rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P24642/1:b..l.. P24648/1:b..l.. P24636/1:b..l..
rcu: 	(detected by 1, t=10502 jiffies, g=175901, q=545 ncpus=2)
task:syz.3.4443      state:R  running task     stack:26488 pid:24636 tgid:24636 ppid:18203  task_flags:0x40004c flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5584 [inline]
 __schedule+0x125e/0x6a40 kernel/sched/core.c:7389
 preempt_schedule_common kernel/sched/core.c:7568 [inline]
 preempt_schedule+0x57/0xd0 kernel/sched/core.c:7592
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 zap_pte_range mm/memory.c:2059 [inline]
 zap_pmd_range mm/memory.c:2117 [inline]
 zap_pud_range mm/memory.c:2145 [inline]
 zap_p4d_range mm/memory.c:2166 [inline]
 __zap_vma_range+0x1679/0x46c0 mm/memory.c:2206
 unmap_vmas+0x294/0x5f0 mm/memory.c:2275
 exit_mmap+0x1ef/0xa40 mm/mmap.c:1315
 __mmput+0x12a/0x410 kernel/fork.c:1192
 mmput+0x62/0x70 kernel/fork.c:1215
 exit_mm kernel/exit.c:586 [inline]
 do_exit+0x80c/0x2a00 kernel/exit.c:967
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1123
 __do_sys_exit_group kernel/exit.c:1134 [inline]
 __se_sys_exit_group kernel/exit.c:1132 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1132
 x64_sys_call+0x1567/0x1570 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc2783a8f19
RSP: 002b:00007fff2c1af6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc2783a8f19
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff2c1af71c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000000fd
R13: 00000000000927c0 R14: 000000000020495d R15: 00007fff2c1af770
 </TASK>
task:modprobe        state:R  running task     stack:24472 pid:24648 tgid:24648 ppid:14952  task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5584 [inline]
 __schedule+0x125e/0x6a40 kernel/sched/core.c:7389
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7669
 irqentry_exit_cond_resched arch/x86/include/asm/fred.h:105 [inline]
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:453 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x33f/0xab0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 cf 89 d1 13 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 de 6c 81 10 0f 82 c9 02 00 00 8b 35 be 9c 81 10 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 6d 89 d1 13 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc90006316618 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e602ac7 RDI: ffffffff8c835a80
RBP: ffffffff8ffed020 R08: 00000000a271bfbd R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:351 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:377
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4720 [inline]
 kmem_cache_alloc_from_sheaf_noprof+0xab/0x1c0 mm/slub.c:5437
 mas_pop_node lib/maple_tree.c:1025 [inline]
 dst_setup+0x339/0x950 lib/maple_tree.c:2381
 mas_wr_split+0xa70/0x35a0 lib/maple_tree.c:3498
 mas_wr_store_entry+0xcea/0x1d50 lib/maple_tree.c:3575
 mas_store_prealloc+0x6e7/0x10a0 lib/maple_tree.c:4990
 vma_iter_store_new mm/vma.h:744 [inline]
 vma_complete+0x9a9/0x1160 mm/vma.c:384
 __split_vma+0x8c8/0xce0 mm/vma.c:603
 vms_gather_munmap_vmas+0x3a5/0x1720 mm/vma.c:1545
 __mmap_setup mm/vma.c:2591 [inline]
 __mmap_region+0x4d4/0x3910 mm/vma.c:3071
 mmap_region+0x3db/0x6d0 mm/vma.c:3173
 do_mmap+0x12c7/0x1c30 mm/mmap.c:573
 vm_mmap_pgoff+0x283/0x490 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:619
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:96 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:89
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0cf6dfc242
RSP: 002b:00007ffd27e022a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0cf6b12000 RCX: 00007f0cf6dfc242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f0cf6b12000
RBP: 0000000000000812 R08: 0000000000000000 R09: 000000000000d000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffd27e02368
R13: 00007f0cf6dd1580 R14: 00007ffd27e02720 R15: 00000fffa4fc0458
 </TASK>
task:syz.9.4444      state:R  running task     stack:25320 pid:24642 tgid:24638 ppid:19440  task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5584 [inline]
 __schedule+0x125e/0x6a40 kernel/sched/core.c:7389
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7669
 irqentry_exit_cond_resched arch/x86/include/asm/fred.h:105 [inline]
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:453 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x33f/0xab0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__local_bh_enable_ip+0xaf/0x120 kernel/softirq.c:480
Code: ef 13 65 48 63 05 b9 29 ef 13 a9 00 ff 00 ff 74 4d bf 01 00 00 00 e8 30 c2 0c 00 e8 bb 10 4b 00 fb 65 48 83 3d 99 29 ef 13 00 <74> 50 5b 5d e9 c8 f3 26 0a 65 8b 05 55 6e ef 13 85 c0 75 99 90 0f
RSP: 0018:ffffc900061df768 EFLAGS: 00000286
RAX: 000000000001c47f RBX: fffffffffffffe01 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8e629af0 RDI: ffffffff8c835a80
