rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10059/1:b..l
rcu: (detected by 1, t=10506 jiffies, g=63913, q=543 ncpus=2)
task:syz-executor state:R running task stack:22472 pid:10059 tgid:10059 ppid:10045 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235
irqentry_exit+0x599/0x620 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:851 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
RIP: 0010:unwind_next_frame+0xcd/0x23c0 arch/x86/kernel/unwind_orc.c:495
Code: 00 00 48 c7 c7 e0 e3 75 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 57 e8 6e 09 2b 00 48 83 c4 08 e8 f5 69 37 0a 85 c0 <74> 3a e8 8c 33 34 00 84 c0 75 31 e8 e3 69 37 0a 85 c0 74 28 80 3d
RSP: 0018:ffffc900037771b8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff822fb32c RCX: ffff888027de8000
RDX: 000000005a44979c RSI: ffffffff8e165594 RDI: ffffffff8c27b380
RBP: dffffc0000000000 R08: ffffffff81767de5 R09: ffffffff8e75e3e0
R10: dffffc0000000000 R11: ffffffff81b0bfa0 R12: 1ffff920006eee51
R13: ffffc900037772c0 R14: ffffc90003777288 R15: ffffffff81767de5
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
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4542 [inline]
slab_alloc_node mm/slub.c:4869 [inline]
kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4921
alloc_vmap_area+0x229/0x14b0 mm/vmalloc.c:2065
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232
__vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024
__vmalloc_node_noprof mm/vmalloc.c:4124 [inline]
vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4202
__do_replace+0xb3/0x9a0 net/ipv6/netfilter/ip6_tables.c:1063
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0xb4e/0xe10 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2322
__sys_setsockopt net/socket.c:2347 [inline]
__do_sys_setsockopt net/socket.c:2353 [inline]
__se_sys_setsockopt net/socket.c:2350 [inline]
__x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2350
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f349cd9dfda
RSP: 002b:00007ffef47bdfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffef47be040 RCX: 00007f349cd9dfda
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000000000
R10: 00007f349cfe8960 R11: 0000000000000206 R12: 00007f349cfe8900
R13: 00007ffef47bdfdc R14: 0000000000000000 R15: 00007f349cfe8fc0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g63913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=59578
rcu: rcu_preempt kthread starved for 10506 jiffies! g63913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27656 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7005
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+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10744 Comm: syz.0.737 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:mark_lock+0xd/0x190 kernel/locking/lockdep.c:4722
Code: 2c 24 e9 b6 fd ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 8b 46 20 <89> c1 81 e1 00 00 03 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08
RSP: 0018:ffffc900035278b0 EFLAGS: 00000006
RAX: 00000000000c01fc RBX: ffff88804bba6720 RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffff88804bba6700 RDI: ffff88804bba5b80
RBP: ffff88804bba6700 R08: ffffffff84fe46fa R09: ffffffff8ef50598
R10: dffffc0000000000 R11: fffffbfff1dea0b1 R12: 0000000000000003
R13: ffff88804bba6700 R14: ffff88804bba5b80 R15: 0000000000000001
FS: 00007f26a450a6c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002a3030 CR3: 0000000024bed000 CR4: 0000000000350ef0
Call Trace:
mark_usage kernel/locking/lockdep.c:4674 [inline]
__lock_acquire+0x6b5/0x2cf0 kernel/locking/lockdep.c:5191
lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
vga_put drivers/pci/vgaarb.c:547 [inline]
vga_arb_release+0x1fa/0x5d0 drivers/pci/vgaarb.c:1425
__fput+0x44f/0xa70 fs/file_table.c:469
task_work_run+0x1d9/0x270 kernel/task_work.c:233
get_signal+0x11eb/0x1330 kernel/signal.c:2807
arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f26a359c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f26a450a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: fffffffffffffffc RBX: 00007f26a3816090 RCX: 00007f26a359c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000060000600
RBP: 00007f26a3632bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26a3816128 R14: 00007f26a3816090 R15: 00007ffc694947d8