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From: "sanjayr at ymail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug demangler/104186] New: Stack overflow in demangle_type() -> print_str() in libiberty/rust-demangle.c:869, cxxfilt Date: Sat, 22 Jan 2022 15:20:24 +0000 [thread overview] Message-ID: <bug-104186-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104186 Bug ID: 104186 Summary: Stack overflow in demangle_type() -> print_str() in libiberty/rust-demangle.c:869, cxxfilt Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: demangler Assignee: unassigned at gcc dot gnu.org Reporter: sanjayr at ymail dot com Target Milestone: --- Created attachment 52268 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52268&action=edit Commandline input for the crash (cxxfilt < PoV) Hello, While evaluating our new fuzzer on cxxfilt, we found several stack overflows in libiberty/rust-demangle.c. This issue is specific to a stack overflow in demangle_type(), which internally called a macro PRINT() that unfolds in calling to print_str(). Looks like, the copy operation in this function does not check buf length properly. We compiled the utility (binutils cxxfilt) with ASAN. Comandline: cxxfilt < input_file (PoV that is attached) ASan outupt: =================================== status: 1 sanitizer: ASAN error class: stack-overflow location: __interceptor_strlen.part.0 in /home/xyzz/build/llvm_tools/llvm-11.0.0.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:370:31 backtrace: #0 46ec57 __interceptor_strlen.part.0 in /home/xyzz/build/llvm_tools/llvm-11.0.0.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:370:31 #1 857cb1 demangle_type in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:869:7 #3 853d83 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:747:7 #4 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #5 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #6 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #7 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #8 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #9 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #10 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #11 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #12 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #13 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #14 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #15 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #16 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #17 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #18 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #19 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #20 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #21 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #22 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #23 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #24 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #25 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #26 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #27 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #28 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 #29 8542e4 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:774:11 #30 853e11 demangle_path in /home/xyzz/MyProject/remote_fuzz_suite/target_src/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:751:11 ..... ....... ==================================
next reply other threads:[~2022-01-22 15:20 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-22 15:20 sanjayr at ymail dot com [this message] 2022-01-22 17:54 ` [Bug demangler/104186] " pinskia at gcc dot gnu.org
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