_sendmsg net/socket.c:818 [inline]
__sys_sendto+0x408/0x5a0 net/socket.c:2283
__do_sys_sendto net/socket.c:2290 [inline]
__se_sys_sendto net/socket.c:2286 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2286
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09cc4f4407
RSP: 002b:00007ffcc3e9a940 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f09cc3a4c80 RCX: 00007f09cc4f4407
RDX: 000000000000005c RSI: 00007ffcc3e9aa80 RDI: 0000000000000003
RBP: 00007ffcc3e9aeb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffcc3e9aec8
R13: 00007ffcc3e9aa80 R14: 0000000000000041 R15: 00007ffcc3e9aa80
task:kworker/0:4 state:R running task stack:22120 pid:5616 tgid:5616 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:seqcount_lockdep_reader_access+0xed/0x100 include/linux/seqlock.h:76
Code: 00 75 11 e8 85 d3 a7 f7 4d 85 f6 75 16 e8 7b d3 a7 f7 eb 15 e8 74 d3 a7 f7 e8 cf f1 e7 01 4d 85 f6 74 ea e8 65 d3 a7 f7 fb 5b <41> 5e c3 cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90
RSP: 0018:ffffc900042b7970 EFLAGS: 00000293
RAX: ffffffff8a21343b RBX: 0000000000000001 RCX: ffff888079f43e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900042b7ad0 R08: ffffffff91bd56bf R09: 1ffffffff237aad7
R10: dffffc0000000000 R11: fffffbfff237aad8 R12: dffffc0000000000
R13: ffffffff81905d7a R14: 0000000000000200 R15: 00000000000061bd
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:348 [inline]
gc_worker+0x31b/0x1890 net/netfilter/nf_conntrack_core.c:1532
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor state:R running task stack:22408 pid:6730 tgid:6730 ppid:6720 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:debug_lockdep_rcu_enabled+0xd/0x40 kernel/rcu/update.c:320
Code: 8e 67 48 0f b9 3a 90 eb bc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 83 3d 0b 2c b4 05 00 <74> 1d 83 3d ea 59 b4 05 00 74 14 65 48 8b 0d 08 64 d9 08 31 c0 83
RSP: 0018:ffffc90004d36c78 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90004d36d38 RCX: ffffc90004d37230
RDX: ffffc90004d36d01 RSI: dffffc0000000000 RDI: ffffc90004d36d30
RBP: 1ffffffff24c8e01 R08: ffffc90004d37218 R09: 0000000000000000
R10: ffffc90004d36d78 R11: fffff520009a6db1 R12: ffffc90004d30000
R13: ffffffff817889cf R14: ffffc90004d36d28 R15: ffffc90004d37228
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1b5d/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1401 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2952
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047
ptlock_alloc+0x20/0x70 mm/memory.c:7790
ptlock_init include/linux/mm.h:4022 [inline]
pagetable_pte_ctor include/linux/mm.h:4091 [inline]
__pte_alloc_one_noprof include/asm-generic/pgalloc.h:79 [inline]
pte_alloc_one+0x7a/0x3d0 arch/x86/mm/pgtable.c:18
__pte_alloc+0x25/0x1a0 mm/memory.c:453
copy_pte_range mm/memory.c:1298 [inline]
copy_pmd_range+0x5395/0x5c00 mm/memory.c:1453
copy_pud_range mm/memory.c:1490 [inline]
copy_p4d_range mm/memory.c:1514 [inline]
copy_page_range+0xcc2/0x12b0 mm/memory.c:1600
dup_mmap+0xf70/0x1e10 mm/mmap.c:1819
dup_mm kernel/fork.c:1542 [inline]
copy_mm+0x115/0x470 kernel/fork.c:1594
copy_process+0x1ecc/0x44b0 kernel/fork.c:2320
kernel_clone+0x2d7/0x940 kernel/fork.c:2784
__do_sys_clone kernel/fork.c:2926 [inline]
__se_sys_clone kernel/fork.c:2910 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2910
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f76ac1c6fd2
RSP: 002b:00007ffcbbb782f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcbbb782f0 RCX: 00007f76ac1c6fd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcbbb7847c R08: 0000000000000000 R09: 0000000000000001
R10: 000055557f2537d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 000000000006fe86 R15: 00007ffcbbb784d0
rcu: rcu_preempt kthread starved for 204 jiffies! g146829 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27496 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 3225 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221
Code: f7 e8 bd d1 98 f5 f7 c3 00 02 00 00 74 05 e8 a0 6b c5 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 d4 c9 89 f5 65 48 8b 05 2c a2 d6 08 48 85 c0 74 18 5b 41 5e c3
RSP: 0018:ffffc900000072b8 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000282 RCX: 8000000000000102
RDX: 0000000000000002 RSI: ffffffff8e7b0557 RDI: 0000000000000001
RBP: ffffea000161e510 R08: ffffffff91bd56bf R09: 1ffffffff237aad7
R10: dffffc0000000000 R11: fffffbfff237aad8 R12: 0000000000000000
R13: ffff8881bf9a0000 R14: ffffffff9c1c5a08 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881233f7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558c4334e8 CR3: 000000000ff48000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000a986b2fd DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1180 [inline]
debug_check_no_obj_freed+0x39e/0x450 lib/debugobjects.c:1201
slab_free_hook mm/slub.c:2711 [inline]
slab_free mm/slub.c:6630 [inline]
kmem_cache_free+0xfd/0x650 mm/slub.c:6757
nft_synproxy_eval_v6+0x36a/0x4e0 net/netfilter/nft_synproxy.c:-1
nft_synproxy_do_eval+0x3ff/0x5d0 net/netfilter/nft_synproxy.c:146
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x48d/0x1b10 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:545
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6405 [inline]
__netif_receive_skb net/core/dev.c:6518 [inline]
process_backlog+0x795/0x18b0 net/core/dev.c:6869
__napi_poll+0xaa/0x330 net/core/dev.c:7938
napi_poll net/core/dev.c:8001 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8158
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_local_purge+0x277/0x300 net/batman-adv/translation-table.c:1798
batadv_tt_purge+0x35/0xa40 net/batman-adv/translation-table.c:4269
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
rescuer_thread+0x84a/0x12a0 kernel/workqueue.c:3803
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245