sched: DL replenish lagged too much
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5816/1:b..l P5200/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=40729, q=707 ncpus=2)
task:udevd state:R running task stack:22728 pid:5200 tgid:5200 ppid:1 task_flags:0x400140 flags:0x00080800
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x14bc/0x5030 kernel/sched/core.c:6864
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7191
irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x11ac/0x2390 arch/x86/kernel/unwind_orc.c:-1
Code: c0 0f 85 a1 0d 00 00 0f b7 32 c1 ee 04 83 e6 0f 83 fe 04 0f 84 c7 05 00 00 83 fe 01 0f 84 78 05 00 00 85 f6 0f 85 5a 07 00 00 <48> 8b 44 24 38 80 3c 28 00 74 08 4c 89 ef e8 21 14 b4 00 49 8b 7d
RSP: 0018:ffffc90002fe72b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90002fe73c0 RCX: 0000000000000000
RDX: ffffffff901a6208 RSI: 0000000000000000 RDI: ffffc90002fe73e8
RBP: dffffc0000000000 R08: ffffc90002fe73e7 R09: 0000000000000000
R10: ffffc90002fe73d8 R11: fffff520005fce7d R12: ffffc90002fe7838
R13: ffffc90002fe73d8 R14: ffffc90002fe7388 R15: 1ffffffff2034c41
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
discard_slab mm/slub.c:3346 [inline]
__put_partials+0x146/0x170 mm/slub.c:3886
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3961
__slab_free+0x288/0x2a0 mm/slub.c:5947
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
__do_kmalloc_node mm/slub.c:5651 [inline]
__kmalloc_noprof+0x3cf/0x800 mm/slub.c:5664
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x28b/0x550 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x58d/0x5d0 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x213/0x4b0 security/tomoyo/file.c:822
security_inode_getattr+0x12f/0x330 security/security.c:1869
vfs_getattr fs/stat.c:259 [inline]
vfs_statx_path fs/stat.c:299 [inline]
vfs_statx+0x18e/0x550 fs/stat.c:356
vfs_fstatat+0x118/0x170 fs/stat.c:375
__do_sys_newfstatat fs/stat.c:542 [inline]
__se_sys_newfstatat fs/stat.c:536 [inline]
__x64_sys_newfstatat+0x116/0x190 fs/stat.c:536
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc20fd11b0a
RSP: 002b:00007fff64139288 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000563cbd343400 RCX: 00007fc20fd11b0a
RDX: 00007fff64139290 RSI: 0000563cbd331296 RDI: 00000000ffffff9c
RBP: 0000563ce24e9148 R08: 000000001d58aa01 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff64139290 R14: 0000000000000000 R15: 0000000000000000
task:syz-executor state:R running task stack:21304 pid:5816 tgid:5816 ppid:5815 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x14bc/0x5030 kernel/sched/core.c:6864
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7191
irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
RIP: 0010:memset_orig+0x72/0xb0 arch/x86/lib/memset_64.S:91
Code: 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1 e9 03 66 0f 1f 44 00 00 ff c9 <48> 89 07 48 8d 7f 08 75 f5 83 e2 07 74 0a ff ca 88 07 48 8d 7f 01
RSP: 0018:ffffc90003f5f710 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90003f5f820 RCX: 0000000000000001
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90003f5f838
RBP: dffffc0000000000 R08: ffffc90003f5f847 R09: 0000000000000000
R10: ffffc90003f5f838 R11: fffff520007ebf09 R12: ffffc90003f5fe00
R13: ffffc90003f5f838 R14: ffffc90003f5f7e8 R15: ffffc90003f5f830
unwind_next_frame+0xc98/0x2390 arch/x86/kernel/unwind_orc.c:592
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
discard_slab mm/slub.c:3346 [inline]
__put_partials+0x146/0x170 mm/slub.c:3886
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3961
__slab_free+0x288/0x2a0 mm/slub.c:5947
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
__kmalloc_cache_noprof+0x37c/0x700 mm/slub.c:5766
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
alloc_pipe_info+0xe9/0x4d0 fs/pipe.c:800
get_pipe_inode fs/pipe.c:896 [inline]
