ip6_tunnel: ip6gretap0 xmit: Local address not yet configured!
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=1614/1/0x4000000000000000 softirq=110477/110477 fqs=2
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21000/1:b..l P11825/1:b..l
rcu: (detected by 0, t=10506 jiffies, g=129721, q=465 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16787 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__remove_hrtimer+0x91/0x3e0 kernel/time/hrtimer.c:1145
Code: fd 12 00 45 85 ed 48 89 5c 24 08 74 2a 48 8d 7b 18 be ff ff ff ff e8 ae 7b f6 09 41 89 c5 31 ff 89 c6 e8 52 fd 12 00 45 85 ed <0f> 84 33 02 00 00 e8 04 f9 12 00 eb 05 e8 fd f8 12 00 4d 8d 6e 38
RSP: 0018:ffffc90000a08d90 EFLAGS: 00000002
RAX: ffffffff81b2cbae RBX: ffff8880b8728280 RCX: 0000000000010000
RDX: ffff88805c335c40 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff9a64b2e3 R09: 1ffffffff34c965c
R10: dffffc0000000000 R11: fffffbfff34c965d R12: 0000000000000000
R13: 0000000000000001 R14: ffff888028f52300 R15: ffff8880b87284c0
FS: 0000555583188500(0000) GS:ffff888125387000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4899d456b8 CR3: 0000000045c0a000 CR4: 0000000000350ef0
DR0: 0000000000000004 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1910 [inline]
__hrtimer_run_queues+0x299/0xa20 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:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:752
Code: e8 5b 82 fe 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 90 b7 26 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 cc 26 86 00 48 c7 c3 d8 c9 3a 93 49 03 1e 48 89
RSP: 0018:ffffc90008b97288 EFLAGS: 00000246
RAX: 1ffffffff1c4d6f3 RBX: 0000000000000001 RCX: 0000000080000003
RDX: ffff88805c335c40 RSI: ffffffff8c28b640 RDI: ffffffff8c28b600
RBP: ffff88801e08e1c0 R08: ffff88801e08e1bf R09: 1ffff11003c11c37
R10: dffffc0000000000 R11: ffffed1003c11c38 R12: ffffffff823c9fd6
R13: 0000000000000005 R14: ffffffff8e26b798 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:867 [inline]
page_table_check_set+0x443/0x510 mm/page_table_check.c:124
page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
set_ptes include/linux/pgtable.h:413 [inline]
__copy_present_ptes mm/memory.c:1118 [inline]
copy_present_ptes mm/memory.c:1197 [inline]
copy_pte_range mm/memory.c:1320 [inline]
copy_pmd_range+0x486a/0x5970 mm/memory.c:1408
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0xbe8/0x11f0 mm/memory.c:1555
dup_mmap+0xf40/0x1d90 mm/mmap.c:1840
dup_mm kernel/fork.c:1534 [inline]
copy_mm+0x13b/0x4a0 kernel/fork.c:1586
copy_process+0x1f1c/0x4440 kernel/fork.c:2264
kernel_clone+0x284/0x8f0 kernel/fork.c:2721
__do_sys_clone kernel/fork.c:2862 [inline]
__se_sys_clone kernel/fork.c:2846 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2846
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: 0033:0x7f94d19c58d2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff53fb0980 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff53fb0980 RCX: 00007f94d19c58d2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff53fb0b0c R08: 0000000000000000 R09: 0000000000000001
R10: 00005555831887d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000ab6ce R15: 00007fff53fb0b60
task:syz-executor state:R running task stack:22360 pid:11825 tgid:11825 ppid:11816 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 f1 8d 07 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 db d8 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 ab 89 6e ff cc 48 8d 3d 88 7c 92
RSP: 0018:ffffc90009db73d8 EFLAGS: 00000286
RAX: 6628245f9e476000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8e22037a RDI: ffffffff8c28b660
RBP: ffffffff8176f256 R08: ffffffff8176f256 R09: ffffffff8e95cca0
R10: dffffc0000000000 R11: ffffffff81b0f020 R12: 0000000000000002
