rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10559/1:b..l P10524/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=44677, q=1108 ncpus=2)
task:syz.4.814       state:R  running task     stack:26032 pid:10524 tgid:10523 ppid:5840   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5313 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7019
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 5b 83 02 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000c2573c8 EFLAGS: 00000206
RAX: 5b1f987fd69f1600 RBX: 0000000000000000 RCX: 5b1f987fd69f1600
RDX: 0000000000000001 RSI: ffffffff8db80736 RDI: ffffffff8be31f80
RBP: ffffffff822c7089 R08: 0000000000000000 R09: ffffffff822c7089
R10: dffffc0000000000 R11: fffff94000233861 R12: 0000000000000002
R13: ffffffff8e13bf20 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
 percpu_ref_put+0x35/0x180 include/linux/percpu-refcount.h:351
 __mem_cgroup_uncharge_folios+0xf0/0x1c0 mm/memcontrol.c:4903
 mem_cgroup_uncharge_folios include/linux/memcontrol.h:680 [inline]
 folios_put_refs+0x551/0x640 mm/swap.c:991
 folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x49e/0x14b0 mm/shmem.c:1149
 shmem_truncate_range mm/shmem.c:1261 [inline]
 shmem_evict_inode+0x272/0xa70 mm/shmem.c:1389
 evict+0x501/0x9c0 fs/inode.c:810
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 dput+0x19f/0x2b0 fs/dcache.c:911
 __fput+0x68e/0xa70 fs/file_table.c:476
 fput_close_sync+0x119/0x200 fs/file_table.c:573
 __do_sys_close fs/open.c:1586 [inline]
 __se_sys_close fs/open.c:1571 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1571
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7f178d58a
RSP: 002b:00007fa7f269de00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fa7f178d58a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000000 R09: 00000000000050ed
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fa7f269def0 R14: 00007fa7f269deb0 R15: 00007fa7e7000000
 </TASK>
task:syz.7.821       state:R  running task     stack:26920 pid:10559 tgid:10559 ppid:9073   task_flags:0x40004c flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5313 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7019
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:pmdp_get include/linux/pgtable.h:347 [inline]
RIP: 0010:pmdp_get_lockless include/linux/pgtable.h:635 [inline]
RIP: 0010:___pte_offset_map+0xe6/0x250 mm/pgtable-generic.c:288
Code: 96 8b e8 1d 1a 8d ff 49 bd 00 00 00 00 00 fc ff df 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 6d 25 13 00 4d 8b 26 <4c> 89 24 24 4d 85 ff 74 20 e8 bc 25 af ff 4c 89 f8 48 c1 e8 03 42
RSP: 0018:ffffc9000bcc7528 EFLAGS: 00000246
RAX: 1ffff1100af87c83 RBX: 00007fbb9077d000 RCX: ffff8880767b9e00
RDX: 0000000000000000 RSI: ffffffff8be31f60 RDI: ffffffff8be31f20
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8210abd9
R10: ffffc9000bcc77e0 R11: fffff52001798efe R12: 000000002f3d8067
R13: dffffc0000000000 R14: ffff888057c3e418 R15: ffffc9000bcc7598
 __pte_offset_map include/linux/mm.h:3012 [inline]
 __pte_offset_map_lock+0x46/0x210 mm/pgtable-generic.c:397
 pte_offset_map_lock include/linux/mm.h:3027 [inline]
 zap_pte_range mm/memory.c:1725 [inline]
 zap_pmd_range mm/memory.c:1831 [inline]
 zap_pud_range mm/memory.c:1860 [inline]
 zap_p4d_range mm/memory.c:1881 [inline]
 unmap_page_range+0x3b9a/0x4380 mm/memory.c:1902
 unmap_single_vma mm/memory.c:1945 [inline]
 unmap_vmas+0x399/0x580 mm/memory.c:1989
 exit_mmap+0x248/0xb50 mm/mmap.c:1284
 __mmput+0x118/0x420 kernel/fork.c:1120
 exit_mm+0x1da/0x2c0 kernel/exit.c:581
 do_exit+0x648/0x2300 kernel/exit.c:947
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1100
 __do_sys_exit_group kernel/exit.c:1111 [inline]
 __se_sys_exit_group kernel/exit.c:1109 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1109
 x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbb9198e929
RSP: 002b:00007ffca6367718 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbb9198e929
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffca636777c R08: 00000002a636780f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002f
R13: 00000000000927c0 R14: 000000000009881a R15: 00007ffca63677d0
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g44677 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:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5313 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696
 __schedule_loop kernel/sched/core.c:6774 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6789
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2060
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2262
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 10562 Comm: rm Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:lock_acquire+0x9/0x360 kernel/locking/lockdep.c:5831
Code: 00 0f 95 c0 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 48 83 ec 60 4d 89 ce 45 89 c7 41 89 cc 89 54 24 04
RSP: 0018:ffffc90000a08670 EFLAGS: 00000246
RAX: 0000000000000004 RBX: ffffffff8223ca96 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e13bf20
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000a087b8 R11: ffffffff81ac6700 R12: 1ffff920001410ed
R13: ffffc90000a087a0 R14: ffffc90000a08768 R15: ffffffff81728c65
FS:  0000000000000000(0000) GS:ffff888125d1e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95098b4000 CR3: 000000002a02c000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4782
 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323
 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:761
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797
 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885
Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 60 69 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 65 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 f0 64 0b
RSP: 0018:ffffc9000c4c7060 EFLAGS: 00000293
RAX: ffffffff81b46d70 RBX: ffff8880b873b180 RCX: ffff888026ad3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000c4c71c0 R08: ffffffff8fa18937 R09: 1ffffffff1f43126
R10: dffffc0000000000 R11: fffffbfff1f43127 R12: 1ffff110170c8339
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86419c8
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x6b1/0x12c0 arch/x86/mm/tlb.c:1451
 move_ptes mm/mremap.c:303 [inline]
 move_page_tables+0x1e29/0x2490 mm/mremap.c:860
 relocate_vma_down+0x316/0x500 mm/vma_exec.c:66
 setup_arg_pages+0x5df/0xaa0 fs/exec.c:687
 load_elf_binary+0xb9f/0x2730 fs/binfmt_elf.c:1013
 search_binary_handler fs/exec.c:1665 [inline]
 exec_binprm fs/exec.c:1697 [inline]
 bprm_execve+0x99c/0x1450 fs/exec.c:1749
 do_execveat_common+0x510/0x6a0 fs/exec.c:1855
 do_execve fs/exec.c:1929 [inline]
 __do_sys_execve fs/exec.c:2005 [inline]
 __se_sys_execve fs/exec.c:2000 [inline]
 __x64_sys_execve+0x94/0xb0 fs/exec.c:2000
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff31197d107
Code: Unable to access opcode bytes at 0x7ff31197d0dd.
RSP: 002b:00007ffc72952c98 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00005634765a1fe0 RCX: 00007ff31197d107
RDX: 00005634765a2000 RSI: 00005634765a1fe0 RDI: 00005634765a2088
RBP: 00005634765a2088 R08: 00007ffc72955dce R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00005634765a2000
R13: 00007ff311b42e8b R14: 00005634765a2000 R15: 0000000000000000
 </TASK>