rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14715/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=76721, q=1378342 ncpus=2)
task:syz-executor state:R running task stack:23072 pid:14715 tgid:14715 ppid:5832 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012
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:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5850
Code: 3c 3b 00 74 08 4c 89 f7 e8 45 24 8e 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000bfaf240 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920017f5e5a RCX: ffffc9000bfaf203
RDX: 0000000000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c610860
RBP: ffffc9000bfaf380 R08: ffffffff901d09af R09: 1ffffffff203a135
R10: dffffc0000000000 R11: fffffbfff203a136 R12: 1ffff920017f5e54
R13: 0000000000000246 R14: ffffc9000bfaf2d0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0xa3/0xc0 mm/page_ext.c:550
__set_page_owner+0x3f0/0x800 mm/page_owner.c:328
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
get_free_pages_noprof+0xc/0x30 mm/page_alloc.c:4780
kasan_populate_vmalloc_pte+0x38/0xe0 mm/kasan/shadow.c:304
apply_to_pte_range mm/memory.c:2817 [inline]
apply_to_pmd_range mm/memory.c:2861 [inline]
apply_to_pud_range mm/memory.c:2897 [inline]
apply_to_p4d_range mm/memory.c:2933 [inline]
__apply_to_page_range+0x806/0xde0 mm/memory.c:2967
alloc_vmap_area+0x1d52/0x2400 mm/vmalloc.c:2035
__get_vm_area_node+0x1a9/0x270 mm/vmalloc.c:3116
__vmalloc_node_range_noprof+0x3a6/0x13f0 mm/vmalloc.c:3788
vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3982
kcov_ioctl+0x56/0x640 kernel/kcov.c:716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
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: 0033:0x7fa7c8b7e31b
RSP: 002b:00007ffe5e579980 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fa7c8b7e31b
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000df
RBP: 00007fa7c8d36600 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 9784 jiffies! g76721 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:25856 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
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:
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc5-syzkaller-00299-g11066801dd4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:ip_neigh_for_gw include/net/route.h:392 [inline]
RIP: 0010:ip_finish_output2+0xff0/0x1390 net/ipv4/ip_output.c:230
Code: 04 25 28 00 00 00 48 3b 84 24 e0 00 00 00 0f 85 55 03 00 00 44 89 f8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc <83> fb 0a 75 47 e8 d6 d2 70 f7 49 81 c4 a4 00 00 00 4c 89 ff 4c 89
RSP: 0018:ffffc900001e6ca0 EFLAGS: 00000293
RAX: 0000000000000100 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: ffffffff8fd99340 RDI: 0000000000000000
RBP: ffffc900001e6de0 R08: 0000000000000001 R09: ffffffff8a23fd09
R10: 0000000000000002 R11: ffff88801d2f0000 R12: ffff888219c80d00
R13: 0000000000000010 R14: ffffffff8a23fbaf R15: ffff888079de2000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f51cc02ccc3 CR3: 000000004bc82000 CR4: 00000000003526f0
Call Trace:
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:5670 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5783
process_backlog+0x662/0x15b0 net/core/dev.c:6115
__napi_poll+0xcb/0x490 net/core/dev.c:6779
napi_poll net/core/dev.c:6848 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6970
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