rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=875/1/0x4000000000000002 softirq=150899/150900 fqs=5237 (detected by 1, t=10502 jiffies, g=207057, q=1653) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14773 Comm: dhcpcd-run-hook Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:cmp_ex_search+0x1a/0x70 lib/extable.c:94 Code: 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 57 41 56 53 48 89 f3 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 26 a1 6f fd <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 d0 c3 b4 fd RSP: 0018:ffffc90002f3e920 EFLAGS: 00000093 RAX: ffffffff84095b8a RBX: ffffffff8bfacc68 RCX: ffff88805cfc3b80 RDX: 0000000000000000 RSI: ffffffff8bfacc68 RDI: ffffc90002f3e9a0 RBP: ffffffff8bfacc68 R08: ffffffff84095b70 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8bfa9b30 R13: ffffc90002f3e9a0 R14: ffffc90002f3e9a0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055772a7b7130 CR3: 000000007ad88000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __inline_bsearch include/linux/bsearch.h:15 [inline] bsearch+0x45/0xb0 lib/bsearch.c:33 search_extable+0x8c/0xd0 lib/extable.c:116 search_kernel_exception_table kernel/extable.c:48 [inline] search_exception_tables+0x36/0x60 kernel/extable.c:57 fixup_exception+0x4c/0x1560 arch/x86/mm/extable.c:156 kernelmode_fixup_or_oops+0x6c/0xd0 arch/x86/mm/fault.c:719 handle_page_fault arch/x86/mm/fault.c:1443 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0010:__get_user_nocheck_8+0x6/0x13 arch/x86/lib/getuser.S:155 Code: 01 ca c3 90 0f 01 cb 0f ae e8 0f b7 10 31 c0 0f 01 ca c3 90 0f 01 cb 0f ae e8 8b 10 31 c0 0f 01 ca c3 90 90 0f 01 cb 0f ae e8 <48> 8b 10 31 c0 0f 01 ca c3 90 0f 01 ca 31 d2 48 c7 c0 f2 ff ff ff RSP: 0018:ffffc90002f3ebc0 EFLAGS: 00050802 RAX: 000055772a7b7130 RBX: dffffc0000000000 RCX: ffff88805cfc3b80 RDX: 1ffff920005e7d96 RSI: 000055772a7b7130 RDI: 00007fffffffeff0 RBP: 0000000000000000 R08: ffffffff8d8b0def R09: 1ffffffff1b161bd R10: dffffc0000000000 R11: fffffbfff1b161be R12: ffff88805cfc5308 R13: 00000000ffffffff R14: 000055772a7b7130 R15: 000000000000007f perf_callchain_user+0x423/0xf80 arch/x86/events/core.c:2900 get_perf_callchain+0x33d/0x460 kernel/events/callchain.c:221 perf_callchain kernel/events/core.c:7606 [inline] perf_prepare_sample+0x352/0x1cb0 kernel/events/core.c:7633 __perf_event_output kernel/events/core.c:7802 [inline] perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515 perf_tp_event+0x324/0xbe0 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 02 20 9d 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:ffffc90002f3f460 EFLAGS: 00000206 RAX: 140d05d42c700c00 RBX: 1ffff920005e7e90 RCX: 140d05d42c700c00 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4200 RBP: ffffc90002f3f530 R08: ffffffff901ee0c7 R09: 1ffffffff203dc18 R10: dffffc0000000000 R11: fffffbfff203dc19 R12: ffffffff8c323400 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+0xee4/0x2410 mm/memory.c:1576 unmap_vmas+0x131/0x250 mm/memory.c:1653 exit_mmap+0x3b9/0x640 mm/mmap.c:3216 __mmput+0x115/0x390 kernel/fork.c:1128 exec_mmap+0x50f/0x600 fs/exec.c:1035 begin_new_exec+0x7fb/0x1180 fs/exec.c:1293 load_elf_binary+0x9af/0x2910 fs/binfmt_elf.c:1001 search_binary_handler fs/exec.c:1742 [inline] exec_binprm fs/exec.c:1783 [inline] bprm_execve+0xa8d/0x1740 fs/exec.c:1852 do_execveat_common+0x504/0x6b0 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: 0033:0x7ff62cd53107 Code: Unable to access opcode bytes at RIP 0x7ff62cd530dd. RSP: 002b:00007ffd53c2c7b8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000055772a7b7078 RCX: 00007ff62cd53107 RDX: 000055772a7b70a0 RSI: 000055772a7b7078 RDI: 000055772a7b7130 RBP: 000055772a7b7130 R08: 00007ffd53c30e14 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055772a7b70a0 R13: 00007ff62cf18e8b R14: 000055772a7b70a0 R15: 0000000000000000