rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5956/2:b..l P5957/1:b..l P5733/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=20065, q=1658591 ncpus=2)
task:syz-executor state:R running task stack:20992 pid:5733 tgid:5733 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6929
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:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:217
Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 c0 d6 03 00 65 8b 15 90 17 6f 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc90005177a88 EFLAGS: 00000202
RAX: ffffffff8bb3ca3d RBX: 0000000000000001 RCX: ffff88802b8e0000
RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8bb3ca34 R09: ffffffff8bb3c8ab
R10: 0000000000000004 R11: ffff88802b8e0000 R12: ffff88806285b608
R13: 0000000000000004 R14: ffff88802fce3e08 R15: 0000000000000004
mt_slot lib/maple_tree.c:788 [inline]
mtree_range_walk+0x57d/0x8e0 lib/maple_tree.c:2792
mas_state_walk lib/maple_tree.c:3678 [inline]
mas_walk lib/maple_tree.c:4906 [inline]
mas_find_setup lib/maple_tree.c:6021 [inline]
mas_find+0x73d/0xbb0 lib/maple_tree.c:6061
offset_find_next fs/libfs.c:501 [inline]
offset_iterate_dir fs/libfs.c:528 [inline]
offset_readdir+0x5f9/0xa30 fs/libfs.c:578
iterate_dir+0x571/0x800 fs/readdir.c:108
__do_sys_getdents64 fs/readdir.c:407 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392
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: 0033:0x7fe39bfb0093
RSP: 002b:00007fe39c25ec88 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00005555811f85c0 RCX: 00007fe39bfb0093
RDX: 0000000000008000 RSI: 00005555811f85c0 RDI: 0000000000000003
RBP: 00005555811f8594 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 00005555811f8590 R15: 00007fe39c25fe40
task:dhcpcd-run-hook state:R running task stack:23680 pid:5957 tgid:5957 ppid:4893 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6786
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6810
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x18f8/0x22d0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2619
discard_slab mm/slub.c:2678 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3146
put_cpu_partial+0x17c/0x250 mm/slub.c:3221
__slab_free+0x2ea/0x3d0 mm/slub.c:4450
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4086 [inline]
slab_alloc_node mm/slub.c:4135 [inline]
kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142
vm_area_alloc+0x24/0x1d0 kernel/fork.c:471
mmap_region+0xc3a/0x2080 mm/mmap.c:2944
do_mmap+0x8f0/0x1000 mm/mmap.c:1468
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:1514
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: 0033:0x7fd558124b74
RSP: 002b:00007ffcd253a9d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00000fff9a4a753c RCX: 00007fd558124b74
RDX: 0000000000000001 RSI: 0000000000026610 RDI: 0000000000000000
RBP: 00007ffcd253adb0 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000802 R11: 0000000000000246 R12: 00007fd558101fc0
R13: 00007ffcd253ae38 R14: fffffffffffff000 R15: 0000000000000000
task:syz.4.104 state:R running task stack:23280 pid:5956 tgid:5955 ppid:5546 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6786
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6810
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
local_bh_enable include/linux/bottom_half.h:33 [inline]
ip6t_do_table+0x1687/0x18a0 net/ipv6/netfilter/ip6_tables.c:375
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook+0x2c4/0x450 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ip6_xmit+0xece/0x18b0 net/ipv6/ip6_output.c:366
sctp_v6_xmit+0x9f2/0x13f0 net/sctp/ipv6.c:248
sctp_packet_transmit+0x26af/0x2ca0 net/sctp/output.c:653
sctp_outq_flush_transports net/sctp/outqueue.c:1173 [inline]
sctp_outq_flush+0x142a/0x3e20 net/sctp/outqueue.c:1221
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1326 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
sctp_do_sm+0x1b1d/0x60c0 net/sctp/sm_sideeffect.c:1169
sctp_primitive_ABORT+0x98/0xc0 net/sctp/primitive.c:104
sctp_close+0x2b7/0x920 net/sctp/socket.c:1526
inet_release+0x17d/0x200 net/ipv4/af_inet.c:437
__sock_release net/socket.c:659 [inline]
sock_close+0xbc/0x240 net/socket.c:1427
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x27f0 kernel/exit.c:882
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd5f17def9
RSP: 002b:00007fbd60033038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000000001 RBX: 00007fbd5f335f80 RCX: 00007fbd5f17def9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007fbd5f1f0b76 R08: 0000000020000480 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbd5f335f80 R15: 00007fbd5f45fa28
rcu: rcu_preempt kthread starved for 10597 jiffies! g20065 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:25168 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1893/0x4b50 kernel/sched/core.c:6607
__schedule_loop kernel/sched/core.c:6684 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6699
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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5270 Comm: kworker/1:3 Not tainted 6.11.0-syzkaller-07462-g1868f9d0260e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0x9a/0x360 kernel/locking/lockdep.c:4700
Code: 28 84 c0 0f 85 3a 02 00 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 f7 24 94 be 08 00 00 00 e8 c6 b3 8b 00 <48> 0f a3 1d ee 59 b4 12 73 10 48 69 c3 c8 00 00 00 48 8d 98 80 76
RSP: 0018:ffffc90000a17a28 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 0000000000000022 RCX: ffffffff81709d8a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9424f780
RBP: 0000000000000009 R08: ffffffff9424f787 R09: 1ffffffff2849ef0
R10: dffffc0000000000 R11: fffffbfff2849ef1 R12: ffff888032460000
R13: dffffc0000000000 R14: 0000000000000200 R15: ffff888032460bd0
FS: 0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555812005c8 CR3: 000000000e734000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4643 [inline]
__lock_acquire+0xc35/0x2050 kernel/locking/lockdep.c:5153
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
ip_route_output_key_hash+0x100/0x2b0 net/ipv4/route.c:2623
__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