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): P4995/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=97913, q=783 ncpus=1)
task:udevd state:R running task stack:22408 pid:4995 tgid:4995 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:trace_lock_release include/trace/events/lock.h:68 [inline]
RIP: 0010:lock_release+0x4d/0x3c0 kernel/locking/lockdep.c:5954
Code: 24 28 0f 1f 44 00 00 65 8b 05 57 18 3d 13 83 f8 08 0f 83 60 02 00 00 89 c0 48 0f a3 05 c4 b7 19 10 73 0d e8 35 24 09 00 84 c0 <0f> 84 9e 02 00 00 83 3d e6 e6 19 10 00 0f 84 26 02 00 00 65 8b 05
RSP: 0018:ffffc90010187448 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffffffff8c8ea260 RDI: ffffffff8c8ea220
RBP: ffff88801fce9430 R08: ffff88801fce9437 R09: 1ffff11003f9d286
R10: dffffc0000000000 R11: ffffed1003f9d287 R12: ffff88801fce9474
R13: ffffffff824ad877 R14: ffffffff9015a260 R15: 0000000000000008
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
__update_page_owner_free_handle+0x3df/0x410 mm/page_owner.c:313
__reset_page_owner+0xd2/0x2a0 mm/page_owner.c:339
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__do_kmalloc_node mm/slub.c:5530 [inline]
__kmalloc_noprof+0x302/0x710 mm/slub.c:5556
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x2ad/0x570 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x5fd/0x640 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
security_inode_getattr+0x12b/0x310 security/security.c:1917
vfs_getattr+0x23/0x70 fs/stat.c:263
vfs_statx_path+0x2b/0x230 fs/stat.c:303
vfs_statx+0x12e/0x200 fs/stat.c:360
vfs_fstatat+0x11b/0x170 fs/stat.c:377
__do_sys_newfstatat fs/stat.c:542 [inline]
__se_sys_newfstatat+0x118/0x3a0 fs/stat.c:536
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c8cd11b0a
RSP: 002b:00007ffe06ccab08 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055d49ebdf408 RCX: 00007f5c8cd11b0a
RDX: 00007ffe06ccab10 RSI: 000055d49ebcdef3 RDI: 00000000ffffff9c
RBP: 000055d4d1abe148 R08: 00063489548db180 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe06ccab10 R14: 0000000000000000 R15: 00063489548db180
rcu: rcu_preempt kthread starved for 10502 jiffies! g97913 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:R running task stack:27496 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 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:
CPU: 0 UID: 0 PID: 3222 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Workqueue: bat_events batadv_dat_purge
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 30 7e 61 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 32 48 3d 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 fa 28 6c ff cc 48 8d 3d 07 22 1d
RSP: 0018:ffffc90000007270 EFLAGS: 00000292
RAX: 079d240f4a867b00 RBX: 0000000000000001 RCX: 8000000000000301
RDX: 00000000f7c63eef RSI: ffffffff8e9349f9 RDI: ffffffff8c8ea280
RBP: ffff888033aa9f40 R08: ffffffff89c7038c R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000000e98 R12: ffff8880b823a0d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff88812340a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3287cb670 CR3: 0000000079d65000 CR4: 0000000000350ef0
Call Trace:
local_lock_acquire include/linux/local_lock_internal.h:46 [inline]
napi_skb_cache_get+0x184/0x7e0 net/core/skbuff.c:290
__alloc_skb+0x1a1/0x7a0 net/core/skbuff.c:699
alloc_skb include/linux/skbuff.h:1390 [inline]
synproxy_send_client_synack+0x175/0xde0 net/netfilter/nf_synproxy_core.c:463
nft_synproxy_eval_v4+0x362/0x4e0 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x389/0x5d0 net/netfilter/nft_synproxy.c:142
expr_call_ops_eval net/netfilter/nf_tables_core.c:232 [inline]
nft_do_chain+0x132b/0x1b10 net/netfilter/nf_tables_core.c:285
nft_do_chain_ipv4+0x195/0x290 net/netfilter/nft_chain_filter.c:24
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6435 [inline]
__netif_receive_skb net/core/dev.c:6548 [inline]
process_backlog+0xa6b/0x18b0 net/core/dev.c:6899
__napi_poll+0xaa/0x330 net/core/dev.c:7985
napi_poll net/core/dev.c:8048 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8205
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
__batadv_dat_purge net/batman-adv/distributed-arp-table.c:252 [inline]
batadv_dat_purge+0x2d7/0x3c0 net/batman-adv/distributed-arp-table.c:271
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
rescuer_thread+0x84a/0x12a0 kernel/workqueue.c:3803
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245