rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10468 ticks this GP) idle=57d4/1/0x4000000000000000 softirq=42219/42221 fqs=3508
rcu: hardirqs softirqs csw/system
rcu: number: 1568764 1 0
rcu: cputime: 13291 39177 36 ==> 52470(ms)
rcu: (t=10500 jiffies g=51821 q=1153 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 479 jiffies! g51821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=29397
rcu: rcu_preempt kthread starved for 485 jiffies! g51821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26064 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5755 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x10 arch/x86/kernel/paravirt.c:148
Code: 6f 21 02 c3 cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d 23 39 42 00 fb f4 66 0f 1f 00 55 41 57 41 56 41 54 53 50 8b 2f eb 2e 41 89 de 80
RSP: 0018:ffffc900043df6d8 EFLAGS: 000002d3
RAX: ffffffff813aa578 RBX: 0000000000000003 RCX: ffff88807a571e00
RDX: 0000000000000000 RSI: ffffffff8acac9e0 RDI: ffffffff8b1c89a0
RBP: ffffc900043df7b0 R08: ffffffff911c35c7 R09: 1ffffffff22386b8
R10: dffffc0000000000 R11: fffffbfff22386b9 R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff9200087bee0
FS: 00005555776e3500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44136ca037 CR3: 00000000308c3000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline]
kvm_wait+0x23d/0x2a0 arch/x86/kernel/kvm.c:1058
pv_wait arch/x86/include/asm/paravirt.h:598 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x61a/0x9d0 kernel/locking/qspinlock.c:511
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x23e/0x2c0 kernel/locking/spinlock_debug.c:115
spin_lock_bh include/linux/spinlock.h:356 [inline]
lock_sock_nested+0x6a/0x100 net/core/sock.c:3538
lock_sock include/net/sock.h:1780 [inline]
tcp_recvmsg+0x214/0x860 net/ipv4/tcp.c:2607
inet_recvmsg+0x140/0x1f0 net/ipv4/af_inet.c:882
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg net/socket.c:1068 [inline]
sock_read_iter+0x2d9/0x3e0 net/socket.c:1138
call_read_iter include/linux/fs.h:2012 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x46a/0x970 fs/read_write.c:470
ksys_read+0x150/0x260 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4415957917
Code: 48 89 fa 4c 89 df e8 a8 56 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffce1ef6e80 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005555776e3500 RCX: 00007f4415957917
RDX: 0000000000000004 RSI: 00007ffce1ef6edc RDI: 0000000000000003
RBP: 00007ffce1ef7380 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
R13: 00007ffce1ef6edc R14: 00007ffce1ef6f70 R15: 0000000000000000
CPU: 1 PID: 13712 Comm: syz.3.2435 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:packet_rcv+0x187/0x13d0 net/packet/af_packet.c:2188
Code: 41 2d f8 4d 89 e7 4c 89 ff e8 45 62 19 ff 31 c0 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d c3 4d 89 e7 4d 8d 74 24 10 4c 89 f0 <48> c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 80 3c 20 00 74 08 4c
RSP: 0018:ffffc900001ef610 EFLAGS: 00000246
RAX: ffff88802fd16290 RBX: ffff88802fd16300 RCX: dffffc0000000000
RDX: ffff88802bb1bc00 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 1ffff11005fa2c5e R08: ffffffff911c35c7 R09: 1ffffffff22386b8
R10: dffffc0000000000 R11: fffffbfff22386b9 R12: ffff88802fd16280
R13: 1ffff11005fa2c60 R14: ffff88802fd16290 R15: ffff88802fd16280
FS: 00007facc57e86c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005650e88a34b0 CR3: 0000000079c8f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000008d24
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
