rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5074/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=5981, q=6 ncpus=2)
task:syz-executor237 state:R running task stack:24984 pid:5074 tgid:5074 ppid:5071 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7047
irqentry_exit+0x5e/0x90 kernel/entry/common.c:348
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x25a/0x530 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 c4 24 81 00 f6 44 24 61 02 0f 85 8e 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90004286ec0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000850de4 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8baac7e0 RDI: ffffffff8bfd99e0
RBP: ffffc90004287008 R08: ffffffff92c58427 R09: 1ffffffff258b084
R10: dffffc0000000000 R11: fffffbfff258b085 R12: 1ffff92000850de0
R13: dffffc0000000000 R14: ffffc90004286f20 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
is_bpf_text_address+0x42/0x2b0 kernel/bpf/core.c:762
kernel_text_address+0xa7/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0x124/0x1b0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x117/0x1d0 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:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc+0x16f/0x340 mm/slub.c:3867
kmem_cache_zalloc include/linux/slab.h:701 [inline]
fill_pool lib/debugobjects.c:168 [inline]
debug_objects_fill_pool+0x7e6/0x9b0 lib/debugobjects.c:615
__debug_object_init+0xa4/0x400 lib/debugobjects.c:627
debug_timer_init kernel/time/timer.c:774 [inline]
debug_init kernel/time/timer.c:822 [inline]
init_timer_key+0x38/0x2f0 kernel/time/timer.c:866
ipv6_add_dev+0x1c5/0x1290 net/ipv6/addrconf.c:388
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3608
notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2004 [inline]
call_netdevice_notifiers net/core/dev.c:2018 [inline]
register_netdevice+0x151f/0x19c0 net/core/dev.c:10294
register_netdev+0x3b/0x50 net/core/dev.c:10393
ip6_tnl_init_net+0x238/0x2f0 net/ipv6/ip6_tunnel.c:2270
ops_init+0x352/0x610 net/core/net_namespace.c:136
setup_net+0x4d1/0xbc0 net/core/net_namespace.c:339
copy_net_ns+0x4e3/0x7b0 net/core/net_namespace.c:495
create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x122/0x180 kernel/nsproxy.c:228
ksys_unshare+0x616/0xc00 kernel/fork.c:3428
__do_sys_unshare kernel/fork.c:3499 [inline]
__se_sys_unshare kernel/fork.c:3497 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3497
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f72abacc2f7
RSP: 002b:00007fff016181d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fff01618208 RCX: 00007f72abacc2f7
RDX: 00007f72abacae79 RSI: 00007fff01618280 RDI: 0000000040000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000555556734370
R13: 0000000000000003 R14: 0000000000000003 R15: 00007fff01618240
rcu: rcu_preempt kthread starved for 10564 jiffies! g5981 f0x0 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:26104 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2183
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5095 Comm: syz-executor237 Not tainted 6.8.0-rc6-syzkaller-00278-g58c806d867bf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:entry_SYSCALL_64+0x24/0x2d arch/x86/entry/entry_64.S:95
Code: cc cc cc cc cc cc f3 0f 1e fa 0f 01 f8 65 48 89 24 25 14 a0 00 00 66 90 0f 20 dc 0f 1f 44 00 00 48 81 e4 ff e7 ff ff 0f 22 dc <65> 48 8b 24 25 d8 be 03 00 6a 2b 65 ff 34 25 14 a0 00 00 41 53 6a
RSP: 0018:0000000023572000 EFLAGS: 00000006
RAX: 0000000000000027 RBX: 00007fff01617d70 RCX: 00007f72abac9387
RDX: 00007fff01617c40 RSI: 00007fff01617d70 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000555556734370
R13: 0000000000000004 R14: 00007fff01618250 R15: 00007fff01618240
FS: 00005555567343c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000023572000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sched: RT throttling activated