rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5182/1:b..l P5486/1:b..l P5193/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=17813, q=471 ncpus=2)
task:udevd state:R running task stack:24464 pid:5193 tgid:5193 ppid:1 task_flags:0x400140 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7087
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0xe64/0x20c0 arch/x86/kernel/unwind_orc.c:672
Code: d0 0f 93 c1 48 39 d5 0f 92 c0 84 c1 74 0b 48 39 5c 24 10 0f 83 28 09 00 00 bf 01 00 00 00 e8 73 bf 1e 00 65 8b 05 74 91 9a 7e <85> c0 0f 84 05 09 00 00 b8 01 00 00 00 e9 ca f1 ff ff ba 28 00 00
RSP: 0018:ffffc90003d3f540 EFLAGS: 00000297
RAX: 0000000080000000 RBX: ffffc90003d3f9a0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffc90003d3f980 RDI: 0000000000000001
RBP: ffffc90003d38000 R08: ffffc90003d3f5e4 R09: ffffffff9103f134
R10: ffffc90003d3f5b0 R11: 0000000000011cdb R12: ffffc90003d3f600
R13: ffffc90003d3f5b0 R14: ffffc90003d3f9a0 R15: ffffc90003d3f998
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:822
security_inode_getattr+0x116/0x290 security/security.c:2377
vfs_getattr fs/stat.c:243 [inline]
vfs_statx_path fs/stat.c:283 [inline]
vfs_statx+0x115/0x210 fs/stat.c:349
vfs_fstatat+0x7b/0xf0 fs/stat.c:368
__do_sys_newfstatat+0xa2/0x130 fs/stat.c:532
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb3c1165f4
RSP: 002b:00007ffdab808368 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000565172b496e0 RCX: 00007ffb3c1165f4
RDX: 00007ffdab808378 RSI: 0000565172b39897 RDI: 00000000ffffff9c
RBP: 000056519b090a48 R08: 00062305ed946d00 R09: 00007ffb3c677000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00062305ed946d00 R15: 0000565172b3ddca
task:dhcpcd state:R running task stack:25104 pid:5486 tgid:5486 ppid:1 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6944
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x1776/0x20c0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_noprof+0x1cd/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
tomoyo_encode2+0x100/0x3e0 security/tomoyo/realpath.c:45
tomoyo_encode+0x29/0x50 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x19d/0x720 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x248/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x9b/0x240 security/security.c:2913
__do_sys_ioctl fs/ioctl.c:900 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6c10b9fd49
RSP: 002b:00007ffc70842198 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000055db2c9188d0 RCX: 00007f6c10b9fd49
RDX: 00007ffc708421a0 RSI: 0000000000008921 RDI: 0000000000000011
RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000036
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc708421a0
R13: 000055dafcc1af88 R14: 000055db2c9188d0 R15: 000055db2c91c5a0
task:klogd state:R running task stack:25232 pid:5182 tgid:5182 ppid:1 task_flags:0x400100 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7087
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x3e5/0x6f0 kernel/locking/lockdep.c:5859
Code: 7e 83 f8 01 0f 85 fe 01 00 00 9c 58 f6 c4 02 0f 85 e9 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 8b 84 24 88
RSP: 0018:ffffc90003c57628 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200078aec7 RCX: ffffc90003c57678
RDX: 1ffff1100f6fa5e4 RSI: ffffffff8b6cfe00 RDI: ffffffff8bd368a0
RBP: ea945c578e12ae0c R08: 0000000000000000 R09: fffffbfff20c4c62
R10: ffffffff90626317 R11: 0000000000000002 R12: 0000000000000001
R13: 0000000000000002 R14: ffff88807b7d2f28 R15: ffff88807b7d2440
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0x43/0xd0 mm/page_ext.c:550
__reset_page_owner+0x28d/0x400 mm/page_owner.c:300
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:537
__alloc_skb+0x164/0x380 net/core/skbuff.c:606
alloc_skb include/linux/skbuff.h:1331 [inline]
alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6522
sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2914
unix_dgram_sendmsg+0x45e/0x1880 net/unix/af_unix.c:2017
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:733 [inline]
