rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (0 ticks this GP) idle=c33/1/0x4000000000000002 softirq=75207/75207 fqs=2099 (detected by 1, t=10502 jiffies, g=106701, q=1406) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24068 Comm: dhcpcd-run-hook Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:202 Code: 66 2e 0f 1f 84 00 00 00 00 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 30 c0 10 0c 48 89 de 5b e9 57 50 44 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d c4 26 89 7e 65 8b 15 c5 26 89 7e 81 e2 00 RSP: 0018:ffffc9000323ec90 EFLAGS: 00000093 RAX: ffffffff819c39c5 RBX: 0000000000000001 RCX: ffff888023d0bb80 RDX: 0000000000000000 RSI: ffffffff8a7a09a0 RDI: ffff888023d0bb80 RBP: ffffc9000323edd0 R08: ffffc9000323ed57 R09: ffffc9000323ed40 R10: dffffc0000000000 R11: fffff52000647dab R12: 1ffff92000647da4 R13: ffffc9000323ee20 R14: dffffc0000000000 R15: ffff88805349afc0 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558baf69f8 CR3: 0000000085344000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release+0xa/0x40 include/linux/rcupdate.h:318 __perf_output_begin kernel/events/ring_buffer.c:262 [inline] perf_output_begin_forward+0x79b/0xa40 kernel/events/ring_buffer.c:271 __perf_event_output kernel/events/core.c:7804 [inline] perf_event_output_forward+0x19b/0x2e0 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_swevent_overflow kernel/events/core.c:9591 [inline] perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 f2 cc 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc9000323f460 EFLAGS: 00000206 RAX: 9f86ff11c5d60000 RBX: 1ffff92000647e90 RCX: 9f86ff11c5d60000 RDX: dffffc0000000000 RSI: ffffffff8a2b3180 RDI: ffffffff8a7a09c0 RBP: ffffc9000323f530 R08: ffffffff901d80c7 R09: 1ffffffff203b018 R10: dffffc0000000000 R11: fffffbfff203b019 R12: ffffffff8c323800 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] __unlock_page_memcg+0xea/0x100 mm/memcontrol.c:2093 zap_pte_range mm/memory.c:1384 [inline] zap_pmd_range mm/memory.c:1505 [inline] zap_pud_range mm/memory.c:1534 [inline] zap_p4d_range mm/memory.c:1555 [inline] unmap_page_range+0xf96/0x2500 mm/memory.c:1576 unmap_vmas+0x131/0x250 mm/memory.c:1653 exit_mmap+0x3b9/0x640 mm/mmap.c:3216 __mmput+0x115/0x3b0 kernel/fork.c:1127 exec_mmap+0x51d/0x610 fs/exec.c:1035 begin_new_exec+0x7e8/0x1160 fs/exec.c:1293 load_elf_binary+0x99c/0x28e0 fs/binfmt_elf.c:1001 search_binary_handler fs/exec.c:1742 [inline] exec_binprm fs/exec.c:1783 [inline] bprm_execve+0xaee/0x1840 fs/exec.c:1852 do_execveat_common+0x51e/0x6d0 fs/exec.c:1957 do_execve fs/exec.c:2027 [inline] __do_sys_execve fs/exec.c:2103 [inline] __se_sys_execve fs/exec.c:2098 [inline] __x64_sys_execve+0x8e/0xa0 fs/exec.c:2098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f621f425107 Code: Unable to access opcode bytes at RIP 0x7f621f4250dd. RSP: 002b:00007ffe035ccc88 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000055d08d9b40c8 RCX: 00007f621f425107 RDX: 000055d08d9b40e8 RSI: 000055d08d9b40c8 RDI: 000055d08d9b4170 RBP: 000055d08d9b4170 R08: 00007ffe035d0ea9 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055d08d9b40e8 R13: 00007f621f5eae8b R14: 000055d08d9b40e8 R15: 0000000000000000