rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5360/1:b..l P5226/1:b..l P5373/2:b..l P1122/2:b..l
rcu: (detected by 0, t=10503 jiffies, g=6681, q=824512 ncpus=2)
task:kworker/u8:5 state:R running task stack:23120 pid:1122 tgid:1122 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6861
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6885
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x171d/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]
ip6_finish_output2+0xfc9/0x1730 net/ipv6/ip6_output.c:141
ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226
NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314
mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1819
ipv6_mc_dad_complete+0x88/0x490 net/ipv6/mcast.c:2245
addrconf_dad_completed+0x712/0xcd0 net/ipv6/addrconf.c:4342
addrconf_dad_work+0xdc2/0x16f0
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
task:syz.0.28 state:R running task stack:23088 pid:5373 tgid:5372 ppid:5228 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6861
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6885
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x171d/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]
ip6_finish_output2+0xfc9/0x1730 net/ipv6/ip6_output.c:141
ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226
NF_HOOK include/linux/netfilter.h:314 [inline]
ip6_xmit+0xef8/0x18b0 net/ipv6/ip6_output.c:366
inet6_csk_xmit+0x468/0x710 net/ipv6/inet6_connection_sock.c:135
__tcp_transmit_skb+0x1ed1/0x3b30 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_connect+0x1b7b/0x4940 net/ipv4/tcp_output.c:4143
tcp_v6_connect+0x14b1/0x1e40 net/ipv6/tcp_ipv6.c:333
__inet_stream_connect+0x262/0xf30 net/ipv4/af_inet.c:679
inet_stream_connect+0x65/0xa0 net/ipv4/af_inet.c:750
kernel_connect+0x10b/0x160 net/socket.c:3652
smc_connect+0x72c/0xde0 net/smc/af_smc.c:1679
__sys_connect_file net/socket.c:2071 [inline]
__sys_connect+0x2d1/0x300 net/socket.c:2088
__do_sys_connect net/socket.c:2098 [inline]
__se_sys_connect net/socket.c:2095 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2095
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: 0033:0x7fb67737dff9
RSP: 002b:00007fb6781af038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007fb677535f80 RCX: 00007fb67737dff9
RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007fb6773f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb677535f80 R15: 00007ffe54f8da78
task:syz-executor state:R running task stack:20560 pid:5226 tgid:5226 ppid:5213 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6861
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6885
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]
copy_pte_range mm/memory.c:1194 [inline]
copy_pmd_range+0x7b90/0x85f0 mm/memory.c:1255
copy_pud_range mm/memory.c:1292 [inline]
copy_p4d_range mm/memory.c:1316 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1414
dup_mmap kernel/fork.c:750 [inline]
dup_mm kernel/fork.c:1674 [inline]
copy_mm+0x11fb/0x1f40 kernel/fork.c:1723
copy_process+0x1845/0x3d50 kernel/fork.c:2372
kernel_clone+0x223/0x880 kernel/fork.c:2784
__do_sys_clone kernel/fork.c:2927 [inline]
__se_sys_clone kernel/fork.c:2911 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2911
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: 0033:0x7f3da1f74853
RSP: 002b:00007ffe27795188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3da1f74853
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555890f47d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000001023d R14: 00000000000101b6 R15: 00007ffe27795310
task:syz.4.20 state:R running task stack:23808 pid:5360 tgid:5360 ppid:5217 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7004
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+0xd/0x40 kernel/rcu/update.c:320
Code: f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 83 3d 4f a9 5e 04 00 <74> 1e 83 3d 96 da 5e 04 00 74 15 65 48 8b 0c 25 80 d7 03 00 31 c0
RSP: 0018:ffffc90004527a50 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffea00009e2680 RCX: 67edd587f7105300
RDX: dffffc0000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c602720
RBP: dffffc0000000000 R08: ffffffff94292807 R09: 1ffffffff2852500
R10: dffffc0000000000 R11: fffffbfff2852501 R12: 0000000000000000
R13: 1ffffd400013c4d0 R14: ffffffff82083f60 R15: ffffea00009e2680
rcu_read_lock include/linux/rcupdate.h:850 [inline]
page_ext_get+0x46/0x2a0 mm/page_ext.c:525
__page_table_check_zero+0xb1/0x350 mm/page_table_check.c:148
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1109 [inline]
free_unref_page+0xce4/0xf00 mm/page_alloc.c:2638
vfree+0x186/0x2e0 mm/vmalloc.c:3361
vb2_vmalloc_put+0x68/0xb0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:68
__vb2_buf_mem_free+0xfa/0x2a0 drivers/media/common/videobuf2/videobuf2-core.c:275
__vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:571 [inline]
__vb2_queue_free+0x452/0xb70 drivers/media/common/videobuf2/videobuf2-core.c:599
vb2_core_queue_release+0x6c/0x150 drivers/media/common/videobuf2/videobuf2-core.c:2678
v4l2_m2m_ctx_release+0x1e/0x40 drivers/media/v4l2-core/v4l2-mem2mem.c:1276
vicodec_release+0x94/0x110 drivers/media/test-drivers/vicodec/vicodec-core.c:1939
v4l2_release+0x1f5/0x3b0 drivers/media/v4l2-core/v4l2-dev.c:456
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa32357dff9
RSP: 002b:00007ffc892b8e08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fa323737a80 RCX: 00007fa32357dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa323737a80 R08: 00007fa323722000 R09: 00007ffc892b90ff
R10: 00000000005fbf94 R11: 0000000000000246 R12: 000000000001033a
R13: 00007ffc892b8f10 R14: 0000000000000032 R15: ffffffffffffffff
rcu: rcu_preempt kthread starved for 10637 jiffies! g6681 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:26144 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
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: 5309 Comm: kworker/1:7 Not tainted 6.12.0-rc2-syzkaller-00260-g9e4c6c1ad9a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:deref_stack_reg+0x1a4/0x210 arch/x86/kernel/unwind_orc.c:408
Code: 00 00 49 89 c6 48 8b 6c 24 18 48 89 e8 48 c1 e8 03 80 3c 18 00 74 08 48 89 ef e8 67 e7 b9 00 4c 89 75 00 b0 01 48 83 c4 20 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 44 89 f1 80 e1 07 80 c1
RSP: 0018:ffffc90000a17ae0 EFLAGS: 00000286
RAX: 1ffff92000142f01 RBX: ffffffff912c93bc RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc90000a11000 RDI: ffffc90000a18870
RBP: ffffc90000a17c20 R08: ffffc90000a18870 R09: 0000000000000000
R10: ffffc90000a17c30 R11: fffff52000142f88 R12: 1ffff92000142f7d
R13: 1ffff92000142f7e R14: ffffc90000a18990 R15: ffffc90000a19000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3201aff8 CR3: 000000006313e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x1799/0x22d0
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
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]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4283
kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1322 [inline]
synproxy_send_client_synack_ipv6+0x1ba/0xc30 net/netfilter/nf_synproxy_core.c:873
nft_synproxy_eval_v6 net/netfilter/nft_synproxy.c:90 [inline]
nft_synproxy_do_eval+0x739/0xa60 net/netfilter/nft_synproxy.c:145
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+0x1ea/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
spin_unlock_bh include/linux/spinlock.h:396 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x75d/0xaa0 drivers/net/netdevsim/dev.c:850
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