rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15147/1:b..l
rcu: 	(detected by 0, t=10504 jiffies, g=79465, q=1169 ncpus=2)
task:dhcpcd          state:R  running task     stack:26672 pid:15147 tgid:15147 ppid:5282   task_flags:0x440040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:deref_stack_reg+0xe/0x220 arch/x86/kernel/unwind_orc.c:418
Code: 4c 24 18 e9 f2 fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 <48> 89 d3 49 89 f0 49 89 ff 48 be 00 00 00 00 00 fc ff df 48 83 c7
RSP: 0018:ffffc900035370d8 EFLAGS: 00000286
RAX: fffffffffffffff0 RBX: ffffffff90fe7fb4 RCX: 0000000000000000
RDX: ffffc90003537208 RSI: ffffc90003537e50 RDI: ffffc900035371c8
RBP: 1ffffffff21fcff6 R08: ffffc90003537e50 R09: ffffc90003537218
R10: dffffc0000000000 R11: fffff520006a6e45 R12: dffffc0000000000
R13: ffffffff90fe7fb5 R14: ffffc900035371c8 R15: ffffc90003537210
 unwind_next_frame+0x19bd/0x2550 arch/x86/kernel/unwind_orc.c:-1
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4584 [inline]
 slab_alloc_node mm/slub.c:4917 [inline]
 kmem_cache_alloc_noprof+0x2a0/0x5f0 mm/slub.c:4931
 journal_alloc_journal_head fs/jbd2/journal.c:2731 [inline]
 jbd2_journal_add_journal_head+0x90/0x4b0 fs/jbd2/journal.c:2799
 jbd2_journal_get_write_access+0x1c6/0x230 fs/jbd2/transaction.c:1259
 __ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6427
 __ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709
 generic_update_time fs/inode.c:2257 [inline]
 touch_atime+0x565/0x670 fs/inode.c:2332
 file_accessed include/linux/fs.h:2272 [inline]
 filemap_read+0xffc/0x11e0 mm/filemap.c:2886
 __kernel_read+0x4ca/0x960 fs/read_write.c:532
 prepare_binprm fs/exec.c:1633 [inline]
 search_binary_handler fs/exec.c:1680 [inline]
 exec_binprm fs/exec.c:1726 [inline]
 bprm_execve+0x8e8/0x1630 fs/exec.c:1778
 do_execveat_common+0x4f4/0x670 fs/exec.c:1876
 __do_sys_execve fs/exec.c:1949 [inline]
 __se_sys_execve fs/exec.c:1943 [inline]
 __x64_sys_execve+0x97/0xc0 fs/exec.c:1943
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda0703f107
RSP: 002b:00007fda06ea8e68 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00007fff3f914540 RCX: 00007fda0703f107
RDX: 0000564bf1d09c80 RSI: 00007fff3f914730 RDI: 0000564be7a1d6bd
RBP: 00007fda06ea8ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fff3f914220 R14: 00007fda06ea8f20 R15: 0000000000000040
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g79465 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=44192
rcu: rcu_preempt kthread starved for 10504 jiffies! g79465 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12764 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d d4 be 88 0c 48 89 de 5b e9 13 09 62 00 cc cc cc 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 0d 78 fe a5 11 65 8b 15 99 fe a5
RSP: 0018:ffffc90000a08d88 EFLAGS: 00000097
RAX: ffffffff81b3de81 RBX: 1ffff11005706e67 RCX: 0000000000010000
RDX: ffff88802d551f00 RSI: 0000000000000001 RDI: 0000000000000020
RBP: dffffc0000000000 R08: ffff88802b837327 R09: ffff88802b837318
R10: dffffc0000000000 R11: ffffed1005706e65 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88802b837300 R15: ffff8880b8728300
FS:  00007f9cb1b3f880(0000) GS:ffff888125050000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9cb158e000 CR3: 000000007ce96000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __remove_hrtimer+0x160/0x3e0 kernel/time/hrtimer.c:1156
 __run_hrtimer kernel/time/hrtimer.c:2012 [inline]
 __hrtimer_run_queues+0x295/0xa10 kernel/time/hrtimer.c:2096
 hrtimer_interrupt+0x448/0x910 kernel/time/hrtimer.c:2215
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:ma_dead_node lib/maple_tree.c:544 [inline]
RIP: 0010:mas_rewalk_if_dead lib/maple_tree.c:3842 [inline]
RIP: 0010:mas_next_slot+0xa0c/0xd70 lib/maple_tree.c:4174
Code: e1 f5 41 89 c6 31 ff 89 c6 e8 b0 cb fd f5 45 85 f6 0f 84 8c 00 00 00 e8 62 c7 fd f5 eb 05 e8 5b c7 fd f5 48 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 ef e8 95 59 6b f6 48 8b 45 00 48 c7 c1
RSP: 0018:ffffc90004acf3d0 EFLAGS: 00000216
RAX: 1ffff1100ef4fdc0 RBX: 0000000000000001 RCX: ffff88802d551f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888077a7ee00 R08: ffff88802d551f00 R09: 0000000000000005
R10: 0000000000000004 R11: 0000000000000000 R12: ffff88807edfa9f8
R13: ffff88805e4218c0 R14: 0000000000000001 R15: dffffc0000000000
 mas_find+0xab1/0xcf0 lib/maple_tree.c:5389
 vma_next include/linux/mm.h:1640 [inline]
 validate_mm+0xff/0x4f0 mm/vma.c:653
 mmap_region+0x168a/0x2310 mm/vma.c:2866
 do_mmap+0xc3b/0x10c0 mm/mmap.c:560
 vm_mmap_pgoff+0x272/0x4e0 mm/util.c:581
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9cb1c41822
Code: 00 00 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 76 5b 5d c3 0f 1f 00 48 8b 05 a1 35 0d 00 64
RSP: 002b:00007fff8aff4c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9cb1c41822
RDX: 0000000000000003 RSI: 0000000000000200 RDI: 0000000000000000
RBP: 0000000000000022 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000e7e200 R14: 00005602f08de0b0 R15: 0000000000f89200
 </TASK>