I just ran the newest pahole release on the Linux kernel compiled with clang plus LTO (link-time optimizations) and got a segmentation fault. I placed the vmlinux file at the following URL: https://drive.google.com/file/d/1KmrUFLBl42U1VZ3elp6zTlpK7rB7o4Jq/view?usp=sharing The DWARF information generated by clang + LTO is definitely different from a non-LTO build. We've seen issues with it in the past. This however looks like a new issue. [Note: I could only share the file with individuals with gmail accounts, so I wasn't able to share it with the "dwarves@xxxxxxxxxxxxxxx" account.] $ pahole -J -V tmp_vmlinux.btf Found per-CPU symbol 'cpu_loops_per_jiffy' at address 0x10000 Found per-CPU symbol 'pmc_prev_left' at address 0x11330 Found per-CPU symbol 'perf_nmi_tstamp' at address 0x11530 Found per-CPU symbol 'bts_ctx' at address 0x12000 Found per-CPU symbol 'insn_buffer' at address 0x15000 Found per-CPU symbol 'pt_ctx' at address 0x15008 Found per-CPU symbol 'kvm_core_conflict' at address 0x150d8 Found per-CPU symbol 'svm_asid' at address 0x150e8 Found per-CPU symbol 'current_vcpu' at address 0x150f8 Found per-CPU symbol 'mmu_lock_acquired_time' at address 0x150f0 Found per-CPU symbol 'cpu_tsc_khz' at address 0x15100 Found per-CPU symbol 'current_vcpu' at address 0x15108 Found per-CPU symbol 'local_vcpu' at address 0x15110 Found per-CPU symbol 'last_nmi_rip' at address 0x15288 Found per-CPU symbol 'nmi_cr2' at address 0x15278 Found per-CPU symbol 'nmi_state' at address 0x15270 Found per-CPU symbol 'nmi_stats' at address 0x15294 Found per-CPU symbol 'swallow_nmi' at address 0x152a4 Found per-CPU symbol 'unhandled_nmi_count' at address 0x15290 Found per-CPU symbol 'update_debug_stack' at address 0x15280 Found per-CPU symbol 'cpu_devices' at address 0x15ab0 Found per-CPU symbol 'bp_per_reg' at address 0x15da0 Found per-CPU symbol 'cpu_debugreg' at address 0x15dc0 Found per-CPU symbol 'is_idle' at address 0x15e00 Found per-CPU symbol 'ssb_state' at address 0x15de8 Found per-CPU symbol 'in_kernel_fpu' at address 0x15e18 Found per-CPU symbol 'debug_stack_addr' at address 0x15e60 Found per-CPU symbol 'samples' at address 0x15ea8 Found per-CPU symbol 'last_mds_flush' at address 0x15f18 Found per-CPU symbol 'mds_core_conflict' at address 0x15ed0 Found per-CPU symbol 'mds_reasons' at address 0x15ee0 Found per-CPU symbol 'mds_sw_flush_buffer' at address 0x15ed8 Found per-CPU symbol 'mds_triggers' at address 0x15f00 Found per-CPU symbol 'mce_next_interval' at address 0x16050 Found per-CPU symbol 'mce_signaled' at address 0x15fa4 Found per-CPU symbol 'mce_timer' at address 0x16028 ... [1759] FUNC arch_setup_additional_pages type_id=1758 [1760] FUNC_PROTO (anon) return=381 args=(1750 bprm, 381 uses_interp) [1761] FUNC compat_arch_setup_additional_pages type_id=1760 [1762] FUNC_PROTO (anon) return=381 args=(382 s) [1763] FUNC vdso_setup type_id=1762 [1764] FUNC_PROTO (anon) return=381 args=(void) [1765] FUNC init_vdso type_id=1764 Segmentation fault -bw
