rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2948/1:b..l P11618/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=58397, q=427983 ncpus=2)
task:syz.1.2129 state:R running task stack:22288 pid:11618 tgid:11606 ppid:10763 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6997
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:folio_mapcount+0x1/0x1e0 include/linux/mm.h:1240
Code: ff ff e8 62 1c aa ff e9 16 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 28 1c aa
RSP: 0018:ffffc9000323e728 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 1ffffd40003d24bb RCX: ffff88802590da00
RDX: ffffc900104a9000 RSI: 0000000000000001 RDI: ffffea0001e925c0
RBP: 0000000000000001 R08: ffffffff81ea814e R09: 1ffffffff284d0f8
R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: ffff888059f95cc1
R13: ffffea0001e925c0 R14: ffffea0001e925d8 R15: dffffc0000000000
folio_mapped include/linux/mm.h:1260 [inline]
folio_lock_anon_vma_read+0x120/0x670 mm/rmap.c:556
rmap_walk_anon_lock mm/rmap.c:2571 [inline]
rmap_walk_anon+0x83/0x8a0 mm/rmap.c:2619
try_to_unmap+0x243/0x2e0
shrink_folio_list+0x21e4/0x8cc0 mm/vmscan.c:1303
reclaim_folio_list mm/vmscan.c:2142 [inline]
reclaim_pages+0x916/0xc60 mm/vmscan.c:2178
madvise_cold_or_pageout_pte_range+0x295a/0x32a0 mm/madvise.c:550
walk_pmd_range mm/pagewalk.c:106 [inline]
walk_pud_range mm/pagewalk.c:178 [inline]
walk_p4d_range mm/pagewalk.c:211 [inline]
walk_pgd_range+0xb81/0x17f0 mm/pagewalk.c:246
__walk_page_range+0x132/0x720 mm/pagewalk.c:348
walk_page_range+0x58f/0x7c0 mm/pagewalk.c:474
madvise_pageout_page_range mm/madvise.c:609 [inline]
madvise_pageout mm/madvise.c:636 [inline]
madvise_vma_behavior mm/madvise.c:1045 [inline]
madvise_walk_vmas mm/madvise.c:1274 [inline]
do_madvise+0x33cc/0x4720 mm/madvise.c:1461
__do_sys_madvise mm/madvise.c:1477 [inline]
__se_sys_madvise mm/madvise.c:1475 [inline]
__x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1475
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7effff77def9
RSP: 002b:00007f0000492038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007effff936058 RCX: 00007effff77def9
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007effff7f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007effff936058 R15: 00007effffa5fa28
task:kworker/u8:8 state:R running task stack:21264 pid:2948 tgid:2948 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6997
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5826
Code: 2b 00 74 08 4c 89 f7 e8 fa 4a 8e 00 f6 44 24 61 02 0f 85 85 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: 0018:ffffc900099679e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200132cf48 RCX: 725a5e54cce92900
RDX: dffffc0000000000 RSI: ffffffff8c0adbc0 RDI: ffffffff8c6100a0
RBP: ffffc90009967b40 R08: ffffffff942687c7 R09: 1ffffffff284d0f8
R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: 1ffff9200132cf44
R13: dffffc0000000000 R14: ffffc90009967a40 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10541 jiffies! g58397 f0x2 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:24408 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5299 Comm: kworker/1:6 Not tainted 6.11.0-syzkaller-10622-gaa486552a110 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:fib_table_lookup+0x21c/0x1870 net/ipv4/fib_trie.c:1489
Code: 8d 7d 05 4d 89 fc 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 0f 85 ef 01 00 00 45 0f b6 2f bf 40 00 00 00 <44> 89 ee e8 7c 76 57 f7 41 83 fd 3f 0f 87 5f 02 00 00 e8 6d 73 57
RSP: 0018:ffffc90000a17a60 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000040
RBP: ffffc90000a17bc8 R08: ffffffff8a3d416f R09: 1ffffffff284d0f8
R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: 1ffff1100e0aa9e4
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888070554f25
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d01cff8 CR3: 000000000e734000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fib_lookup+0x1c0/0x450 include/net/ip_fib.h:388
ip_route_output_key_hash_rcu+0x284/0x2390 net/ipv4/route.c:2734
ip_route_output_key_hash+0x193/0x2b0 net/ipv4/route.c:2624
__ip_route_output_key include/net/route.h:141 [inline]
ip_route_output_flow+0x29/0x140 net/ipv4/route.c:2852
ip_route_output_key include/net/route.h:151 [inline]
ip_route_me_harder+0x80d/0x1300 net/ipv4/netfilter.c:53
synproxy_send_tcp+0x356/0x6c0 net/netfilter/nf_synproxy_core.c:431
synproxy_send_client_synack+0x8b8/0xf30 net/netfilter/nf_synproxy_core.c:484
nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288
nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5662 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
process_backlog+0x662/0x15b0 net/core/dev.c:6107
__napi_poll+0xcb/0x490 net/core/dev.c:6771
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6962
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
do_softirq+0x11b/0x1e0 kernel/softirq.c:455
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
spin_unlock_bh include/linux/spinlock.h:396 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x75d/0xaa0 drivers/net/netdevsim/dev.c:850
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244