rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10472/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=30365, q=1375245 ncpus=2)
task:syz.2.1518 state:R running task stack:23808 pid:10472 tgid:10472 ppid:7819 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6997
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:task_on_another_cpu arch/x86/include/asm/unwind.h:148 [inline]
RIP: 0010:__unwind_start+0x73/0x740 arch/x86/kernel/unwind_orc.c:699
Code: 74 12 4c 89 ef e8 9d 19 bd 00 48 ba 00 00 00 00 00 fc ff df 49 89 5d 00 80 3d b1 90 f0 0c 01 75 2f 65 48 8b 04 25 c0 d7 03 00 <48> 39 d8 74 68 48 8d 6b 34 48 89 e8 48 c1 e8 03 0f b6 04 10 84 c0
RSP: 0018:ffffc90016c96f00 EFLAGS: 00000246
RAX: ffff88802e4f9e00 RBX: ffff88802e4f9e00 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffc90016c96fc0
RBP: dffffc0000000000 R08: ffffc90016c96fbf R09: 0000000000000000
R10: ffffc90016c96f60 R11: fffff52002d92df8 R12: 0000000000000000
R13: ffffc90016c96f88 R14: ffffc90016c96f60 R15: 1ffff92002d92df1
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:1108 [inline]
free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
discard_slab mm/slub.c:2678 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3146
put_cpu_partial+0x17c/0x250 mm/slub.c:3221
__slab_free+0x2ea/0x3d0 mm/slub.c:4450
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:247 [inline]
slab_post_alloc_hook mm/slub.c:4086 [inline]
slab_alloc_node mm/slub.c:4135 [inline]
kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142
ptlock_alloc+0x20/0x70 mm/memory.c:6902
ptlock_init include/linux/mm.h:2958 [inline]
pagetable_pte_ctor include/linux/mm.h:2985 [inline]
__pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
pte_alloc_one+0xcd/0x5d0 arch/x86/mm/pgtable.c:33
__pte_alloc+0x79/0x390 mm/memory.c:448
__get_locked_pte mm/memory.c:1992 [inline]
get_locked_pte include/linux/mm.h:2727 [inline]
insert_page mm/memory.c:2076 [inline]
vm_insert_page+0x5fa/0x710 mm/memory.c:2229
kcov_mmap+0xd7/0x140 kernel/kcov.c:506
call_mmap include/linux/fs.h:2172 [inline]
mmap_region+0x1add/0x2990 mm/mmap.c:1440
do_mmap+0x8f0/0x1000 mm/mmap.c:496
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:542
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: 0033:0x7f9f2af7e033
RSP: 002b:00007ffc401154a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f9f2b1362a0 RCX: 00007f9f2af7e033
RDX: 0000000000000003 RSI: 0000000000200000 RDI: 00007f9f28601000
RBP: 00007f9f2b136208 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f9f2b136208 R14: 0000000000000001 R15: 00000000000000b6
rcu: rcu_preempt kthread starved for 10549 jiffies! g30365 f0x2 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:25888 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.11.0-syzkaller-11517-gc4a14f6d9d17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:87 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
RIP: 0010:kasan_quarantine_put+0x26/0x230 mm/kasan/quarantine.c:207
Code: 90 90 90 90 66 0f 1f 00 41 57 41 56 41 55 41 54 53 50 49 89 fe e8 da e9 ff ff 48 85 c0 74 6b 48 89 c3 48 c7 04 24 00 00 00 00 <9c> 8f 04 24 4c 8b 3c 24 fa 41 f7 c7 00 02 00 00 74 05 e8 73 07 9e
RSP: 0018:ffffc900001e6720 EFLAGS: 00000282
RAX: ffff8881eefc4140 RBX: ffff8881eefc4140 RCX: 0000000000000000
RDX: ffff8881eefc4140 RSI: ffff8881eefc4140 RDI: ffff8881412ea640
RBP: 0000000000000000 R08: ffffc900001e64f0 R09: 000000000000001b
R10: ffffc900001e63b0 R11: ffffffff81806870 R12: ffff8881412ea65c
R13: ffffea0007bbf100 R14: ffff8881412ea640 R15: ffff8881412ea640
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e68000 CR3: 0000000056ce0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2343 [inline]
slab_free mm/slub.c:4580 [inline]
kmem_cache_free+0x1a2/0x420 mm/slub.c:4682
packet_rcv+0x16f/0x14b0 net/packet/af_packet.c:2290
dev_queue_xmit_nit+0xad4/0xc10 net/core/dev.c:2347
xmit_one net/core/dev.c:3584 [inline]
dev_hard_start_xmit+0x15f/0x7e0 net/core/dev.c:3604
__dev_queue_xmit+0x1b11/0x3ed0 net/core/dev.c:4428
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236
synproxy_send_client_synack+0x8b8/0xf30 net/netfilter/nf_synproxy_core.c:484
nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288
nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161
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+0x29e/0x450 include/linux/netfilter.h:312
NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5666 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5779
process_backlog+0x662/0x15b0 net/core/dev.c:6111
__napi_poll+0xcb/0x490 net/core/dev.c:6775
napi_poll net/core/dev.c:6844 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6966
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
run_ksoftirqd+0xca/0x130 kernel/softirq.c:927
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