rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6077/1:b..l P4346/1:b..l P46/1:b..l
(detected by 1, t=10502 jiffies, g=23749, q=16 ncpus=2)
task:kworker/u4:3 state:R running task stack:24456 pid:46 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x20f/0x490 kernel/locking/lockdep.c:5666
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b
RSP: 0018:ffffc90000b77920 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 9ecbfc50fbb56c00
RDX: 0000000000000000 RSI: ffffffff8a8c15e0 RDI: ffffffff8adef320
RBP: ffffc90000b77a28 R08: dffffc0000000000 R09: fffffbfff215ba49
R10: fffffbfff215ba49 R11: 1ffffffff215ba48 R12: 0000000000000000
R13: 1ffff9200016ef30 R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:825 [inline]
batadv_iv_ogm_schedule+0x413/0xe90 net/batman-adv/bat_iv_ogm.c:868
batadv_iv_send_outstanding_bat_ogm_packet+0x72d/0x840 net/batman-adv/bat_iv_ogm.c:1712
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:kworker/0:5 state:R running task stack:21248 pid:4346 ppid:2 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:seqcount_lockdep_reader_access+0x17b/0x1c0 include/linux/seqlock.h:105
Code: f9 4d 85 e4 75 16 e8 f4 34 20 f9 eb 15 e8 ed 34 20 f9 e8 08 90 b5 01 4d 85 e4 74 ea e8 de 34 20 f9 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 66 43 c7 44 3e 09 00 00 43 c6 44 3e 0b 00
RSP: 0018:ffffc90004687a20 EFLAGS: 00000293
RAX: ffffffff88609202 RBX: 0000000000000000 RCX: ffff888027730000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004687ad0 R08: dffffc0000000000 R09: fffffbfff215ba5b
R10: fffffbfff215ba5b R11: 1ffffffff215ba5a R12: 0000000000000200
R13: ffff888027d09548 R14: 1ffff920008d0f44 R15: dffffc0000000000
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:354 [inline]
gc_worker+0x30c/0x13d0 net/netfilter/nf_conntrack_core.c:1517
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:syz.3.455 state:R running task stack:27584 pid:6077 ppid:4269 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 2e 0f 1f 84 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 87 9e 0c 48 89 de 5b e9 87 53 4f 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d 54 a8 81 7e 65 8b 15 55 a8 81 7e 81 e2 00
RSP: 0018:ffffc900030c75b8 EFLAGS: 00000293
RAX: ffffffff8a03e3a8 RBX: ffff88807c7b6808 RCX: 0000000000000000
RDX: ffff88802c44d940 RSI: 0000000000000001 RDI: 0000000000000003
RBP: ffffc900030c7790 R08: ffff88802c44d940 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: 000000110c22ffff
R13: ffff88807c7b6800 R14: 0000000000000001 R15: 0000000000000000
ma_slots lib/maple_tree.c:793 [inline]
mas_get_slot lib/maple_tree.c:6678 [inline]
mas_validate_gaps lib/maple_tree.c:6976 [inline]
mt_validate+0x2b68/0x4c90 lib/maple_tree.c:7244
validate_mm_mt+0xcd/0x420 mm/mmap.c:294
validate_mm+0xcc/0x2b0 mm/mmap.c:331
vma_expand+0x826/0x880 mm/mmap.c:603
__mmap_region mm/mmap.c:2736 [inline]
mmap_region+0xd5d/0x1d30 mm/mmap.c:2912
do_mmap+0x894/0xf30 mm/mmap.c:1432
vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:520
ksys_mmap_pgoff+0x516/0x6f0 mm/mmap.c:1478
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9b3bb8e9e3
RSP: 002b:00007ffce70b7e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000400000 RCX: 00007f9b3bb8e9e3
RDX: 0000000000000003 RSI: 00000000003c0000 RDI: 0000001b2e460000
RBP: 0000001b2e460000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000064
R13: 00000000000927c0 R14: 00000000000411a6 R15: 00007ffce70b8170
rcu: rcu_preempt kthread starved for 10588 jiffies! g23749 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:27840 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 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: 0 Comm: swapper/1 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:742
Code: 48 89 df e8 c7 c9 b0 f7 e9 4c ff ff ff e8 ed 07 f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d 67 85 66 00 fb f4 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48
RSP: 0018:ffffc90000177de8 EFLAGS: 000002c6
RAX: 813511a1c8f14100 RBX: ffffffff8a201e87 RCX: 813511a1c8f14100
RDX: 0000000000000001 RSI: ffffffff8a8c0460 RDI: ffffffff8adef320
RBP: ffffc90000177f20 R08: dffffc0000000000 R09: ffffed10171e6af6
R10: ffffed10171e6af6 R11: 1ffff110171e6af5 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888017739dc0 R15: 1ffffffff1c3e9b6
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b3ba5efb0 CR3: 000000002fb36000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
default_idle_call+0x84/0xc0 kernel/sched/idle.c:109
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x1fc/0x570 kernel/sched/idle.c:303
cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401
start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
secondary_startup_64_no_verify+0xcf/0xdb