rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P924/1:b..l P10450/1:b..l P10864/1:b..l P10873/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=106253, q=2562322 ncpus=2)
task:syz.1.540 state:R running task stack:23648 pid:10873 tgid:10872 ppid:10468 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6786
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6810
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
tun_rx_batched+0x732/0x8f0
tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007
tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xa6f/0xc90 fs/read_write.c:683
ksys_write+0x1a0/0x2c0 fs/read_write.c:736
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: 0033:0x7f064eb7c9df
RSP: 002b:00007f064fa01000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f064ed35f80 RCX: 00007f064eb7c9df
RDX: 000000000000003a RSI: 0000000020000440 RDI: 00000000000000c8
RBP: 00007f064ebf0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003a R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f064ed35f80 R15: 00007ffd0ee55238
task:syz-executor state:R running task stack:23680 pid:10864 tgid:10864 ppid:5214 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6929
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:srso_alias_safe_ret+0x5/0x7 arch/x86/lib/retpoline.S:174
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8d 64 24 08 cc e8 f4 ff ff ff 0f 0b cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc900033ff368 EFLAGS: 00000293
RAX: ffffffff8208c31a RBX: 0000000000000001 RCX: ffff88802f0c3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000140 R08: ffffffff8208c30d R09: 1ffffffff2849ef0
R10: dffffc0000000000 R11: fffffbfff2849ef1 R12: 0000000000050dc5
R13: 0000000000000001 R14: ffffffff8208c190 R15: ffff88801bf00000
lookup_page_ext mm/page_ext.c:254 [inline]
page_ext_get+0x1aa/0x2a0 mm/page_ext.c:526
__set_page_owner+0x9e/0x800 mm/page_owner.c:322
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
get_free_pages_noprof+0xc/0x30 mm/page_alloc.c:4749
kasan_populate_vmalloc_pte+0x38/0xe0 mm/kasan/shadow.c:304
apply_to_pte_range mm/memory.c:2814 [inline]
apply_to_pmd_range mm/memory.c:2858 [inline]
apply_to_pud_range mm/memory.c:2894 [inline]
apply_to_p4d_range mm/memory.c:2930 [inline]
__apply_to_page_range+0x8aa/0xe50 mm/memory.c:2964
alloc_vmap_area+0x1d52/0x2400 mm/vmalloc.c:2035
__get_vm_area_node+0x1a9/0x270 mm/vmalloc.c:3122
__vmalloc_node_range_noprof+0x3c6/0x1400 mm/vmalloc.c:3797
vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3991
kcov_ioctl+0x56/0x640 kernel/kcov.c:716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:893
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: 0033:0x7f811b57dafb
RSP: 002b:00007ffdd45dcdc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007f811b57dafb
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000e0
RBP: 00007f811b7366d8 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
task:syz-executor state:R running task stack:19952 pid:10450 tgid:10450 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6786
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6810
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x18f8/0x22d0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2619
vfree+0x186/0x2e0 mm/vmalloc.c:3367
kcov_put kernel/kcov.c:439 [inline]
kcov_close+0x28/0x50 kernel/kcov.c:535
__fput+0x241/0x880 fs/file_table.c:431
task_work_run+0x251/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x27f0 kernel/exit.c:882
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04f9374157
RSP: 002b:00007fff342ef550 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007f04f9374157
RDX: 0000000040000000 RSI: 00007fff342ef5ac RDI: 00000000ffffffff
RBP: 00007fff342ef5ac R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000055558bbbf5eb
R13: 000055558bbbf590 R14: 000000000012fa7f R15: 00007fff342ef600
task:kworker/u8:5 state:R running task stack:20944 pid:924 tgid:924 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6929
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:lock_acquire+0x9e/0x550 kernel/locking/lockdep.c:5790
Code: ec 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4b 89 04 2c 43 c7 44 2c 09 f2 f2 f2 00 43 c7 44 2c 11 f3 f3 f3 f3 66 43 c7 44 2c 15 f3 f3 <43> c6 44 2c 17 f3 0f 1f 44 00 00 65 8b 05 7c ac 93 7e 83 f8 08 0f
RSP: 0018:ffffc90003b3f860 EFLAGS: 00000216
RAX: f2f2f200f1f1f1f1 RBX: 00000000000003fc RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e9389e0
RBP: ffffc90003b3f9a8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff2038b06 R12: 1ffff92000767f14
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802f911fe0
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:825 [inline]
batadv_iv_ogm_schedule+0x43f/0x10a0 net/batman-adv/bat_iv_ogm.c:868
batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10631 jiffies! g106253 f0x2 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:24912 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
__schedule_loop kernel/sched/core.c:6684 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6699
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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5290 Comm: kworker/0:5 Not tainted 6.11.0-syzkaller-07462-g1868f9d0260e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:__kernel_text_address+0xf/0x40 kernel/extable.c:79
Code: a2 9c 00 eb b5 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 48 89 fb e8 43 00 00 00 85 c0 <0f> 95 c0 48 c7 c1 00 70 7a 91 48 39 cb 0f 93 c1 48 c7 c2 cf 28 95
RSP: 0018:ffffc90000006cb0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff815e8255 RCX: 0000000080000101
RDX: dffffc0000000000 RSI: ffffc900030c8000 RDI: ffffffff815e8255
RBP: ffffc90000006d70 R08: ffffc900030cfbb0 R09: ffffc90000006d30
R10: dffffc0000000000 R11: fffff52000000da8 R12: ffff888060945a00
R13: ffffffff81807a70 R14: dffffc0000000000 R15: 1ffff92000000da5
FS: 0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3091bff8 CR3: 000000000e734000 CR4: 0000000000350ef0
Call Trace:
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
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4086 [inline]
slab_alloc_node mm/slub.c:4135 [inline]
kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142
fill_pool lib/debugobjects.c:168 [inline]
debug_objects_fill_pool+0x7b9/0x9f0 lib/debugobjects.c:615
debug_object_activate+0x135/0x510 lib/debugobjects.c:704
debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
__call_rcu_common kernel/rcu/tree.c:3071 [inline]
call_rcu+0x97/0xa70 kernel/rcu/tree.c:3190
slab_free_hook mm/slub.c:2307 [inline]
slab_free mm/slub.c:4580 [inline]
kmem_cache_free+0x2fd/0x420 mm/slub.c:4682
nf_conntrack_free+0x2fd/0x390 net/netfilter/nf_conntrack_core.c:1689
nf_ct_put include/net/netfilter/nf_conntrack.h:186 [inline]
nf_conntrack_in+0xb51/0x1890 net/netfilter/nf_conntrack_core.c:2015
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
__netif_receive_skb_one_core net/core/dev.c:5662 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
process_backlog+0x662/0x15b0 net/core/dev.c:6107
__napi_poll+0xcd/0x490 net/core/dev.c:6771
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6962
handle_softirqs+0x2c7/0x980 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+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244