RBP: ffffffff89fc8eb4 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff92000c3beff
R13: ffffc90005f83000 R14: ffffc900061df8c8 R15: dffffc0000000000
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 bpf_test_run+0x2a9/0xa40 net/bpf/test_run.c:425
 bpf_prog_test_run_skb+0x10f8/0x3560 net/bpf/test_run.c:1226
 bpf_prog_test_run kernel/bpf/syscall.c:4860 [inline]
 __sys_bpf+0x1d13/0x4b60 kernel/bpf/syscall.c:6478
 __do_sys_bpf kernel/bpf/syscall.c:6582 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6579 [inline]
 __x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6579
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdc15a8f19
RSP: 002b:00007efdc2540028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007efdc1825fa0 RCX: 00007efdc15a8f19
RDX: 0000000000000050 RSI: 0000200000000680 RDI: 000000000000000a
RBP: 00007efdc1637f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efdc1826038 R14: 00007efdc1825fa0 R15: 00007ffc32e9dc28
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g175901 f0x0 RCU_GP_WAIT_FQS(5) ->state=I
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=128590
rcu: rcu_preempt kthread starved for 10502 jiffies! g175901 f0x0 RCU_GP_WAIT_FQS(5) ->state=I ->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:28856 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5584 [inline]
 __schedule+0x125e/0x6a40 kernel/sched/core.c:7389
 __schedule_loop kernel/sched/core.c:7466 [inline]
 schedule+0xdd/0x2c0 kernel/sched/core.c:7481
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x930 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x179/0x260 kernel/rcu/tree.c:2330
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 24646 Comm: syz.9.4444 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:lock_release+0x20/0x310 kernel/locking/lockdep.c:5951
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 54 55 53 48 89 fb 48 83 ec 18 65 48 8b 2d 2d 84 d1 13 48 89 6c 24 10 <48> 89 f5 0f 1f 44 00 00 65 8b 05 49 84 d1 13 83 f8 07 0f 87 07 02
RSP: 0018:ffffc90000007d98 EFLAGS: 00000092
RAX: 8000000001000001 RBX: ffffffff8ffed020 RCX: 0000000001000001
RDX: ffff888035dca580 RSI: ffffffff89f3761b RDI: ffffffff8ffed020
RBP: bc281f0d0d33a000 R08: 0000000000000000 R09: 0000000000000001
R10: ffff88802c5f419f R11: 0000000000000001 R12: 0000000000000001
R13: 1a02cbfc22bacb80 R14: ffff888034dcf008 R15: ffff888034dcf000
FS:  00007efdc251f6c0(0000) GS:ffff888122471000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdc1814080 CR3: 0000000075b95000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_lock_release include/linux/rcupdate.h:319 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 advance_sched+0x770/0xd20 net/sched/sch_taprio.c:1007
 __run_hrtimer kernel/time/hrtimer.c:2079 [inline]
 __hrtimer_run_queues+0x448/0x9a0 kernel/time/hrtimer.c:2136
 hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2255
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:finish_task_switch.isra.0+0x2ca/0x10d0 kernel/sched/core.c:5435
Code: b6 0a 00 00 41 c7 87 20 0e 00 00 00 00 00 00 e9 47 04 00 00 49 8d 7f 48 e8 a3 32 19 0a e8 4e 9d 3d 00 fb 48 8d bb 18 17 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84
RSP: 0018:ffffc90006c9f3c0 EFLAGS: 00000206
RAX: 0000000000000559 RBX: ffff888035dca580 RCX: 0000000000000040
RDX: 0000000000000001 RSI: ffffffff8e629af0 RDI: ffff888035dcbc98
RBP: ffffc90006c9f418 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802d9d8000
R13: 0000000000000001 R14: ffffffff926b0344 R15: ffff8880b803c900
 context_switch kernel/sched/core.c:5587 [inline]
 __schedule+0x1266/0x6a40 kernel/sched/core.c:7389
 preempt_schedule_common kernel/sched/core.c:7568 [inline]
 preempt_schedule+0x57/0xd0 kernel/sched/core.c:7592
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __mutex_lock_common kernel/locking/mutex.c:656 [inline]
 __mutex_lock+0x8ef/0x1c10 kernel/locking/mutex.c:821
 pcpu_alloc_noprof+0xfa8/0x1e50 mm/percpu.c:1795
 alloc_vfsmnt+0x1e4/0x840 fs/namespace.c:337
 clone_mnt+0x4b/0x9c0 fs/namespace.c:1335
 copy_tree+0x327/0xc50 fs/namespace.c:2270
 copy_mnt_ns+0x3e8/0x1180 fs/namespace.c:4443
 create_new_namespaces+0xd3/0xac0 kernel/nsproxy.c:99
 copy_namespaces+0x468/0x5e0 kernel/nsproxy.c:195
 copy_process+0x3a98/0x88e0 kernel/fork.c:2331
 kernel_clone+0x176/0x9d0 kernel/fork.c:2798
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2940
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdc15a8f19
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efdc251efd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007efdc1826090 RCX: 00007efdc15a8f19
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000020000
RBP: 00007efdc1637f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007efdc1826128 R14: 00007efdc1826090 R15: 00007ffc32e9dc28
 </TASK>