rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10317/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=54889, q=243 ncpus=2)
task:syz.3.1279 state:R running task stack:25560 pid:10317 tgid:10317 ppid:5616 task_flags:0x40004c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1295/0x67a0 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0x970 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5893
Code: ff 65 0f c1 05 db a5 25 12 83 f8 01 0f 85 28 01 00 00 9c 58 f6 c4 02 0f 85 13 01 00 00 41 f7 c6 00 02 00 00 0f 85 c0 00 00 00 <48> 8b 44 24 10 65 48 2b 05 2d 5e 25 12 0f 85 4e 01 00 00 48 83 c4
RSP: 0000:ffffc9000d8af770 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e7e55e0 RCX: ffffc9000d8af77c
RDX: 0000000000000001 RSI: ffffffff8dee9ff7 RDI: ffffffff8c1c4400
RBP: ffffffff825a9ecd R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888028b70000
R13: fffffbfff21ae800 R14: 0000000000000202 R15: 0000000000000002
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
pte_unmap include/linux/pgtable.h:117 [inline]
zap_pte_range mm/memory.c:1964 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0x2212/0x4a30 mm/memory.c:2109
unmap_vmas+0x299/0x5f0 mm/memory.c:2178
exit_mmap+0x1ef/0xa10 mm/mmap.c:1300
__mmput+0x12a/0x410 kernel/fork.c:1178
mmput+0x67/0x80 kernel/fork.c:1201
exit_mm kernel/exit.c:582 [inline]
do_exit+0x8b2/0x2af0 kernel/exit.c:964
do_group_exit+0xd5/0x2a0 kernel/exit.c:1119
__do_sys_exit_group kernel/exit.c:1130 [inline]
__se_sys_exit_group kernel/exit.c:1128 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1128
x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f276d79ce59
RSP: 002b:00007ffef0bdb2e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f276d79ce59
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffef0bdb34c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000108
R13: 00000000000927c0 R14: 000000000006a4c3 R15: 00007ffef0bdb3a0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g54889 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=29117
rcu: rcu_preempt kthread starved for 10500 jiffies! g54889 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27752 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1295/0x67a0 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7283
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:find_held_lock+0x6a/0x80 kernel/locking/lockdep.c:5373
Code: e6 48 89 df e8 97 46 a5 09 85 c0 75 19 83 ed 01 48 83 eb 28 83 fd ff 74 0b 0f b6 43 49 32 43 21 a8 60 74 da 31 db 41 89 6d 00 <48> 89 d8 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 66 0f 1f 44 00 00
RSP: 0018:ffffc90000006d50 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffffff8e4961f0 RCX: ffffc90000006d8c
RDX: 0000000000000005 RSI: ffffffff9b3f56f0 RDI: ffffffff8e4961f0
RBP: 0000000000000004 R08: 0000000000000001 R09: fffff52000000daa
R10: 0000000000000006 R11: 0000000000000001 R12: ffffffff9b3f56f0
R13: ffffc90000006d8c R14: 0000000000000005 R15: 0000000000000005
FS: 0000000000000000(0000) GS:ffff888124383000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2cd50c CR3: 000000002ed98000 CR4: 00000000003526f0
Call Trace:
__lock_release kernel/locking/lockdep.c:5535 [inline]
lock_release kernel/locking/lockdep.c:5889 [inline]
lock_release+0xdb/0x310 kernel/locking/lockdep.c:5875
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:176 [inline]
_raw_spin_unlock_irqrestore+0x1a/0x80 kernel/locking/spinlock.c:198
debug_object_activate+0x331/0x490 lib/debugobjects.c:863
debug_hrtimer_activate kernel/time/hrtimer.c:485 [inline]
debug_activate kernel/time/hrtimer.c:528 [inline]
enqueue_hrtimer+0x75/0x2f0 kernel/time/hrtimer.c:1109
__run_hrtimer kernel/time/hrtimer.c:1946 [inline]
__hrtimer_run_queues+0x73d/0xa00 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:198
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 66 3d 58 f6 48 89 df e8 3e 8d 58 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 55 59 48 f6 65 8b 05 3e 9d 7d 08 85 c0 74 16 5b
RSP: 0018:ffffc90000007148 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffffffff9b3a4d08 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff8df0f551 RDI: ffffffff8c1c4400
RBP: 0000000000000286 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888053feb800
__debug_check_no_obj_freed lib/debugobjects.c:1135 [inline]
debug_check_no_obj_freed+0x31f/0x630 lib/debugobjects.c:1156
slab_free_hook mm/slub.c:2620 [inline]
slab_free mm/slub.c:6251 [inline]
kfree+0x3d0/0x6c0 mm/slub.c:6566
ieee80211_inform_bss+0x8d5/0x1150 net/mac80211/scan.c:164
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0x8a1/0x1de0 net/wireless/scan.c:2372
cfg80211_inform_bss_data+0x237/0x3a00 net/wireless/scan.c:3229
cfg80211_inform_bss_frame_data+0x247/0x780 net/wireless/scan.c:3320
ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230
ieee80211_scan_rx+0x4e6/0xb60 net/mac80211/scan.c:364
__ieee80211_rx_handle_packet+0x7da/0xe20 net/mac80211/rx.c:5357
ieee80211_rx_list+0xd32/0x1fc0 net/mac80211/rx.c:5642
ieee80211_rx_napi+0xdc/0x400 net/mac80211/rx.c:5665
ieee80211_rx include/net/mac80211.h:5395 [inline]
ieee80211_handle_queued_frames+0xc8/0x120 net/mac80211/main.c:452
tasklet_action_common+0x2de/0x3d0 kernel/softirq.c:938
handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:sched_core_balance+0xa6/0xea0 kernel/sched/core.c:6419
Code: 0e 00 e8 1d 1a b3 09 5d 85 c0 0f 85 ba 0a 00 00 e9 8f 09 00 00 49 8d 7c 24 48 e8 45 09 b6 09 e8 d0 ab 3a 00 fb 48 63 44 24 48 <48> c7 c3 80 82 0b 94 48 89 dd 48 89 44 24 08 48 83 f8 08 0f 83 47
RSP: 0018:ffffffff8e407b80 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8df0f551 RDI: ffffffff8c1c4400
RBP: ffffffff81d6283d R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b843b280
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff81d627d0
do_balance_callbacks kernel/sched/core.c:5018 [inline]
__balance_callbacks+0x21d/0x6e0 kernel/sched/core.c:5074
__schedule+0x3186/0x67a0 kernel/sched/core.c:7192
schedule_idle+0x54/0x80 kernel/sched/core.c:7309
do_idle+0x2dd/0x590 kernel/sched/idle.c:381
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
rest_init+0x251/0x260 init/main.c:762
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148