create_pipe_files+0x8a/0x7e0 fs/pipe.c:928
__do_pipe_flags+0x46/0x1f0 fs/pipe.c:990
do_pipe2+0x9c/0x170 fs/pipe.c:1038
__do_sys_pipe2 fs/pipe.c:1056 [inline]
__se_sys_pipe2 fs/pipe.c:1054 [inline]
__x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1054
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5bc1d8e469
RSP: 002b:00007ffc372e24a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 0000555567281af0 RCX: 00007f5bc1d8e469
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffc372e24b8
RBP: 0000555567281af0 R08: 0000000000000007 R09: 000055556728b830
R10: e299ce3565d481b5 R11: 0000000000000246 R12: 00007ffc372e28d0
R13: 0000555567288990 R14: 00005555672864e0 R15: 00007ffc372e25e0
rcu: rcu_preempt kthread starved for 8302 jiffies! g40729 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:26472 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x14bc/0x5030 kernel/sched/core.c:6864
__schedule_loop kernel/sched/core.c:6946 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6961
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__unwind_start+0x514/0x760 arch/x86/kernel/unwind_orc.c:-1
Code: b6 04 30 84 c0 0f 85 19 02 00 00 83 3b 00 0f 84 ce fb ff ff 4c 8d 7b 08 4c 8d 6b 10 48 8b 44 24 10 48 83 c0 08 48 89 44 24 20 <4c> 89 fd 48 c1 ed 03 4d 89 ee 49 c1 ee 03 80 7c 35 00 00 74 12 4c
RSP: 0018:ffffc90000a076a8 EFLAGS: 00000282
RAX: ffffc90000a07798 RBX: ffffc90000a07708 RCX: 0000000000000002
RDX: 0000000000000004 RSI: dffffc0000000000 RDI: ffffffff8bbf8100
RBP: ffffc90000a07701 R08: ffffc90000a07701 R09: 0000000000000000
R10: ffffc90000a07708 R11: fffff52000140eed R12: ffffc90000a076a8
R13: ffffc90000a07718 R14: ffffc90000a07730 R15: ffffc90000a07710
FS: 0000000000000000(0000) GS:ffff888125fba000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002f000 CR3: 000000007e3c2000 CR4: 00000000003526f0
Call Trace:
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:165
__set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846
prep_new_page mm/page_alloc.c:1854 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab+0x86/0x3b0 mm/slub.c:3248
new_slab mm/slub.c:3302 [inline]
___slab_alloc+0xf56/0x1990 mm/slub.c:4651
__slab_alloc+0x65/0x100 mm/slub.c:4774
__slab_alloc_node mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:5246 [inline]
kmem_cache_alloc_node_noprof+0x4ce/0x710 mm/slub.c:5310
__alloc_skb+0x255/0x430 net/core/skbuff.c:679
alloc_skb include/linux/skbuff.h:1383 [inline]
synproxy_send_client_synack_ipv6+0x169/0xca0 net/netfilter/nf_synproxy_core.c:873
nft_synproxy_eval_v6+0x36e/0x560 net/netfilter/nft_synproxy.c:90
nft_synproxy_do_eval+0x3d7/0x570 net/netfilter/nft_synproxy.c:145
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x40c/0x1920 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x25d/0x340 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:316
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:500
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6130 [inline]
__netif_receive_skb+0xd3/0x380 net/core/dev.c:6243
process_backlog+0x622/0x1530 net/core/dev.c:6595
__napi_poll+0xae/0x320 net/core/dev.c:7659
napi_poll net/core/dev.c:7722 [inline]
net_rx_action+0x672/0xe50 net/core/dev.c:7874
handle_softirqs+0x27d/0x880 kernel/softirq.c:626
__do_softirq kernel/softirq.c:660 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:727
irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 70 0c 00 f3 0f 1e fa fb f4 c8 f2 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 98e15e06a69e1000 RBX: ffffffff8197acb7 RCX: 98e15e06a69e1000
RDX: 0000000000000001 RSI: ffffffff8d78f71d RDI: ffffffff8bbf81e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8f7deb70
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039deb70
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e7/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x147