rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=b5dc/1/0x4000000000000000 softirq=9182/9182 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5653/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=12297, q=358 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5641 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:kasan_check_range+0x1ba/0x290 mm/kasan/generic.c:189
Code: fb 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b 41 5c <41> 5e 41 5f 5d c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00 00 75
RSP: 0018:ffffc90000a08c00 EFLAGS: 00000056
RAX: f31135873ccb7601 RBX: 0000000000000010 RCX: ffffffff84a4bfea
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90000a08c80
RBP: 0000000000000000 R08: ffffc90000a08c8f R09: 1ffff92000141191
R10: dffffc0000000000 R11: fffff52000141192 R12: ffffc90000a08c80
R13: ffff88805d811340 R14: dffffc0000000001 R15: fffff52000141192
FS: 00007f5a2e5306c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9493fa8000 CR3: 000000001f354000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__asan_memset+0x23/0x50 mm/kasan/shadow.c:84
debug_object_deactivate+0x9a/0x390 lib/debugobjects.c:753
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x200 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1660 [inline]
__hrtimer_run_queues+0x30f/0xd00 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d 6c cd 1a 0c 48 89 de 5b e9 03 ad 54 00 0f 1f 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 0c 25 40 d0 03 00 65 8b 15 e0 db 6e 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc900149df768 EFLAGS: 00000246
RAX: ffffffff8b66a34c RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffffc900091c9000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000000 R08: ffffffff8b66acb1 R09: 1ffffffff2595ca0
R10: dffffc0000000000 R11: fffffbfff2595ca1 R12: 0000000000000000
R13: 1ffff11004ec1160 R14: dffffc0000000000 R15: ffff888027608b00
xas_load+0x12c/0x150
filemap_get_entry+0x1fe/0x4e0 mm/filemap.c:1816
shmem_get_folio_gfp+0x2a8/0x1f50 mm/shmem.c:1988
shmem_get_folio mm/shmem.c:2166 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2750
generic_perform_write+0x322/0x640 mm/filemap.c:3930
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2926
call_write_iter include/linux/fs.h:2108 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa84/0xcb0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f5a2d87cbaf
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f5a2e52fe80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f5a2d87cbaf
RDX: 0000000001000000 RSI: 00007f5a23600000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009804
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000005
R13: 00007f5a2e52ff80 R14: 00007f5a2e52ff40 R15: 00007f5a23600000
task:syz-executor.0 state:R running task stack:24632 pid:5653 tgid:5653 ppid:5073 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1781/0x49d0 kernel/sched/core.c:6736
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6915
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6939
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
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
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x1db/0x360 mm/slub.c:3997
kmalloc include/linux/slab.h:628 [inline]
kzalloc include/linux/slab.h:749 [inline]
ref_tracker_alloc+0x14b/0x490 lib/ref_tracker.c:203
__netns_tracker_alloc include/net/net_namespace.h:331 [inline]
netns_tracker_alloc include/net/net_namespace.h:340 [inline]
nf_nat_masq_schedule+0x3f9/0x650 net/netfilter/nf_nat_masquerade.c:126
masq_inet6_event+0x130/0x190 net/netfilter/nf_nat_masquerade.c:295
notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93
atomic_notifier_call_chain+0xdb/0x180 kernel/notifier.c:231
addrconf_ifdown+0xef7/0x1bc0 net/ipv6/addrconf.c:3978
addrconf_notify+0x3cb/0x1020
notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:1988 [inline]
call_netdevice_notifiers net/core/dev.c:2002 [inline]
dev_close_many+0x33c/0x4c0 net/core/dev.c:1543
unregister_netdevice_many_notify+0x544/0x16d0 net/core/dev.c:11071
unregister_netdevice_many net/core/dev.c:11154 [inline]
unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11033
unregister_netdevice include/linux/netdevice.h:3115 [inline]
__tun_detach+0x6b6/0x1600 drivers/net/tun.c:685
tun_detach drivers/net/tun.c:701 [inline]
tun_chr_close+0x108/0x1b0 drivers/net/tun.c:3498
__fput+0x429/0x8a0 fs/file_table.c:422
__do_sys_close fs/open.c:1556 [inline]
__se_sys_close fs/open.c:1541 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1541
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f0050e7cd5a
RSP: 002b:00007fff94d54090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f0050e7cd5a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b30820000 R09: 0000000000000269
R10: 0000000081360ad3 R11: 0000000000000293 R12: 00007f0050a00440
R13: ffffffffffffffff R14: 00007f0050a00000 R15: 000000000001a5c3
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g12297 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=5953
rcu: rcu_preempt kthread starved for 10502 jiffies! g12297 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26256 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1781/0x49d0 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243