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CFI: Make lto and linker-plugin-lto work the same for compiler_builtins

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 145368

#145368 In rust-lang/rust;

· rcvalle opened on Aug 13, 2025

· 9/10

7



CFI: Fix types that implement Fn, FnMut, or FnOnce

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 144936

#144936 In rust-lang/rust;

· rcvalle opened on Aug 5, 2025

· Changes requested

· 9/10

16



Invalid CFI failure for and indirect call through a Box<dyn Fn()>

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

Status: Open.

#144641 In rust-lang/rust;

· 1c3t3a opened on Jul 29, 2025

1

3 comments



LLVM CFI integration being undocumented complicates further codegen dev

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#143751 In rust-lang/rust;

· workingjubilee opened on Jul 10, 2025

3 comments



rustc-LLVM ERROR of ControlFlowIntegrit

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

I-crashIssue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

S-has-mcveStatus: A Minimal Complete and Verifiable Example has been found for this issueStatus: A Minimal Complete and Verifiable Example has been found for this issue

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#142284 In rust-lang/rust;

· zsdfbb opened on Jun 10, 2025

2

10 comments

fn_cast! macro

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-rust-for-linuxRelevant for the Rust-for-Linux projectRelevant for the Rust-for-Linux project

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

I-lang-radarItems that are on lang's radar and will need eventual work or consideration.Items that are on lang's radar and will need eventual work or consideration.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#140803 In rust-lang/rust;

· Darksonn opened on May 8, 2025

32 comments

Tracking Issue for -Zsanitize-kcfi-arity

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-rust-for-linuxRelevant for the Rust-for-Linux projectRelevant for the Rust-for-Linux project

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#138311 In rust-lang/rust;

· ojeda opened on Mar 10, 2025

3 comments



ICE: cfi: encode_ty_name: unexpected GlobalAsm

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#138262 In rust-lang/rust;

· matthiaskrgr opened on Mar 9, 2025

Can CFI be made compatible with type erasure schemes?

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#128728 In rust-lang/rust;

· RalfJung opened on Aug 6, 2024

28 comments

CFI: segfault with debuginfo=2 since llvm18

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.)Area: Debugging information in compiled programs (DWARF, PDB, etc.)

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

I-crashIssue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#123062 In rust-lang/rust;

· matthiaskrgr opened on Mar 25, 2024

3 comments

OSX CFI produces relocation issues

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

O-macosOperating system: macOSOperating system: macOS

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#122848 In rust-lang/rust;

· maurer opened on Mar 21, 2024

ICE: CFI: encode_const: unexpected type '[[usize; 4]; 4]'

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#114158 In rust-lang/rust;

· matthiaskrgr opened on Jul 28, 2023

2 comments



ice: cfi: LLVM ERROR with polymorphic paths

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#112376 In rust-lang/rust;

· matthiaskrgr opened on Jun 7, 2023

2 comments



ICE: cfi: TAIT transform_ty: unexpected Alias(Opaque`

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

F-type_alias_impl_trait`#[feature(type_alias_impl_trait)]``#[feature(type_alias_impl_trait)]`

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#111206 In rust-lang/rust;

· matthiaskrgr opened on May 4, 2023

10 comments



sanitizer=cfi does not work with Clto=thin ?

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

Status: Open.

#111183 In rust-lang/rust;

· matthiaskrgr opened on May 4, 2023

3 comments



LLVM ERROR: Broken module with -Cdebuginfo=2 -Zsanitizer=cfi -Clto

A-control-flow-integrityArea: Control Flow Integrity (CFI) security mitigationArea: Control Flow Integrity (CFI) security mitigation

A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.)Area: Debugging information in compiled programs (DWARF, PDB, etc.)

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-sanitizersArea: Sanitizers for correctness and code qualityArea: Sanitizers for correctness and code quality

C-bugCategory: This is a bug.Category: This is a bug.

E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added.Call for participation: An issue has been fixed and does not reproduce, but no test has been added.

glacierICE tracked in rust-lang/glacier.ICE tracked in rust-lang/glacier.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

PG-exploit-mitigationsProject group: Exploit mitigationsProject group: Exploit mitigations

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#100783 In rust-lang/rust;

· matthiaskrgr opened on Aug 19, 2022

7 comments