rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10605/1:b..l
(detected by 1, t=10503 jiffies, g=44237, q=1509)
task:syz.1.2443 state:R running task stack:25072 pid:10605 ppid: 4187 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__local_bh_enable_ip+0x147/0x1c0 kernel/softirq.c:408
rcu_read_unlock_bh include/linux/rcupdate.h:810 [inline]
__dev_queue_xmit+0x1b64/0x2e50 net/core/dev.c:4341
__bpf_tx_skb net/core/filter.c:2136 [inline]
__bpf_redirect_no_mac net/core/filter.c:2170 [inline]
__bpf_redirect+0x693/0xe90 net/core/filter.c:2193
____bpf_clone_redirect net/core/filter.c:2471 [inline]
bpf_clone_redirect+0x2e1/0x460 net/core/filter.c:2434
bpf_prog_208b094576c80b22+0x56/0x898
bpf_dispatcher_nop_func include/linux/bpf.h:889 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_test_run+0x2a8/0x800 net/bpf/test_run.c:119
bpf_prog_test_run_skb+0x9fb/0x1190 net/bpf/test_run.c:678
bpf_prog_test_run+0x31c/0x390 kernel/bpf/syscall.c:3374
__sys_bpf+0x5a5/0x6f0 kernel/bpf/syscall.c:4675
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4e298b5159
RSP: 002b:00007f4e27b0d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f4e29b3cfa0 RCX: 00007f4e298b5159
RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f4e2994c03b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4e29b3d038 R14: 00007f4e29b3cfa0 R15: 00007ffcb300d4a8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10496 jiffies! g44237 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=24479
rcu: rcu_preempt kthread starved for 10497 jiffies! g44237 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:27216 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
rcu_gp_fqs_loop+0x2be/0x11f0 kernel/rcu/tree.c:1972
rcu_gp_kthread+0x9a/0x370 kernel/rcu/tree.c:2145
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
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: 10608 Comm: syz.0.2446 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:perf_tp_event+0xd/0xbe0 kernel/events/core.c:10039
Code: 02 e9 7b ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c ac 48 89 df e8 33 c2 25 00 eb a2 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 <48> 83 e4 c0 48 81 ec 40 02 00 00 4d 89 cc 4c 89 44 24 18 89 4c 24
RSP: 0018:ffffc900000075a0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000014
RDX: ffffe8ffffcbd000 RSI: 0000000000000001 RDI: 0000000000000116
RBP: ffffc900000075c8 R08: ffff8880b90351c8 R09: ffffe8ffffc46db0
R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffe8ffffcbd000
R13: ffffffff8c369e60 R14: ffff8880b90351c8 R15: dffffc0000000000
FS: 00007f46c4a436c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f46c689e81b CR3: 000000002b9fc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10031
perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 f2 0f 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007800 EFLAGS: 00000206
RAX: d882abdc29f45100 RBX: 1ffff92000000f04 RCX: d882abdc29f45100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4540
RBP: ffffc900000078e0 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:772 [inline]
netif_receive_skb_list_internal+0x961/0xbd0 net/core/dev.c:5786
gro_normal_list net/core/dev.c:5939 [inline]
napi_complete_done+0x37e/0x850 net/core/dev.c:6677
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x9b7/0xfb0 drivers/net/virtio_net.c:1627
__napi_poll+0xbb/0x430 net/core/dev.c:7101
napi_poll net/core/dev.c:7168 [inline]
net_rx_action+0x522/0xa80 net/core/dev.c:7258
handle_softirqs+0x336/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6799
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 c5 96 89 f7 e8 90 7b b6 f7 fb bf 01 00 00 00 d5 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000324fda0 EFLAGS: 00000286
RAX: d882abdc29f45100 RBX: 0000000000000000 RCX: d882abdc29f45100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc9000324fe50 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000649fb4
irqentry_exit+0x63/0x70 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:syscall_exit_to_user_mode+0x1/0x40 kernel/entry/common.c:305
Code: 35 9c f7 eb 0e e8 bf dd ff ff 48 8b 3c 24 e9 46 f4 ff ff bf 01 00 00 00 e8 9c 02 00 00 eb e6 66 2e 0f 1f 84 00 00 00 00 00 53 <48> 89 fb e8 67 b2 a6 f7 e8 e2 b2 a6 f7 48 89 df e8 ea ad a6 f7 e8
RSP: 0018:ffffc9000324ff10 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc9000324ff20 RCX: d882abdc29f45100
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc9000324ff58
RBP: ffffc9000324ff48 R08: ffff888022e8d96b R09: 1ffff110045d1b2d
R10: dffffc0000000000 R11: ffffed10045d1b2e R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000324ff58 R15: 00000000000000ca
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f46c67eb159
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:00007f46c4a430e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f46c6a72fa8 RCX: 00007f46c67eb159
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f46c6a72fac
RBP: 00007f46c6a72fa0 R08: 000968de4e540a9e R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f46c6a73038 R14: 00007ffc38cc25c0 R15: 00007ffc38cc26a8