__sys_sendto+0x488/0x4f0 net/socket.c:2187
__do_sys_sendto net/socket.c:2194 [inline]
__se_sys_sendto net/socket.c:2190 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2190
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f11a59209b5
RSP: 002b:00007fff57c83638 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11a59209b5
RDX: 00000000000000a1 RSI: 000056336aade630 RDI: 0000000000000003
RBP: 000056336aad52c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f11a5aae212 R14: 00007fff57c83738 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10470 jiffies! g17813 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:26304 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
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: 0 Comm: swapper/1 Not tainted 6.14.0-rc5-syzkaller-00268-g1110ce6a1e34 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:unwind_next_frame+0x15ae/0x20c0 arch/x86/kernel/unwind_orc.c:648
Code: 49 89 c0 49 c1 e8 03 41 0f b6 14 10 49 89 f8 41 83 e0 07 44 38 c6 41 0f 9e c0 40 84 f6 40 0f 95 c6 41 84 f0 0f 85 86 0a 00 00 <83> e0 07 38 c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 c6 0f 85 6f 0a 00
RSP: 0018:ffffc90000a27ae8 EFLAGS: 00000246
RAX: ffffffff9185412b RBX: 0000000000000002 RCX: ffffffff91854128
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9185412a
RBP: ffffc90000a27ba0 R08: 0000000000000001 R09: ffffffff9185412c
R10: ffffc90000a27b58 R11: 0000000000082d9e R12: ffffc90000a27ba8
R13: ffffc90000a27b58 R14: ffffc90000a27fa0 R15: ffffc90000a27f98
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555951b65c8 CR3: 000000000df80000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kmem_cache_free+0x2e2/0x4d0 mm/slub.c:4711
kfree_skbmem+0x1a4/0x1f0 net/core/skbuff.c:1058
__kfree_skb net/core/skbuff.c:1115 [inline]
sk_skb_reason_drop+0x136/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
kfree_skb include/linux/skbuff.h:1280 [inline]
ip6_mc_input+0x7af/0xfd0 net/ipv6/ip6_input.c:591
dst_input include/net/dst.h:469 [inline]
dst_input include/net/dst.h:467 [inline]
ip6_rcv_finish+0x3a2/0x5b0 net/ipv6/ip6_input.c:79
ip_sabotage_in+0x21b/0x290 net/bridge/br_netfilter_hooks.c:993
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
nf_hook.constprop.0+0x42e/0x750 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ipv6_rcv+0xa4/0x680 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5893
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6006
netif_receive_skb_internal net/core/dev.c:6092 [inline]
netif_receive_skb+0x13f/0x7b0 net/core/dev.c:6151
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_pass_frame_up+0x346/0x490 net/bridge/br_input.c:70
br_handle_frame_finish+0xecc/0x1c90 net/bridge/br_input.c:226
br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1170
br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
br_handle_frame+0xad7/0x14a0 net/bridge/br_input.c:433
__netif_receive_skb_core.constprop.0+0xa20/0x4330 net/core/dev.c:5787
__netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5891
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6006
process_backlog+0x443/0x15f0 net/core/dev.c:6354
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7188
napi_poll net/core/dev.c:7257 [inline]
net_rx_action+0xa94/0x1010 net/core/dev.c:7379
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 08 38 ac 74 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 58 1b 87 00 fb f4 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001b7d58 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8b578469
RDX: 0000000000000001 RSI: ffff88801da9d800 RDI: ffff88801da9d864
RBP: ffff88801da9d864 R08: 0000000000000001 R09: ffffed10170e6f85
R10: ffff8880b8737c2b R11: 0000000000000000 R12: ffff888141fa1800
R13: ffffffff8ee2e920 R14: 0000000000000001 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:699
cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:268
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:389
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x310/0x3f0 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148