dev_queue_xmit_nit+0xb16/0xbb0 net/core/dev.c:2385
xmit_one net/core/dev.c:3628 [inline]
dev_hard_start_xmit+0x148/0x740 net/core/dev.c:3648
sch_direct_xmit+0x25e/0x4c0 net/sched/sch_generic.c:345
__dev_xmit_skb net/core/dev.c:3869 [inline]
__dev_queue_xmit+0x165d/0x3660 net/core/dev.c:4404
neigh_output include/net/neighbour.h:543 [inline]
ip_finish_output2+0xd3a/0x11e0 net/ipv4/ip_output.c:235
NF_HOOK_COND include/linux/netfilter.h:293 [inline]
ip_output+0x2a1/0x3b0 net/ipv4/ip_output.c:436
dst_output include/net/dst.h:467 [inline]
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x1049/0x1950 net/ipv4/ip_output.c:540
__tcp_transmit_skb+0x1d6b/0x33f0 net/ipv4/tcp_output.c:1425
tcp_ack_snd_check net/ipv4/tcp_input.c:5736 [inline]
tcp_rcv_established+0xb06/0x1d20 net/ipv4/tcp_input.c:6182
tcp_v4_do_rcv+0x4ed/0xb80 net/ipv4/tcp_ipv4.c:1735
tcp_v4_rcv+0x23bf/0x2af0 net/ipv4/tcp_ipv4.c:2167
ip_protocol_deliver_rcu+0x20e/0x3f0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2ca/0x510 net/ipv4/ip_input.c:233
NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:304
dst_input include/net/dst.h:477 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
ip_sublist_rcv+0xa4c/0xd70 net/ipv4/ip_input.c:639
ip_list_rcv+0x3f2/0x440 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5677 [inline]
__netif_receive_skb_list_core+0x583/0x750 net/core/dev.c:5725
__netif_receive_skb_list net/core/dev.c:5777 [inline]
netif_receive_skb_list_internal+0x943/0xca0 net/core/dev.c:5868
gro_normal_list include/net/gro.h:451 [inline]
napi_complete_done+0x329/0x820 net/core/dev.c:6208
virtqueue_napi_complete drivers/net/virtio_net.c:450 [inline]
virtnet_poll+0xa9c/0x1280 drivers/net/virtio_net.c:2236
__napi_poll+0xc0/0x460 net/core/dev.c:6638
napi_poll net/core/dev.c:6705 [inline]
net_rx_action+0x616/0xc40 net/core/dev.c:6841
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255
Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 90 43 32 09 e8 eb 27 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900033a6538 EFLAGS: 00000282
RAX: e9be8827f2009500 RBX: 0000000000000000 RCX: e9be8827f2009500
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: ffffffff8b1c89a0
RBP: ffffc900033a6590 R08: ffffffff8e8b02af R09: 1ffffffff1d16055
R10: dffffc0000000000 R11: fffffbfff1d16056 R12: ffff88802bb1bc00
R13: dffffc0000000000 R14: ffff88801a273c00 R15: ffff8880b8f3cac8
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x155b/0x45a0 kernel/sched/core.c:6700
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
unwind_next_frame+0x200f/0x2970 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540
alloc_vmap_area+0x1b4/0x1e30 mm/vmalloc.c:1611
__get_vm_area_node+0x162/0x370 mm/vmalloc.c:2620
__vmalloc_node_range+0x36e/0x1330 mm/vmalloc.c:3299
__vmalloc_node mm/vmalloc.c:3404 [inline]
vmalloc+0x79/0x90 mm/vmalloc.c:3437
bpf_prog_calc_tag+0xe3/0x6c0 kernel/bpf/core.c:293
resolve_pseudo_ldimm64+0xe1/0x1160 kernel/bpf/verifier.c:17664
bpf_check+0x3770/0xeba0 kernel/bpf/verifier.c:20418
bpf_prog_load+0x1163/0x1670 kernel/bpf/syscall.c:2753
__sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477
__do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7facc499c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007facc57e8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007facc4c16090 RCX: 00007facc499c799
RDX: 0000000000000094 RSI: 00002000000001c0 RDI: 0000000000000005
RBP: 00007facc4a32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007facc4c16128 R14: 00007facc4c16090 R15: 00007ffea4f5a308