rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17484/1:b..l P28273/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=127253, q=176544 ncpus=2)
task:syz-executor state:R running task stack:28168 pid:28273 tgid:28273 ppid:18133 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 61 0f 2d 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 4b 6a ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 98 df b8
RSP: 0018:ffffc9000594f6c0 EFLAGS: 00000286
RAX: 165a281a63f65200 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000274177c0 RSI: ffffffff8e4af75f RDI: ffffffff8c4bd380
RBP: ffffffff81afdd2d R08: ffffffff81afdd2d R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
is_module_text_address+0x39/0x1e0 kernel/module/main.c:3921
kernel_text_address+0x94/0xe0 kernel/extable.c:119
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385
arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
__slab_free+0x274/0x2c0 mm/slub.c:5767
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4612 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__do_kmalloc_node mm/slub.c:5361 [inline]
__kmalloc_noprof+0x311/0x720 mm/slub.c:5387
_kmalloc_noprof include/linux/slab.h:973 [inline]
_kmalloc_array_noprof include/linux/slab.h:1189 [inline]
security_inode_init_security+0x102/0x3e0 security/security.c:1347
shmem_symlink+0xe0/0x460 mm/shmem.c:4034
vfs_symlink+0x18b/0x330 fs/namei.c:5660
filename_symlinkat+0x1cd/0x410 fs/namei.c:5685
__do_sys_symlinkat fs/namei.c:5705 [inline]
__se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5700
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdaa79cf57
RSP: 002b:00007ffcfa8f54d8 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efdaa79cf57
RDX: 00007efdaa834e68 RSI: 00000000ffffff9c RDI: 00007ffcfa8f5570
RBP: 00007ffcfa8f551c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000001f5
R13: 00000000000927c0 R14: 000000000008c3bc R15: 00007ffcfa8f5570
task:syz-executor state:R running task stack:22576 pid:17484 tgid:17484 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7413
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:190
spin_unlock include/linux/spinlock.h:390 [inline]
zap_pte_range mm/memory.c:1964 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0x4084/0x4f10 mm/memory.c:2109
unmap_vmas+0x390/0x550 mm/memory.c:2178
exit_mmap+0x293/0x9f0 mm/mmap.c:1300
__mmput+0x118/0x420 kernel/fork.c:1187
exit_mm+0x221/0x2d0 kernel/exit.c:610
do_exit+0x6cd/0x2360 kernel/exit.c:992
do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
get_signal+0x121b/0x12c0 kernel/signal.c:3038
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f710e15e6ce
RSP: 002b:00007ffce888c438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00005555704bc500 RCX: 00007f710e15e6ce
RDX: 00007ffce888c490 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffce888c4fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000231
R13: 0000000000000061 R14: 000000000008c555 R15: 00007ffce888c550
rcu: rcu_preempt kthread starved for 794 jiffies! g127253 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:27496 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14342 Comm: ipvs-m:2:0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__sanitizer_cov_trace_switch+0xe1/0xf0 kernel/kcov.c:352
Code: 63 28 4d 39 fc 77 9d 49 ff c6 4d 89 33 49 89 4c 1b 08 4d 89 54 1b 10 49 89 7c 1b 18 49 89 54 1b 20 eb 81 5b 41 5c 41 5e 41 5f cc cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc90000005df8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000001
RDX: ffffffff89b7b7e5 RSI: ffffffff90043ee0 RDI: 0000000000000001
RBP: ffffc90000005f10 R08: ffff888078df1f00 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000100 R12: dffffc0000000000
R13: ffff8880753e2780 R14: 0000000000000001 R15: ffff8880558a7500
FS: 0000000000000000(0000) GS:ffff888124f57000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1f8e00218 CR3: 000000000e946000 CR4: 00000000003526f0
Call Trace:
fib_rules_lookup+0x6b5/0xeb0 net/core/fib_rules.c:326
__fib_lookup+0x106/0x210 net/ipv4/fib_rules.c:96
ip_route_output_key_hash_rcu+0x294/0x2720 net/ipv4/route.c:2811
ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2702
__ip_route_output_key include/net/route.h:169 [inline]
ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2929
ip_route_output_key include/net/route.h:179 [inline]
udp_tunnel_dst_lookup+0x1eb/0x440 net/ipv4/udp_tunnel_core.c:255
geneve_xmit_skb drivers/net/geneve.c:1350 [inline]
geneve_xmit+0xf1b/0x32d0 drivers/net/geneve.c:1563
__netdev_start_xmit include/linux/netdevice.h:5400 [inline]
netdev_start_xmit include/linux/netdevice.h:5409 [inline]
xmit_one net/core/dev.c:3889 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4878
dev_queue_xmit include/linux/netdevice.h:3446 [inline]
vlan_dev_hard_start_xmit+0x201/0x420 net/8021q/vlan_dev.c:126
__netdev_start_xmit include/linux/netdevice.h:5400 [inline]
netdev_start_xmit include/linux/netdevice.h:5409 [inline]
xmit_one net/core/dev.c:3889 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4878
dev_queue_xmit include/linux/netdevice.h:3446 [inline]
br_dev_queue_push_xmit+0x370/0x4b0 net/bridge/br_forward.c:53
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318
br_nf_post_routing+0xa53/0xee0 net/bridge/br_netfilter_hooks.c:964
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline]
br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:667
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318
br_nf_forward_ip+0x7eb/0xa30 net/bridge/br_netfilter_hooks.c:721
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
__br_forward+0x397/0x540 net/bridge/br_forward.c:115
br_handle_frame_finish+0x1175/0x1990 net/bridge/br_input.c:229
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6099
__netif_receive_skb_one_core net/core/dev.c:6210 [inline]
__netif_receive_skb net/core/dev.c:6325 [inline]
process_backlog+0x706/0x1860 net/core/dev.c:6676
__napi_poll+0xaa/0x330 net/core/dev.c:7735
napi_poll net/core/dev.c:7798 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7955
handle_softirqs+0x225/0x840 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
get_curr_sync_buff net/netfilter/ipvs/ip_vs_sync.c:401 [inline]
next_sync_buff net/netfilter/ipvs/ip_vs_sync.c:1646 [inline]
sync_thread_master+0x5d6/0x11b0 net/netfilter/ipvs/ip_vs_sync.c:1662
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
ip6_tunnel: ip6gretap0 xmit: Local address not yet configured!
net_ratelimit: 3277 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
net_ratelimit: 3310 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:2e:67:d9:83:3a:89, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)