rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4721/1:b..l P63/1:b..l
(detected by 1, t=10502 jiffies, g=17073, q=22 ncpus=2)
task:kworker/u4:4 state:R running task stack:21568 pid:63 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 0f a7 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0000:ffffc900015a7a80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920002b4f5c RCX: 1ffff920002b4efc
RDX: dffffc0000000000 RSI: ffffffff8b0c13e0 RDI: ffffffff8b5d5e20
RBP: ffffc900015a7be0 R08: dffffc0000000000 R09: fffffbfff20e7445
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920002b4f58
R13: dffffc0000000000 R14: ffffc900015a7ae0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xe8/0x610 net/batman-adv/network-coding.c:719
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:syz.1.284 state:R running task stack:25832 pid:4721 ppid:3638 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6727
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6751
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
filemap_map_pages+0xffa/0x12c0 mm/filemap.c:3470
do_fault_around mm/memory.c:4581 [inline]
do_read_fault mm/memory.c:4607 [inline]
do_fault mm/memory.c:4741 [inline]
handle_pte_fault mm/memory.c:5013 [inline]
__handle_mm_fault mm/memory.c:5155 [inline]
handle_mm_fault+0x33e2/0x5340 mm/memory.c:5276
do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fe86c6587b6
RSP: 002b:00007fffb5a01e40 EFLAGS: 00010246
RAX: 000000110c3f4000 RBX: 00007fe86d445720 RCX: 0000000000000000
RDX: ffffffff83ac8046 RSI: 0000000000003201 RDI: 0000000000000001
RBP: 0000000000000000 R08: 00007fe86c900000 R09: 00007fe86c902000
R10: 0000000083ac804a R11: 0000000000000000 R12: ffffffff83ac8d5c
R13: 00007fe86c916018 R14: 0000000000000008 R15: 00000000000020df
rcu: rcu_preempt kthread starved for 10540 jiffies! g17073 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:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 4750 Comm: syz.4.289 Not tainted 6.1.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: e1 9d f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae 0a bb f6 48 89 df e8 16 48 bc f6 e8 61 d5 e1 f6 fb bf 01 00 00 00 06 d9 ae f6 65 8b 05 a7 e1 52 75 85 c0 74 02 5b c3 e8 54 05 51
RSP: 0018:ffffc900051cfb30 EFLAGS: 00000286
RAX: b129d4fa598e0f00 RBX: ffff88807625b780 RCX: ffffffff91f32103
RDX: dffffc0000000000 RSI: ffffffff8b0c0260 RDI: 0000000000000001
RBP: ffffc900051cfc70 R08: dffffc0000000000 R09: ffffed100ec4b6f1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100ec4b783
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88807625bc18
FS: 00005555573e2500(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32814ff8 CR3: 0000000054c21000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x154b/0x17d0 kernel/signal.c:2873
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f959183a803
Code: 00 00 00 0f 1f 40 00 41 89 fb 44 8d 56 04 4c 8d 0d 12 78 2c 00 89 f0 4c 8d 05 09 58 2c 00 89 c2 81 e2 ff 1f 00 00 49 8b 0c d1 <48> 39 f1 74 28 48 85 c9 74 29 45 38 1c 10 75 23 83 c0 01 44 39 d0
RSP: 002b:00007ffed5463d58 EFLAGS: 00000202
RAX: 0000000081df0770 RBX: 00007f9592645720 RCX: ffffffff81df0770
RDX: 0000000000000770 RSI: ffffffff81df0770 RDI: 0000000000000017
RBP: 00000000000001d9 R08: 00007f9591b00000 R09: 00007f9591b02000
R10: 0000000081df0774 R11: 0000000000000017 R12: ffffffff81df062e
R13: 00007f9591b16018 R14: 0000000000000008 R15: 0000000000000885