rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5784/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=12021, q=595 ncpus=2)
task:syz.2.136       state:R  running task     stack:26880 pid:5784  tgid:5778  ppid:5085   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
 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+0x3ba/0x6c0 kernel/locking/lockdep.c:5762
Code: 7e 83 f8 01 0f 85 f5 01 00 00 9c 58 f6 c4 02 0f 85 e0 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 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900035c7798 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: d5e9e978e57f2557 RCX: ffffc900035c77e8
RDX: 1ffff1100421e8da RSI: ffffffff8b2cb200 RDI: ffffffff8b9039c0
RBP: 1ffff920006b8ef5 R08: 0000000000000000 R09: fffffbfff1fc90da
R10: ffffffff8fe486d7 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000002 R14: ffff8880210f46d8 R15: ffff8880210f3c00
 rcu_lock_release include/linux/rcupdate.h:339 [inline]
 rcu_read_unlock include/linux/rcupdate.h:812 [inline]
 blk_cgroup_congested+0x15b/0x2a0 block/blk-cgroup.c:2195
 __folio_throttle_swaprate+0xa8/0x2f0 mm/swapfile.c:3695
 folio_throttle_swaprate include/linux/swap.h:633 [inline]
 folio_prealloc mm/memory.c:1060 [inline]
 alloc_anon_folio mm/memory.c:4397 [inline]
 do_anonymous_page mm/memory.c:4455 [inline]
 do_pte_missing mm/memory.c:3895 [inline]
 handle_pte_fault mm/memory.c:5381 [inline]
 __handle_mm_fault+0x2d1e/0x5410 mm/memory.c:5524
 handle_mm_fault+0x476/0xa00 mm/memory.c:5689
 do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc900035c7bd0 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000000040 RCX: 0000000000000040
RDX: fffff520006b8fbb RSI: ffffc900035c7d98 RDI: 00000000200f9000
RBP: 00000000200f9000 R08: 0000000000000000 R09: fffff520006b8fba
R10: ffffc900035c7dd7 R11: 0000000000000000 R12: ffffc900035c7e88
R13: 00000000200f9040 R14: ffffc900035c7d98 R15: 0000000000000000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
 copy_to_user_iter lib/iov_iter.c:25 [inline]
 iterate_ubuf include/linux/iov_iter.h:29 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
 iterate_and_advance include/linux/iov_iter.h:271 [inline]
 _copy_to_iter+0x37e/0x1140 lib/iov_iter.c:185
 copy_to_iter include/linux/uio.h:196 [inline]
 get_random_bytes_user+0x180/0x3c0 drivers/char/random.c:451
 __do_sys_getrandom drivers/char/random.c:1390 [inline]
 __se_sys_getrandom drivers/char/random.c:1364 [inline]
 __x64_sys_getrandom+0x184/0x290 drivers/char/random.c:1364
 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: 0033:0x7efc4f375bd9
RSP: 002b:00007efc50180048 EFLAGS: 00000246 ORIG_RAX: 000000000000013e
RAX: ffffffffffffffda RBX: 00007efc4f504038 RCX: 00007efc4f375bd9
RDX: 0000000000000000 RSI: 00000000ffffff4f RDI: 0000000020000600
RBP: 00007efc4f3e4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efc4f504038 R15: 00007ffd9abddb78
 </TASK>
rcu: rcu_preempt kthread starved for 10337 jiffies! g12021 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:27232 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-rc7-syzkaller-00256-gd0d0cd380055 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:kasan_get_free_meta mm/kasan/generic.c:465 [inline]
RIP: 0010:kasan_save_free_info+0xb/0x60 mm/kasan/generic.c:572
Code: cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 63 bf c0 00 00 00 <81> ff ff ff ff 7f 74 48 48 01 f7 74 43 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000007b88 EFLAGS: 00000246
RAX: ffffed100aa38390 RBX: ffff8880551c1c80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8880551c1c80 RDI: 0000000000000000
RBP: ffff888019299780 R08: 0000000000000140 R09: 0000000000000000
R10: ffffed100aa38390 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff88bca49e R14: ffffea0001547040 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3bed4f CR3: 0000000062c8e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2196 [inline]
 slab_free mm/slub.c:4438 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4513
 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131
 __kfree_skb net/core/skbuff.c:1188 [inline]
 consume_skb net/core/skbuff.c:1409 [inline]
 consume_skb+0xdd/0x170 net/core/skbuff.c:1403
 mac80211_hwsim_tx_frame+0x1f3/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim.c:2207
 __mac80211_hwsim_beacon_tx drivers/net/wireless/virtual/mac80211_hwsim.c:2223 [inline]
 mac80211_hwsim_beacon_tx+0x592/0xa00 drivers/net/wireless/virtual/mac80211_hwsim.c:2306
 __iterate_interfaces+0x2d2/0x580 net/mac80211/util.c:772
 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:808
 mac80211_hwsim_beacon+0x105/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2336
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1770
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 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:72 [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 c8 d4 1b 75 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 78 72 b3 00 fb f4 <fa> c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8d807d70 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8ae7e759
RDX: 0000000000000001 RSI: ffff88801a2b2000 RDI: ffff88801a2b2064
RBP: ffff88801a2b2064 R08: 0000000000000001 R09: ffffed1017246fdd
R10: ffff8880b9237eeb R11: 0000000000000000 R12: ffff88801b35b000
R13: ffffffff8e745940 R14: 0000000000000000 R15: 0000000000000000
 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:702
 cpuidle_enter_state+0x85/0x500 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x313/0x3f0 kernel/sched/idle.c:332
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 rest_init+0x16b/0x2b0 init/main.c:747
 start_kernel+0x3df/0x4c0 init/main.c:1103
 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
 common_startup_64+0x13e/0x148
 </TASK>
sched: RT throttling activated