GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P17062/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=73369, q=1233 ncpus=2)
task:syz.6.3014      state:R  running task     stack:26512 pid:17062 tgid:17060 ppid:14380  task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5366 [inline]
 __schedule+0x1b18/0x50e0 kernel/sched/core.c:6747
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6926
 preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6950
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __local_bh_enable_ip+0x179/0x200 kernel/softirq.c:396
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 nl80211_netlink_notify+0x6e6/0x840 net/wireless/nl80211.c:20282
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:380
 netlink_release+0x11d9/0x1b80 net/netlink/af_netlink.c:764
 __sock_release net/socket.c:647 [inline]
 sock_close+0xbc/0x240 net/socket.c:1391
 __fput+0x3e9/0x9f0 fs/file_table.c:465
 fput_close_sync+0x1ef/0x270 fs/file_table.c:570
 __do_sys_close fs/open.c:1581 [inline]
 __se_sys_close fs/open.c:1566 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1566
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd579d8bdca
RSP: 002b:00007fd57ab6bf90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007fd579d8bdca
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd579fa5fa0 R15: 00007ffeeb0e01f8
 </TASK>
rcu: rcu_preempt kthread starved for 9964 jiffies! g73369 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:26736 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5366 [inline]
 __schedule+0x1b18/0x50e0 kernel/sched/core.c:6747
 __schedule_loop kernel/sched/core.c:6824 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6839
 schedule_timeout+0x15b/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6 Comm: kworker/R-kvfre Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue:  0x0 (kvfree_rcu_reclaim)
RIP: 0010:memset_orig+0x36/0xb0 arch/x86/lib/memset_64.S:69
Code: 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 74 48 89 d1 48 c1 e9 06 74 39 66 0f 1f 84 00 00 00 00 00 48 ff c9 48 89 07 <48> 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89
RSP: 0018:ffffc90000a07dd8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff888196cd28c8 RCX: 0000000000000001
RDX: 0000000000000200 RSI: 0000000000000000 RDI: ffffc90000a07f60
RBP: ffffc90000a08010 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffc90000a07de0 R11: fffffbfff20bc88f R12: ffffea00065b3480
R13: ffff888196cd28c0 R14: 0000000000000000 R15: ffffc90000a07de0
FS:  0000000000000000(0000) GS:ffff8881250ea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 000000003f320000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kasan_save_stack mm/kasan/common.c:44 [inline]
 kasan_save_track+0x30/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2376 [inline]
 slab_free mm/slub.c:4633 [inline]
 kmem_cache_free+0x197/0x410 mm/slub.c:4735
 nft_synproxy_eval_v4+0x3d4/0x610 net/netfilter/nft_synproxy.c:60
 nft_synproxy_do_eval+0x36a/0xa90 net/netfilter/nft_synproxy.c:141
 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
 nft_do_chain+0x4b2/0x1db0 net/netfilter/nf_tables_core.c:285
 nft_do_chain_inet+0x41f/0x6b0 net/netfilter/nft_chain_filter.c:161
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x29b/0x450 include/linux/netfilter.h:312
 NF_HOOK+0x3a0/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5891 [inline]
 __netif_receive_skb+0x2c9/0x670 net/core/dev.c:6004
 process_backlog+0x664/0x15c0 net/core/dev.c:6356
 __napi_poll+0xcb/0x480 net/core/dev.c:7328
 napi_poll net/core/dev.c:7392 [inline]
 net_rx_action+0x89d/0x1240 net/core/dev.c:7514
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mutex_lock_nested+0x4/0x20 kernel/locking/mutex.c:783
Code: 90 e8 00 11 06 f6 eb 93 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <89> f2 4c 8b 04 24 be 02 00 00 00 31 c9 eb 1d 66 66 66 66 2e 0f 1f
RSP: 0018:ffffc900000b7c98 EFLAGS: 00000246
RAX: ffffffff818c62bb RBX: dffffc0000000000 RCX: ffff88801c681e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ebe4220
RBP: ffffc900000b7e30 R08: ffffffff818c62ad R09: 1ffffffff20bc88e
R10: dffffc0000000000 R11: fffffbfff20bc88f R12: ffff88801c681e18
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1102815fe2b
 worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 rescuer_thread+0xa23/0xf90 kernel/workqueue.c:3529
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog