rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20693/1:b..l P4989/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=101989, q=1299 ncpus=2)
task:udevd state:R running task stack:22440 pid:4989 tgid:4989 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0xfd/0x2550 arch/x86/kernel/unwind_orc.c:498
Code: 1f c6 05 1b e4 c9 0e 01 48 c7 c7 40 b3 e9 8b be 4a 03 00 00 48 c7 c2 80 b3 e9 8b e8 2d 7b 2b 00 48 89 6c 24 38 48 89 5c 24 40 <49> 8d 5e 50 48 89 d8 48 c1 e8 03 48 89 44 24 28 42 80 3c 20 00 74
RSP: 0018:ffffc900026cf2e0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8488f73d RCX: 0000000080000001
RDX: 0000000065a9b2e6 RSI: ffffffff8c4bd360 RDI: ffffffff8c4bd320
RBP: 1ffff920004d9e78 R08: ffffffff8176f27f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: dffffc0000000000
R13: ffffffff8176f27f R14: ffffc900026cf388 R15: 1ffff920004d9e71
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:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
__slab_free+0x274/0x2c0 mm/slub.c:5767
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:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4612 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__do_kmalloc_node mm/slub.c:5361 [inline]
__kmalloc_noprof+0x311/0x720 mm/slub.c:5387
_kmalloc_noprof include/linux/slab.h:973 [inline]
_kzalloc_noprof include/linux/slab.h:1290 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x2ad/0x570 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x5fa/0x640 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
security_inode_getattr+0x12b/0x310 security/security.c:1895
vfs_getattr+0x23/0x70 fs/stat.c:259
vfs_statx_path+0x2b/0x230 fs/stat.c:299
vfs_statx+0x12e/0x200 fs/stat.c:356
vfs_fstatat+0x11b/0x170 fs/stat.c:373
__do_sys_newfstatat fs/stat.c:538 [inline]
__se_sys_newfstatat fs/stat.c:532 [inline]
__x64_sys_newfstatat+0x151/0x200 fs/stat.c:532
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa66bf11b0a
RSP: 002b:00007ffd36e83678 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055e248852410 RCX: 00007fa66bf11b0a
RDX: 00007ffd36e83680 RSI: 000055e2488402a8 RDI: 00000000ffffff9c
RBP: 000055e2838ec148 R08: 00063478c1c69200 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd36e83680 R14: 0000000000000000 R15: 00063478c1c69200
task:syz.3.3606 state:R running task stack:24584 pid:20693 tgid:20692 ppid:19072 task_flags:0x400140 flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline]
RIP: 0010:lock_release+0x93/0x3c0 kernel/locking/lockdep.c:5885
Code: 0f 85 0d 02 00 00 65 4c 8b 3d f1 ca c9 11 41 83 bf 9c 0b 00 00 00 0f 85 f7 01 00 00 49 81 3e 20 e5 2f 94 0f 84 ea 01 00 00 9c <5b> fa 48 c7 c7 6f 60 24 8e e8 df bd 2c 0a 65 ff 05 a8 0f ca 11 c7
RSP: 0018:ffffc9000d28f3f8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff823d3f49 RCX: 0000000080000001
RDX: 00000000cdac3f13 RSI: ffffffff8c4bd360 RDI: ffffffff8c4bd320
RBP: 0000000000000cc0 R08: ffffffff823d3f49 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000cc0
R13: ffffffff823d3f49 R14: ffffffff8eb59c60 R15: ffff888031961f00
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:337 [inline]
percpu_ref_put+0xf9/0x180 include/linux/percpu-refcount.h:351
css_put include/linux/cgroup_refcnt.h:79 [inline]
__mem_cgroup_charge+0x56/0x80 mm/memcontrol.c:5144
mem_cgroup_charge include/linux/memcontrol.h:641 [inline]
shmem_alloc_and_add_folio+0x7bb/0xf60 mm/shmem.c:1959
shmem_get_folio_gfp+0x5da/0x16d0 mm/shmem.c:2502
shmem_fault+0x179/0x390 mm/shmem.c:2703
__do_fault+0x138/0x2a0 mm/memory.c:5425
do_read_fault mm/memory.c:5860 [inline]
do_fault mm/memory.c:5994 [inline]
do_pte_missing+0x2215/0x34b0 mm/memory.c:4566
handle_pte_fault mm/memory.c:6379 [inline]
__handle_mm_fault mm/memory.c:6517 [inline]
handle_mm_fault+0x1b36/0x3080 mm/memory.c:6686
