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): P5246/1:b..l P6062/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=9633, q=1164891 ncpus=2)
task:syz.3.185 state:R running task stack:23152 pid:6062 tgid:6061 ppid:5230 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6854
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6878
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
wp_page_copy mm/memory.c:3454 [inline]
do_wp_page+0x1d9f/0x52d0 mm/memory.c:3745
handle_pte_fault+0x10e3/0x6800 mm/memory.c:5767
__handle_mm_fault mm/memory.c:5894 [inline]
handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6062
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc9001693f738 EFLAGS: 00050206
RAX: ffffffff84b94e01 RBX: 00000000203a6d20 RCX: 000000000000bef0
RDX: 0000000000000000 RSI: ffff88805bc843c8 RDI: 00000000203ab000
RBP: ffffc9001693f8b8 R08: ffff88805bc902b7 R09: 1ffff1100b792056
R10: dffffc0000000000 R11: ffffed100b792057 R12: 00000000000101d0
R13: ffff88805bc800e8 R14: ffffc9001693fe18 R15: 1ffff92002d27fc3
copy_user_generic arch/x86/include/asm/uaccess_64.h:121 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:142 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x257/0x1d60 lib/iov_iter.c:185
copy_to_iter include/linux/uio.h:211 [inline]
simple_copy_to_iter net/core/datagram.c:524 [inline]
__skb_datagram_iter+0x107/0x900 net/core/datagram.c:401
skb_copy_datagram_iter+0xd1/0x250 net/core/datagram.c:538
skb_copy_datagram_msg include/linux/skbuff.h:4076 [inline]
tipc_recvstream+0x7a8/0xf80 net/tipc/socket.c:2067
sock_recvmsg_nosec net/socket.c:1051 [inline]
sock_recvmsg+0x22f/0x280 net/socket.c:1073
____sys_recvmsg+0x1c6/0x480 net/socket.c:2826
___sys_recvmsg net/socket.c:2868 [inline]
__sys_recvmsg+0x2e6/0x3d0 net/socket.c:2898
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: 0033:0x7f154457dff9
RSP: 002b:00007f154536b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f1544735f80 RCX: 00007f154457dff9
RDX: 0000000000001f00 RSI: 0000000020000500 RDI: 0000000000000008
RBP: 00007f15445f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1544735f80 R15: 00007fff056f94c8
task:udevd state:R running task stack:21664 pid:5246 tgid:5246 ppid:4686 flags:0x00000002
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:debug_lockdep_rcu_enabled+0x2a/0x40 kernel/rcu/update.c:321
Code: f3 0f 1e fa 31 c0 83 3d df 8e 57 04 00 74 1e 83 3d 36 c0 57 04 00 74 15 65 48 8b 0c 25 c0 d7 03 00 31 c0 83 b9 dc 0a 00 00 00 <0f> 94 c0 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00
RSP: 0018:ffffc90003d779c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f510711a37f RCX: ffff88806197bc00
RDX: dffffc0000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c60f860
RBP: 0000000000000001 R08: ffffffff942c5807 R09: 1ffffffff2858b00
R10: dffffc0000000000 R11: fffffbfff2858b01 R12: ffff88806197bc00
R13: ffffffff81808f50 R14: 0000000000000001 R15: 00007f510711a37f
rcu_read_lock include/linux/rcupdate.h:850 [inline]
is_bpf_text_address+0x4f/0x2a0 kernel/bpf/core.c:767
kernel_text_address+0xa7/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4296
kmalloc_noprof include/linux/slab.h:878 [inline]
slab_free_hook mm/slub.c:2295 [inline]
slab_free mm/slub.c:4580 [inline]
kmem_cache_free+0x177/0x420 mm/slub.c:4682
__do_sys_close fs/open.c:1565 [inline]
__se_sys_close fs/open.c:1550 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1550
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: 0033:0x7f510711a37f
RSP: 002b:00007ffd743e2048 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000055c96c515db0 RCX: 00007f510711a37f
RDX: 00007f51071ed860 RSI: 000055c96c5b0940 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd743e1b88
R10: 000000000000010f R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffd743e20a8 R14: 00007ffd743e24a8 R15: 000055c951222ec8
rcu: rcu_preempt kthread starved for 10529 jiffies! g9633 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: 5239 Comm: kworker/1:3 Not tainted 6.12.0-rc1-syzkaller-00196-ga354733c738d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x17/0xb0 kernel/rcu/tree.c:737
Code: 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 a8 13 89 7e e8 eb af 4a 0a 89 c3 <83> f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 50 ca 31
RSP: 0018:ffffc90000a17be0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802b281e00
RDX: ffff88802b281e00 RSI: ffffffff8c60f840 RDI: ffffffff8c60f800
RBP: ffffc90000a17ef0 R08: ffffffff8992002f R09: 1ffff110024d0baa
R10: dffffc0000000000 R11: ffffed10024d0bab R12: 1ffff11005ae0000
R13: 1ffff110024d0ba8 R14: ffff888012685d40 R15: 0000000100000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020407000 CR3: 00000000618ba000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock_bh include/linux/rcupdate.h:915 [inline]
__dev_queue_xmit+0x1698/0x3ed0 net/core/dev.c:4455
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
do_softirq+0x11b/0x1e0 kernel/softirq.c:455
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
neigh_periodic_work+0xb35/0xd50 net/core/neighbour.c:1019
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog