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): P11352/1:b..l P1159/1:b..l P7261/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=70081, q=445 ncpus=1)
task:kworker/u8:18 state:R running task stack:23112 pid:7261 tgid:7261 ppid:2 task_flags:0x24248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5526 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7277
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7599
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 4f 20 a5 12 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 5e dc 5d 0f 0f 82 c9 02 00 00 8b 35 fe 0d 5e 0f 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 ed 1f a5 12 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc9000527ec98 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e36563d RDI: ffffffff8c622e80
RBP: ffffffff8edec4a0 R08: 000000000e10e75b R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:183
__reset_page_owner+0x84/0x190 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_noprof+0x269/0x6a0 mm/slub.c:5010
ext4_init_io_end+0x24/0x170 fs/ext4/page-io.c:302
ext4_do_writepages+0x992/0x3e80 fs/ext4/inode.c:2879
ext4_writepages+0x34a/0x750 fs/ext4/inode.c:3032
do_writepages+0x278/0x600 mm/page-writeback.c:2560
__writeback_single_inode+0x164/0x1560 fs/fs-writeback.c:1788
writeback_sb_inodes+0x766/0x1c50 fs/fs-writeback.c:2099
__writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2175
wb_writeback+0x6f6/0xb50 fs/fs-writeback.c:2286
wb_check_old_data_flush fs/fs-writeback.c:2390 [inline]
wb_do_writeback fs/fs-writeback.c:2469 [inline]
wb_workfn+0x93f/0xc80 fs/fs-writeback.c:2497
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:10 state:R running task stack:24184 pid:1159 tgid:1159 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: krds_cp_wq#2/0 rds_connect_worker
Call Trace:
context_switch kernel/sched/core.c:5526 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7277
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7599
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 4f 20 a5 12 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 5e dc 5d 0f 0f 82 c9 02 00 00 8b 35 fe 0d 5e 0f 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 ed 1f a5 12 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc90005077378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e36563d RDI: ffffffff8c622e80
RBP: ffffffff8edec4a0 R08: 0000000039c452e0 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:183
__reset_page_owner+0x84/0x190 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
__kmalloc_cache_noprof+0x278/0x6d0 mm/slub.c:5559
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270
__netns_tracker_alloc include/net/net_namespace.h:370 [inline]
sk_alloc+0xcfc/0xe80 net/core/sock.c:2328
inet_create net/ipv4/af_inet.c:333 [inline]
inet_create+0x3a0/0x1060 net/ipv4/af_inet.c:259
__sock_create+0x339/0x860 net/socket.c:1676
rds_tcp_conn_path_connect+0x304/0xaa0 net/rds/tcp_connect.c:125
rds_connect_worker+0x1b4/0x2d0 net/rds/threads.c:176
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.1.1473 state:R running task stack:27256 pid:11352 tgid:11350 ppid:5600 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5526 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7277
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7599
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5968
Code: ff 65 0f c1 05 1b 60 a5 12 83 f8 01 0f 85 27 01 00 00 9c 58 f6 c4 02 0f 85 12 01 00 00 41 f7 c6 00 02 00 00 0f 85 c8 00 00 00 <48> 8b 44 24 10 65 48 2b 05 1d 19 a5 12 0f 85 4d 01 00 00 48 83 c4
RSP: 0018:ffffc90005857348 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8edec4a0 RCX: ffffc90005857354
RDX: 0000000000000000 RSI: ffffffff8e36563d RDI: ffffffff8c622e80
RBP: ffffffff81b9a54e R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000089272 R12: ffff88807bfb8000
R13: ffffc90005857400 R14: 0000000000000202 R15: 0000000000000001
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:183
__reset_page_owner+0x84/0x190 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
free_pages_prepare+0x586/0xe00 mm/page_alloc.c:1463
__free_contig_range_common+0x14f/0x250 mm/page_alloc.c:7072
__free_contig_range mm/page_alloc.c:7117 [inline]
free_pages_bulk+0x12a/0x200 mm/page_alloc.c:5322
vm_area_free_pages+0xb2/0x2a0 mm/vmalloc.c:3461
vfree mm/vmalloc.c:3510 [inline]
vfree+0xf7/0x6d0 mm/vmalloc.c:3484
htable_put net/netfilter/xt_hashlimit.c:428 [inline]
hashlimit_mt_destroy+0x7e/0xa0 net/netfilter/xt_hashlimit.c:995
cleanup_match net/ipv6/netfilter/ip6_tables.c:477 [inline]
find_check_entry.isra.0+0x4ca/0xa00 net/ipv6/netfilter/ip6_tables.c:581
translate_table+0xcb9/0x1770 net/ipv6/netfilter/ip6_tables.c:738
do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline]
do_ip6t_set_ctl+0x689/0xd00 net/ipv6/netfilter/ip6_tables.c:1648
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:970
rawv6_setsockopt+0xee/0x5a0 net/ipv6/raw.c:1048
do_sock_setsockopt+0xf3/0x1d0 net/socket.c:2397
__sys_setsockopt+0x195/0x220 net/socket.c:2422
__do_sys_setsockopt net/socket.c:2428 [inline]
__se_sys_setsockopt net/socket.c:2425 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2425
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fde83f9e159
RSP: 002b:00007fde84dee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fde84226090 RCX: 00007fde83f9e159
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000007
RBP: 00007fde8403503b R08: 00000000000005b8 R09: 0000000000000000
R10: 0000200000000580 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde84226128 R14: 00007fde84226090 R15: 00007ffd0ac0c118
rcu: rcu_preempt kthread starved for 572 jiffies! g70081 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:28840 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5526 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7277
__schedule_loop kernel/sched/core.c:7354 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7369
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 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: 3228 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5968
Code: ff 65 0f c1 05 1b 60 a5 12 83 f8 01 0f 85 27 01 00 00 9c 58 f6 c4 02 0f 85 12 01 00 00 41 f7 c6 00 02 00 00 0f 85 c8 00 00 00 <48> 8b 44 24 10 65 48 2b 05 1d 19 a5 12 0f 85 4d 01 00 00 48 83 c4
RSP: 0018:ffffc900000076f8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8edec4a0 RCX: ffffc90000007704
RDX: 0000000000000101 RSI: ffffffff8e36563d RDI: ffffffff8c622e80
RBP: ffffffff81b9a54e R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 00000000000a9f90 R12: ffff88802b3f4b00
R13: ffffc900000077b0 R14: 0000000000000202 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff888123b59000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96be400020 CR3: 0000000039c9f000 CR4: 00000000003526f0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_node_noprof+0x282/0x6e0 mm/slub.c:5068
__alloc_skb+0x140/0x710 net/core/skbuff.c:704
alloc_skb include/linux/skbuff.h:1384 [inline]
bcm_can_tx+0x1c1/0x9e0 net/can/bcm.c:350
bcm_tx_timeout_handler+0x522/0x5d0 net/can/bcm.c:546
__run_hrtimer kernel/time/hrtimer.c:2074 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2131
hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2148
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
do_softirq kernel/softirq.c:546 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:533
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2390 [inline]
batadv_tt_purge+0x25d/0xbd0 net/batman-adv/translation-table.c:3754
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
rescuer_thread+0x918/0x14e0 kernel/workqueue.c:3703
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245