rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14519/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=141649, q=119 ncpus=2)
task:syz-executor state:R running task stack:21960 pid:14519 tgid:14519 ppid:14496 task_flags:0x400140 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5948
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 89 83 3a 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90003fd7c38 EFLAGS: 00000206
RAX: 37f4dc0a908b6400 RBX: 0000000000000000 RCX: 37f4dc0a908b6400
RDX: ffff88802a950000 RSI: ffffffff8db5aaa7 RDI: ffffffff8be1b7c0
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff893d8d2f
R10: dffffc0000000000 R11: ffffed100cb36384 R12: 0000000000000246
R13: ffff88802a950000 R14: ffffffff8e13ee60 R15: 0000000000000001
lock_is_held include/linux/lockdep.h:249 [inline]
rcu_read_lock_sched_held+0x89/0x100 kernel/rcu/update.c:126
task_css include/linux/cgroup.h:453 [inline]
task_netprioidx include/net/netprio_cgroup.h:28 [inline]
sock_update_netprioidx+0x12e/0x3a0 include/net/netprio_cgroup.h:39
sk_alloc+0x246/0x370 net/core/sock.c:2329
inet_create+0x76b/0x1000 net/ipv4/af_inet.c:326
__sock_create+0x4b3/0x9f0 net/socket.c:1541
sock_create net/socket.c:1599 [inline]
__sys_socket_create net/socket.c:1636 [inline]
__sys_socket+0xd7/0x1b0 net/socket.c:1683
__do_sys_socket net/socket.c:1697 [inline]
__se_sys_socket net/socket.c:1695 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1695
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8538d90847
RSP: 002b:00007ffc6aef8258 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f8538f7e2e0 RCX: 00007f8538d90847
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffc6aef897c R08: 0000000000000000 R09: 00007ffc6aef8687
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000022d
R13: 00000000000927c0 R14: 0000000000000000 R15: 00007ffc6aef89d0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g141649 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=156923
rcu: rcu_preempt kthread starved for 10502 jiffies! g141649 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:27000 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
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: 23601 Comm: syz.3.4724 Not tainted 6.16.0-rc2-syzkaller-00278-g3f75bfff44be #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:taprio_set_budgets+0x21/0x3b0 net/sched/sch_taprio.c:659
Code: 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 38 49 89 d7 49 89 f6 48 89 fb 48 bd 00 00 00 00 00 fc ff df ba 68 41 f8 49 89 dd 4c 8d 63 08 4c 89 e0 48 c1 e8 03 80 3c 28
RSP: 0018:ffffc90000007c00 EFLAGS: 00000086
RAX: 1ffff1100b7fe6aa RBX: ffff8880114572c0 RCX: dffffc0000000000
RDX: ffff88805bff3400 RSI: ffff88805a482c00 RDI: ffff8880114572c0
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f7c R12: ffff888011457340
R13: ffff888011457000 R14: ffff88805a482c00 R15: ffff88805bff3400
FS: 00007f24690196c0(0000) GS:ffff888125c83000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000066d86000 CR4: 00000000003526f0
DR0: 000000000000634b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
advance_sched+0x963/0xc90 net/sched/sch_taprio.c:977
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x7f7/0xc40 kernel/printk/printk.c:3227
Code: 48 21 c3 0f 85 e9 01 00 00 e8 05 24 1f 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 f6 23 1f 00 eb 06 e8 ef 23 1f 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 3a 77 80 00 48 8b 1b 48 8b 44 24
RSP: 0018:ffffc9000b58f2a0 EFLAGS: 00000283
RAX: 1ffffffff1d345df RBX: ffffffff8e9a2ef8 RCX: 0000000000080000
RDX: ffffc9001f600000 RSI: 0000000000001ae9 RDI: 0000000000001aea
RBP: ffffc9000b58f3f0 R08: ffffffff8f9fe2f7 R09: 1ffffffff1f3fc5e
R10: dffffc0000000000 R11: fffffbfff1f3fc5f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e9a2ea0
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xc4/0x270 kernel/printk/printk.c:3325
vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450
_printk+0xcf/0x120 kernel/printk/printk.c:2475
set_target_v1_checkentry+0x3ea/0x500 net/netfilter/xt_set.c:324
xt_check_target+0x3c0/0xa90 net/netfilter/x_tables.c:1038
check_target net/ipv6/netfilter/ip6_tables.c:528 [inline]
find_check_entry net/ipv6/netfilter/ip6_tables.c:571 [inline]
translate_table+0x186b/0x2040 net/ipv6/netfilter/ip6_tables.c:733
do_replace net/ipv6/netfilter/ip6_tables.c:1154 [inline]
do_ip6t_set_ctl+0x970/0xce0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x257/0x3e0 net/socket.c:2296
__sys_setsockopt net/socket.c:2321 [inline]
__do_sys_setsockopt net/socket.c:2327 [inline]
__se_sys_setsockopt net/socket.c:2324 [inline]
__x64_sys_setsockopt+0x18b/0x220 net/socket.c:2324
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f246818e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2469019038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f24683b6080 RCX: 00007f246818e929
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 000000000000000b
RBP: 00007f2468210b39 R08: 00000000000003e8 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f24683b6080 R15: 00007ffedea13118