rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=c0dc/1/0x4000000000000000 softirq=58152/58154 fqs=6
rcu: (detected by 0, t=10502 jiffies, g=60281, q=514 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13653 Comm: modprobe Not tainted 6.15.0-rc2-syzkaller-00493-gac71fabf1567 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x86/0x2a0 mm/kasan/generic.c:189
Code: 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 <0f> 85 d6 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 00 45 89 dc
RSP: 0018:ffffc90000a08be0 EFLAGS: 00000046
RAX: 1ffff110024bb701 RBX: 1ffff1100f68705c RCX: ffffffff8a25ed7a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807b4382e0
RBP: ffffffffffffffff R08: ffff88807b4382e7 R09: 1ffff1100f68705c
R10: dffffc0000000000 R11: ffffed100f68705c R12: 0000000000000000
R13: ffff8880125db800 R14: dffffc0000000001 R15: ffffed100f68705d
FS: 0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda2a8ec440 CR3: 0000000062eec000 CR4: 0000000000350ef0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic64_read include/linux/atomic/atomic-instrumented.h:1610 [inline]
taprio_set_budgets+0x1ba/0x380 net/sched/sch_taprio.c:670
advance_sched+0x98d/0xca0 net/sched/sch_taprio.c:977
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x5a8/0xd40 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset+0xf/0x20 arch/x86/lib/memset_64.S:38
Code: 44 88 1f e9 6e 77 e0 f4 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 e9 42 77 e0 f4 0f 1f 80 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900044273c0 EFLAGS: 00000202
RAX: ffffc90004427c00 RBX: ffffc900044274f0 RCX: 000000000000000f
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900044274f1
RBP: dffffc0000000000 R08: ffffc900044274ff R09: ffffc900044274f0
R10: dffffc0000000000 R11: fffff52000884ea0 R12: ffffc900044274a0
R13: ffffc90004428000 R14: ffffffff81811345 R15: ffffc90004420000
unwind_next_frame+0xb46/0x23b0 arch/x86/kernel/unwind_orc.c:592
arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548
__call_rcu_common kernel/rcu/tree.c:3082 [inline]
call_rcu+0x172/0xad0 kernel/rcu/tree.c:3202
slab_free_hook mm/slub.c:2362 [inline]
slab_free mm/slub.c:4656 [inline]
kmem_cache_free+0x312/0x410 mm/slub.c:4758
exit_mmap+0x73e/0xde0 mm/mmap.c:1309
__mmput+0x115/0x420 kernel/fork.c:1379
exit_mm+0x221/0x310 kernel/exit.c:589
do_exit+0x994/0x27f0 kernel/exit.c:940
do_group_exit+0x207/0x2c0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda2a9aaa90
Code: Unable to access opcode bytes at 0x7fda2a9aaa66.
RSP: 002b:00007ffdaa1101e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fda2aa9b860 RCX: 00007fda2a9aaa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fda2aa9b860 R08: 00007ffdaa110060 R09: 00007ffdaa110140
R10: 00007ffdaa1100a0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fda2aa9f658 R15: 0000000000000001
rcu: rcu_preempt kthread starved for 10490 jiffies! g60281 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26376 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
kthread+0x7b9/0x940 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 62 Comm: kworker/u8:4 Not tainted 6.15.0-rc2-syzkaller-00493-gac71fabf1567 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bb6/0x2d40 kernel/smp.c:885
Code: 89 e6 83 e6 01 31 ff e8 88 dd 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 38 d9 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 03 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 13 d9 0b
RSP: 0018:ffffc90001547640 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: 1ffff110170e7e91 RCX: ffff88801cb98000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001547840 R08: ffffffff81b6e3d8 R09: 1ffffffff20bfcae
R10: dffffc0000000000 R11: fffffbfff20bfcaf R12: ffff8880b863ad08
R13: ffff8880b873f488 R14: ffff8880b863ad00 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888124f9a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fafcebfdffc CR3: 000000000eb38000 CR4: 0000000000350ef0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2455 [inline]
text_poke_bp_batch+0x354/0xb30 arch/x86/kernel/alternative.c:2665
text_poke_flush arch/x86/kernel/alternative.c:2856 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xc0/0x250 mm/kfence/core.c:850
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac5/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b9/0x940 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245