syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6293/1:b..l P12618/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=48609, q=503 ncpus=2)
task:syz-executor.2  state:R  running task     stack:28160 pid:12618 tgid:12618 ppid:5106   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:task_css.constprop.0+0x50/0x130 include/linux/cgroup.h:434
Code: 00 48 8b ab 38 13 00 00 e8 1d f7 97 08 85 c0 75 26 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 c3 00 00 00 48 8b 45 20 5b 5d c3 e8 2e 68 8a ff 85 c0 75 d1
RSP: 0000:ffffc90003967b58 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88802b5d3b80 RCX: 0000000000000001
RDX: 1ffff110295e6304 RSI: ffffffff8accbfe0 RDI: ffff88814af31820
RBP: ffff88814af31800 R08: 0000000000000000 R09: fffffbfff23dedd8
R10: ffffffff91ef6ec7 R11: dffffc0000000000 R12: 0000000000440dc0
R13: ffff88802b5d3b80 R14: ffffea0000802c40 R15: ffffc90003967c00
 mem_cgroup_from_task mm/memcontrol.c:1009 [inline]
 get_obj_cgroup_from_current mm/memcontrol.c:3029 [inline]
 __memcg_kmem_charge_page+0x137/0x3d0 mm/memcontrol.c:3129
 __alloc_pages+0x1fc/0x4a0 mm/page_alloc.c:4443
 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2303
 pagetable_alloc include/linux/mm.h:2821 [inline]
 __pte_alloc_one include/asm-generic/pgalloc.h:68 [inline]
 pte_alloc_one+0x20/0x370 arch/x86/mm/pgtable.c:33
 __do_fault+0x433/0x600 mm/memory.c:4202
 do_shared_fault mm/memory.c:4638 [inline]
 do_fault mm/memory.c:4712 [inline]
 do_pte_missing mm/memory.c:3672 [inline]
 handle_pte_fault mm/memory.c:4981 [inline]
 __handle_mm_fault+0x2594/0x3e10 mm/memory.c:5122
 handle_mm_fault+0x478/0xa00 mm/memory.c:5287
 do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f96b7c27226
RSP: 002b:00007ffe052fff78 EFLAGS: 00010287
RAX: 0000001b31a20000 RBX: 0000000000000003 RCX: 0000001b31a20000
RDX: 0000001b31a20004 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000001b31e20000 R09: 0000000000040000
R10: 0000000000000011 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
task:kworker/u4:11   state:R  running task     stack:26000 pid:6293  tgid:6293  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721
Code: c1 05 8d 7f 99 7e 83 f8 01 0f 85 b0 02 00 00 9c 58 f6 c4 02 0f 85 9b 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90015fe7a98 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92002bfcf55 RCX: 0000000000000001
RDX: 1ffff11003b1f511 RSI: ffffffff8accbfe0 RDI: ffffffff8b2e7060
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23dedd8
R10: ffffffff91ef6ec7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cfad3a0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 rcu_read_lock include/linux/rcupdate.h:747 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
 batadv_iv_ogm_schedule_buff+0x5ac/0x14f0 net/batman-adv/bat_iv_ogm.c:825
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8c0 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: rcu_preempt kthread starved for 10560 jiffies! g48609 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:28176 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe7/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1626
 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1825
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5163 Comm: kworker/0:6 Not tainted 6.6.0-syzkaller-10102-gff269e2cd5ad #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:202 [inline]
RIP: 0010:unwind_next_frame+0x1b5/0x2390 arch/x86/kernel/unwind_orc.c:494
Code: 66 1c 00 00 31 ff 44 89 ee 4c 8b 63 48 e8 b3 f9 4d 00 45 84 ed 0f 84 c9 02 00 00 e8 75 fe 4d 00 31 ff 4c 89 e6 e8 fb f9 4d 00 <4d> 85 e4 0f 84 f0 0a 00 00 e8 5d fe 4d 00 48 c7 c6 00 00 00 81 4c
RSP: 0018:ffffc90000007210 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000007290 RCX: ffffffff813a87e5
RDX: ffff88806d323b80 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000002 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff89740e9f R11: 0000000100000000 R12: ffffffff89740e9f
R13: 0000000000000000 R14: ffffc90000007350 R15: ffffc900000072c5
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3facadca48 CR3: 000000000cd77000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
 slab_free mm/slub.c:3809 [inline]
 kmem_cache_free+0xf0/0x470 mm/slub.c:3831
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015
 __kfree_skb net/core/skbuff.c:1073 [inline]
 consume_skb net/core/skbuff.c:1288 [inline]
 consume_skb+0xdf/0x170 net/core/skbuff.c:1282
 packet_rcv+0x15d/0x1610 net/packet/af_packet.c:2231
 dev_queue_xmit_nit+0x82e/0xb70 net/core/dev.c:2311
 xmit_one net/core/dev.c:3539 [inline]
 dev_hard_start_xmit+0x59/0x6c0 net/core/dev.c:3559
 __dev_queue_xmit+0x9b4/0x3d10 net/core/dev.c:4344
 dev_queue_xmit include/linux/netdevice.h:3112 [inline]
 can_send+0x77c/0xb40 net/can/af_can.c:276
 can_can_gw_rcv+0x74c/0xab0 net/can/gw.c:561
 deliver net/can/af_can.c:572 [inline]
 can_rcv_filter+0x15e/0x8e0 net/can/af_can.c:599
 can_receive+0x320/0x5c0 net/can/af_can.c:663
 can_rcv+0x1dc/0x270 net/can/af_can.c:687
 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5527
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5641
 process_backlog+0x101/0x6b0 net/core/dev.c:5969
 __napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6531
 napi_poll net/core/dev.c:6600 [inline]
 net_rx_action+0x956/0xe90 net/core/dev.c:6733
 __do_softirq+0x21a/0x968 kernel/softirq.c:553
 do_softirq kernel/softirq.c:454 [inline]
 do_softirq+0xaa/0xe0 kernel/softirq.c:441
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381
 neigh_periodic_work+0x6be/0xc40 net/core/neighbour.c:1010
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>