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0x1678/0x2720 mm/gup.c:1428
populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
__mm_populate+0x25f/0x390 mm/gup.c:1963
mm_populate include/linux/mm.h:4171 [inline]
vm_mmap_pgoff+0x353/0x4e0 mm/util.c:586
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb95919de59
RSP: 002b:00007fb95a109028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fb959425fa0 RCX: 00007fb95919de59
RDX: 0000000002000003 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fb959233e6f R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb959426038 R14: 00007fb959425fa0 R15: 00007ffe1b44cf08
rcu: rcu_preempt kthread starved for 10588 jiffies! g101989 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:27496 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20421 Comm: kworker/R-bond2 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: bond2 bond_alb_monitor
RIP: 0010:rcu_rdp_cpu_online kernel/rcu/tree.c:4036 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0xac/0x120 kernel/rcu/tree.c:4077
Code: 42 80 3c 30 00 74 05 e8 f2 6a 88 00 4c 8b 7b 28 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 d4 6a 88 00 <48> 8b 1b 48 83 c3 70 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48
RSP: 0018:ffffc90000a07d10 EFLAGS: 00000246
RAX: 1ffff110170e7834 RBX: ffff8880b873c1a0 RCX: 0000000080000301
RDX: 1ffff11004c7ac01 RSI: ffffffff8c4bd360 RDI: ffff8880b873c1a8
RBP: ffffc90000a080c0 R08: ffff888030095d00 R09: 0000000000000002
R10: 0000000000004888 R11: 0000000000000100 R12: 0000000000000000
R13: 1ffff11004c7ac00 R14: dffffc0000000000 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff88812505e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34d0aff8 CR3: 000000007f6b0000 CR4: 00000000003526f0
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
dev_nit_active_rcu net/core/dev.c:2540 [inline]
xmit_one net/core/dev.c:3887 [inline]
dev_hard_start_xmit+0x101/0x830 net/core/dev.c:3908
__dev_queue_xmit+0x1435/0x37f0 net/core/dev.c:4875
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip6_output+0x337/0x540 net/ipv6/ip6_output.c:246
synproxy_send_tcp_ipv6+0x549/0x700 net/netfilter/nf_synproxy_core.c:861
synproxy_send_client_synack_ipv6+0x83f/0xcd0 net/netfilter/nf_synproxy_core.c:907
nft_synproxy_eval_v6+0x362/0x4e0 net/netfilter/nft_synproxy.c:90
nft_synproxy_do_eval+0x3d1/0x550 net/netfilter/nft_synproxy.c:145
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:619
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:6209 [inline]
__netif_receive_skb net/core/dev.c:6322 [inline]
process_backlog+0x774/0x1860 net/core/dev.c:6673
__napi_poll+0xaa/0x330 net/core/dev.c:7732
napi_poll net/core/dev.c:7795 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7952
handle_softirqs+0x225/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:queue_delayed_work_on+0x17a/0x1e0 kernel/workqueue.c:2625
Code: 00 4d 85 f6 75 16 e8 d5 1e 39 00 eb 15 e8 ce 1e 39 00 e8 a9 a1 41 0a 4d 85 f6 74 ea e8 bf 1e 39 00 fb 65 48 8b 05 96 cc de 11 <48> 3b 44 24 20 75 56 89 d8 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000d9cf960 EFLAGS: 00000293
RAX: b871a5ec8bd4d400 RBX: ffff88805f0d1301 RCX: ffff888030095d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: ffffffff905775f7 R09: 1ffffffff20aeebe
R10: dffffc0000000000 R11: fffffbfff20aeebf R12: 0000000002000001
R13: 0000000000000000 R14: 0000000000000200 R15: 0000000000000000
queue_delayed_work include/linux/workqueue.h:714 [inline]
bond_alb_monitor+0x122e/0x17c0 drivers/net/bonding/bond_alb.c:1628
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
rescuer_thread+0x7b6/0x10b0 kernel/workqueue.c:3629
kthread+0x388/0x470 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