rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6239/1:b..l P6255/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=7433, q=2209 ncpus=2)
task:syz.2.86 state:R running task stack:27584 pid:6255 tgid:6254 ppid:5815 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6760
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6939
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1705 [inline]
zap_pmd_range mm/memory.c:1753 [inline]
zap_pud_range mm/memory.c:1782 [inline]
zap_p4d_range mm/memory.c:1803 [inline]
unmap_page_range+0xb87/0x3d60 mm/memory.c:1824
unmap_single_vma+0x194/0x2b0 mm/memory.c:1870
unmap_vmas+0x22f/0x490 mm/memory.c:1914
exit_mmap+0x1c6/0xba0 mm/mmap.c:1672
__mmput+0x12a/0x4c0 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2d70 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fb4f85d29
RSP: 002b:00007f6fb5dbc0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f6fb5175fa8 RCX: 00007f6fb4f85d29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6fb5175fa8
RBP: 00007f6fb5175fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6fb5175fac
R13: 0000000000000000 R14: 00007ffc523e4230 R15: 00007ffc523e4318
task:syz.3.82 state:R running task stack:27664 pid:6239 tgid:6236 ppid:5820 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6760
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7082
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:bpf_ksym_find+0x122/0x1c0 kernel/bpf/core.c:741
Code: 04 89 de 44 89 f7 e8 3d 04 f1 ff 41 39 de 0f 85 0f ff ff ff e8 ef 09 f1 ff 48 85 ed 74 0c e8 e5 09 f1 ff 48 81 ed 20 02 00 00 d9 09 f1 ff 48 89 e8 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000b257330 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000024 RCX: ffffffff81a8e023
RDX: ffff88802651a440 RSI: ffffffff81a8e031 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000024
R10: 0000000000000024 R11: 0000000000000001 R12: 00007f5965785d29
R13: dffffc0000000000 R14: 0000000000000024 R15: ffff88802651a440
is_bpf_text_address+0x58/0x1a0 kernel/bpf/core.c:773
kernel_text_address kernel/extable.c:125 [inline]
kernel_text_address+0x8d/0x100 kernel/extable.c:94
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xa7/0x100 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kmem_cache_free+0x152/0x4c0 mm/slub.c:4715
pmd_ptlock_free include/linux/mm.h:3095 [inline]
pagetable_pmd_dtor include/linux/mm.h:3137 [inline]
___pmd_free_tlb+0x74/0x2f0 arch/x86/mm/pgtable.c:72
__pmd_free_tlb arch/x86/include/asm/pgalloc.h:93 [inline]
free_pmd_range mm/memory.c:226 [inline]
free_pud_range mm/memory.c:244 [inline]
free_p4d_range mm/memory.c:278 [inline]
free_pgd_range+0x9ca/0xbc0 mm/memory.c:358
free_pgtables+0x1c1/0x950 mm/memory.c:411
exit_mmap+0x40b/0xba0 mm/mmap.c:1683
__mmput+0x12a/0x4c0 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2d70 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5965785d29
RSP: 002b:00007f59664e6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007f5965976160 RCX: 00007f5965785d29
RDX: 0400000000000041 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f5965801b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5965976160 R15: 00007ffd24d63dd8