rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4434/1:b..l P41/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=156765, q=103 ncpus=2)
task:kworker/u4:2 state:R running task stack:21056 pid:41 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
preempt_schedule_notrace+0xfc/0x130 kernel/sched/core.c:6887
preempt_schedule_notrace_thunk+0x1a/0x20 arch/x86/entry/thunk_64.S:35
rcu_is_watching+0x7a/0xb0 kernel/rcu/tree.c:695
rcu_read_unlock include/linux/rcupdate.h:802 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x1d2/0x5c0 net/batman-adv/network-coding.c:719
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
task:udevd state:R running task stack:22120 pid:4434 ppid:1 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
preempt_schedule_irq+0xfb/0x1b0 kernel/sched/core.c:6937
irqentry_exit+0x57/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:206
Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d e4 37 c9 0c 48 89 de 5b e9 e3 e0 54 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d f0 61 79 7e 65 8b 15 f1 61 79 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc9000312f0a8 EFLAGS: 00000202
RAX: ffffffff81976893 RBX: 0000000000000001 RCX: ffff88807d250000
RDX: ffff88807d250000 RSI: ffffffff8b37fe60 RDI: ffffffff8b37fe20
RBP: 0000000000000001 R08: ffffffff81976881 R09: fffffbfff205c639
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807d250000
R13: ffffffff81785020 R14: 00007f023612a5a4 R15: 1ffff92000625e31
rcu_read_lock include/linux/rcupdate.h:774 [inline]
is_bpf_text_address+0x43/0x270 kernel/bpf/core.c:719
kernel_text_address+0xa3/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:342
arch_stack_walk+0xf7/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:967 [inline]
__kmalloc+0xb9/0x230 mm/slab_common.c:980
kmalloc include/linux/slab.h:584 [inline]
tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x254/0x4e0 security/tomoyo/file.c:771
security_file_open+0x63/0xa0 security/security.c:1719
do_dentry_open+0x308/0x10f0 fs/open.c:907
do_open fs/namei.c:3560 [inline]
path_openat+0x27b3/0x3170 fs/namei.c:3715
do_filp_open+0x234/0x490 fs/namei.c:3742
do_sys_openat2+0x13f/0x500 fs/open.c:1348
do_sys_open fs/open.c:1364 [inline]
__do_sys_openat fs/open.c:1380 [inline]
__se_sys_openat fs/open.c:1375 [inline]
__x64_sys_openat+0x247/0x290 fs/open.c:1375
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f023612a5a4
RSP: 002b:00007ffded061f98 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00005587bf3fc230 RCX: 00007f023612a5a4
RDX: 0000000000090800 RSI: 00005587bf3e4230 RDI: 00000000ffffff9c
RBP: 00005587bf432110 R08: 0000000000090800 R09: 00005587bf3e4230
R10: 0000000000000000 R11: 0000000000000287 R12: 00005587bf3e4230
R13: 00000000000000ff R14: 00007ffded061ff0 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10503 jiffies! g156765 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:26552 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1608
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1807
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 2845 Comm: kworker/u4:6 Not tainted 6.3.0-rc4-syzkaller-00195-g5a57b48fdfcb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0x23e4/0x3600 kernel/smp.c:987
Code: 0f b6 04 03 84 c0 75 7f 45 8b 37 44 89 f6 83 e6 01 31 ff e8 5e 0f 0b 00 41 83 e6 01 4d 89 e6 75 07 e8 a0 0b 0b 00 eb 40 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 10 41 f7 07 01
RSP: 0018:ffffc9000ccff5c0 EFLAGS: 00000293
RAX: ffffffff817f4704 RBX: 1ffff11017308955 RCX: ffff888029333a80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000ccff9c0 R08: ffffffff817f46d2 R09: fffffbfff205c639
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b993cfc0
R13: 0000000000000000 R14: ffff8880b993cfc0 R15: ffff8880b9844aa8
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53615ad988 CR3: 000000000cd30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1155
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1770 [inline]
text_poke_bp_batch+0x2bf/0x950 arch/x86/kernel/alternative.c:1970
text_poke_flush arch/x86/kernel/alternative.c:2161 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2168
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x132/0x250 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:803
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308