rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15045/1:b..l P15044/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=87409, q=399 ncpus=2)
task:dhcpcd-run-hook state:R  running task     stack:23680 pid:15044 tgid:15044 ppid:4755   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d 1c 8b 45 0c 48 89 de 5b e9 23 40 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 c0 d4 03 00 65 8b 15 00 ad 6d 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc900105877d8 EFLAGS: 00000216
RAX: ffffffff82110a50 RBX: 0000000000000064 RCX: dffffc0000000000
RDX: ffff88802031bc00 RSI: 0000000000000064 RDI: 000000000000002e
RBP: ffffc90010587910 R08: ffffffff82110a3d R09: 1ffff920020b0f75
R10: dffffc0000000000 R11: ffffffff81c25140 R12: ffff88801d5b4bc0
R13: 534f75c68fef6b04 R14: ffffc90010587ba8 R15: 00000006534f75c6
 link_path_walk+0x480/0xea0 fs/namei.c:2280
 path_openat+0x257/0x35f0 fs/namei.c:3809
 do_filp_open+0x235/0x490 fs/namei.c:3840
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1413
 do_sys_open fs/open.c:1428 [inline]
 __do_sys_openat fs/open.c:1444 [inline]
 __se_sys_openat fs/open.c:1439 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1439
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8434003477
RSP: 002b:00007ffefb86bfa8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8434003477
RDX: 0000000000090800 RSI: 0000559299434d30 RDI: 00000000ffffff9c
RBP: 0000559299431d52 R08: 0000000000090800 R09: 0000559299434d30
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffefb86c108
R13: 0000559299431d51 R14: 0000559299434d49 R15: 000000000000001a
 </TASK>
task:syz.5.2175      state:R  running task     stack:25728 pid:15045 tgid:15042 ppid:12556  flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x630/0x9f0 kernel/locking/lockdep.c:5778
Code: 3c 3b 00 74 08 4c 89 f7 e8 cd 48 89 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000367f6c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920006cfeea RCX: ffffc9000367f703
RDX: 0000000000000001 RSI: ffffffff8bcaccc0 RDI: ffffffff8c1fe9c0
RBP: ffffc9000367f7f0 R08: ffffffff8fad4a2f R09: 1ffffffff1f5a945
R10: dffffc0000000000 R11: fffffbfff1f5a946 R12: 1ffff920006cfee4
R13: 0000000000000246 R14: ffffc9000367f750 R15: dffffc0000000000
 rcu_lock_release include/linux/rcupdate.h:339 [inline]
 rcu_read_unlock include/linux/rcupdate.h:812 [inline]
 pte_unmap include/linux/pgtable.h:115 [inline]
 follow_page_pte+0x865/0x1d90 mm/gup.c:1006
 follow_pmd_mask mm/gup.c:1040 [inline]
 follow_pud_mask mm/gup.c:1095 [inline]
 follow_p4d_mask mm/gup.c:1116 [inline]
 follow_page_mask+0x766/0x2e00 mm/gup.c:1162
 __get_user_pages+0x67e/0x1590 mm/gup.c:1587
 populate_vma_page_range+0x264/0x330 mm/gup.c:2029
 __mm_populate+0x27a/0x460 mm/gup.c:2132
 mm_populate include/linux/mm.h:3469 [inline]
 vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:578
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa2b7b75bd9
RSP: 002b:00007fa2b89c0048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fa2b7d04038 RCX: 00007fa2b7b75bd9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fa2b7be4aa1 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa2b7d04038 R15: 00007ffdce6234c8
 </TASK>