ip6_tunnel: ip6gre2 xmit: Local address not yet configured!
ip6_tunnel: ip6gre2 xmit: Local address not yet configured!
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=2e9c/1/0x4000000000000000 softirq=109830/109832 fqs=1
rcu: (detected by 0, t=10510 jiffies, g=139389, q=1181 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1317 Comm: syz.0.7346 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rb_link_linked_node include/linux/rbtree.h:256 [inline]
RIP: 0010:__rb_add include/linux/rbtree.h:237 [inline]
RIP: 0010:rb_add_linked include/linux/rbtree.h:281 [inline]
RIP: 0010:timerqueue_linked_add+0x12f/0x2e0 lib/timerqueue.c:96
Code: f8 48 c1 e8 03 80 3c 28 00 74 05 e8 9b ee 8b f6 49 89 5d 18 49 8d 7d 20 48 89 f8 48 c1 e8 03 80 3c 28 00 74 05 e8 81 ee 8b f6 <4d> 89 75 20 4d 89 6e 18 4d 8b 65 18 4d 85 e4 48 8b 1c 24 0f 84 c2
RSP: 0018:ffffc90000a08d58 EFLAGS: 00000046
RAX: 1ffff1100ba5ea64 RBX: 0000000000000000 RCX: ffff8880aaa11ec0
RDX: 0000000000010000 RSI: 00000133e08a17ba RDI: ffff88805d2f5320
RBP: dffffc0000000000 R08: ffffffff9030d4f7 R09: 1ffffffff2061a9e
R10: dffffc0000000000 R11: fffffbfff2061a9f R12: ffff8880b8729038
R13: ffff88805d2f5300 R14: ffff8880b8729020 R15: ffff8880b8729030
FS: 000055557daa8500(0000) GS:ffff888125387000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb88e634e9c CR3: 000000004ee3a000 CR4: 00000000003526f0
Call Trace:
enqueue_hrtimer+0x18e/0x2c0 kernel/time/hrtimer.c:1117
__run_hrtimer kernel/time/hrtimer.c:1946 [inline]
__hrtimer_run_queues+0x4d2/0xa20 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x90 kernel/kcov.c:315
Code: 74 11 18 48 89 44 11 20 c3 cc cc cc cc cc 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 <48> 8b 04 24 65 48 8b 15 f8 c6 73 11 65 8b 0d 19 c7 73 11 81 e1 00
RSP: 0018:ffffc9000cd0f2d8 EFLAGS: 00000246
RAX: ffffffff8ba2c0cb RBX: 0000000000000001 RCX: ffff8880aaa11ec0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000cd0f4d0 R08: ffff8880aaa11ec0 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff1100eca9440
R13: dffffc0000000000 R14: ffff88802cc4d800 R15: ffff88807654a21c
ma_slots lib/maple_tree.c:685 [inline]
mt_validate_nulls lib/maple_tree.c:6896 [inline]
mt_validate+0x3b14/0x41f0 lib/maple_tree.c:6953
validate_mm+0xd4/0x4c0 mm/vma.c:652
mmap_region+0x15f0/0x22a0 mm/vma.c:2863
do_mmap+0xc39/0x10c0 mm/mmap.c:560
vm_mmap_pgoff+0x2c9/0x4f0 mm/util.c:581
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf4979cbc2
Code: 4f 01 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6e 5b 5d c3 0f 1f 00 48 c7 c0 e8 ff ff ff 64
RSP: 002b:00007fff84bb5d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdf4979cbc2
RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000
RBP: 0000000000020022 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 00007fff84bb5ea0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10498 jiffies! g139389 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:27544 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x389/0x470 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:
CPU: 0 UID: 0 PID: 14710 Comm: kworker/u8:44 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfcf/0x13d0 kernel/smp.c:892
Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 7a 06 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 25 02 0c 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 0a 02 0c
RSP: 0018:ffffc9000d417700 EFLAGS: 00000293
RAX: ffffffff81b9c2b6 RBX: ffff8880b863c148 RCX: ffff888051723d80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d417840 R08: ffffffff9030d4f7 R09: 1ffffffff2061a9e
R10: dffffc0000000000 R11: fffffbfff2061a9f R12: 1ffff110170e8169
R13: dffffc0000000000 R14: ffff8880b8740b48 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888125287000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdab345b890 CR3: 000000000e74a000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057
on_each_cpu include/linux/smp.h:72 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline]
smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2983
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:906
process_one_work kernel/workqueue.c:3314 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
kthread+0x389/0x470 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