R13: ffffffff8e95cca0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xc3/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5296 [inline]
__kvmalloc_node_noprof+0x528/0x8a0 mm/slub.c:6833
alloc_fdtable+0x169/0x2c0 fs/file.c:224
dup_fd+0x84f/0xb40 fs/file.c:420
copy_files+0xc8/0x120 kernel/fork.c:1639
copy_process+0x1d94/0x4440 kernel/fork.c:2252
kernel_clone+0x284/0x8f0 kernel/fork.c:2721
__do_sys_clone kernel/fork.c:2862 [inline]
__se_sys_clone kernel/fork.c:2846 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2846
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: 0033:0x7f4898fc58d2
RSP: 002b:00007ffe3448ccd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe3448ccd0 RCX: 00007f4898fc58d2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe3448ce5c R08: 0000000000000000 R09: 0000000000000001
R10: 000055557e1f87d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000ab62c R15: 00007ffe3448ceb0
task:syz.9.5279 state:R running task stack:25464 pid:21000 tgid:20999 ppid:13925 task_flags:0x20400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7370
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
_raw_spin_unlock_irq+0x45/0x50 kernel/locking/spinlock.c:206
spin_unlock_irq include/linux/spinlock.h:402 [inline]
loop_queue_work drivers/block/loop.c:863 [inline]
loop_queue_rq+0x9f8/0xb00 drivers/block/loop.c:1889
__blk_mq_issue_directly block/blk-mq.c:2725 [inline]
blk_mq_request_issue_directly+0x3bb/0x6d0 block/blk-mq.c:2812
blk_mq_issue_direct+0x2a0/0x660 block/blk-mq.c:2833
blk_mq_dispatch_queue_requests+0x6fe/0x800 block/blk-mq.c:2908
blk_mq_flush_plug_list+0x456/0x570 block/blk-mq.c:2991
__blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1230
blk_finish_plug block/blk-core.c:1257 [inline]
__submit_bio+0x28d/0x580 block/blk-core.c:649
__submit_bio_noacct_mq block/blk-core.c:722 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
submit_bh fs/buffer.c:2742 [inline]
__bread_slow fs/buffer.c:1169 [inline]
__bread_gfp+0x216/0x3b0 fs/buffer.c:1415
sb_bread include/linux/buffer_head.h:346 [inline]
exfat_load_upcase_table fs/exfat/nls.c:668 [inline]
exfat_create_upcase_table+0x829/0xe70 fs/exfat/nls.c:775
__exfat_fill_super fs/exfat/super.c:625 [inline]
exfat_fill_super+0x1239/0x2a50 fs/exfat/super.c:687
get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
vfs_get_tree+0x92/0x2a0 fs/super.c:1754
fc_mount fs/namespace.c:1193 [inline]
do_new_mount_fc fs/namespace.c:3758 [inline]
do_new_mount+0x341/0xd30 fs/namespace.c:3834
do_mount fs/namespace.c:4167 [inline]
__do_sys_mount fs/namespace.c:4383 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4360
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: 0033:0x7f764b59e0ca
RSP: 002b:00007f764c372e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f764c372ee0 RCX: 00007f764b59e0ca
RDX: 0000200000002bc0 RSI: 00002000000002c0 RDI: 00007f764c372ea0
RBP: 0000200000002bc0 R08: 00007f764c372ee0 R09: 0000000000000804
R10: 0000000000000804 R11: 0000000000000246 R12: 00002000000002c0
R13: 00007f764c372ea0 R14: 000000000000152f R15: 00002000000001c0
rcu: rcu_preempt kthread starved for 10495 jiffies! g129721 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:27968 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: 139 Comm: kworker/u8:6 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
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+0xfd4/0x13d0 kernel/smp.c:892
Code: 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 00 eb e5 44 89
RSP: 0018:ffffc90002eaf700 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b863c148 RCX: ffff88801f7d1ec0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002eaf840 R08: ffffffff9030d5f7 R09: 1ffffffff2061abe
R10: dffffc0000000000 R11: fffffbfff2061abf 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: 0000561296df5dc8 CR3: 000000000e74a000 CR4: 0000000000350ef0
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