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From: "featherrain26 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug demangler/98886] New: stack overflow in cxxfilt, demangle_type,  rust-demangle.c:854
Date: Fri, 29 Jan 2021 12:04:25 +0000	[thread overview]
Message-ID: <bug-98886-4@http.gcc.gnu.org/bugzilla/> (raw)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98886

            Bug ID: 98886
           Summary: stack overflow in cxxfilt, demangle_type,
                    rust-demangle.c:854
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: demangler
          Assignee: unassigned at gcc dot gnu.org
          Reporter: featherrain26 at gmail dot com
  Target Milestone: ---

Created attachment 50082
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50082&action=edit
POC

Hi, there.

There is a stack overflow in the newest version(2eda57ef) of cxxfilt,
rust-demangle.c:854 related to path demangling, which directly causes a
segmentation fault.

To reproduce, run
cxxfilt < poc

Here is the trace reported by ASAN:
==61128==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc223e6fa8 (pc
0x000000970f57 bp 0x000000000005 sp 0x7ffc223e6f80 T0)
     #0 0x970f56 in demangle_type ../../libiberty/rust-demangle.c:854
     #1 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #2 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #3 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #4 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #5 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #6 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
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     #8 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #9 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
     #10 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024
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     #251 0x971873 in demangle_type ../../libiberty/rust-demangle.c:1024

 SUMMARY: AddressSanitizer: stack-overflow ../../libiberty/rust-demangle.c:854
demangle_type
 ==61128==ABORTING

             reply	other threads:[~2021-01-29 12:04 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-29 12:04 featherrain26 at gmail dot com [this message]
2021-12-27  8:23 ` [Bug demangler/98886] " pinskia at gcc dot gnu.org
2021-12-27  8:23 ` pinskia at gcc dot gnu.org
2021-12-27  8:24 ` pinskia at gcc dot gnu.org
2021-12-27  8:24 ` pinskia at gcc dot gnu.org
2021-12-27  8:24 ` pinskia at gcc dot gnu.org
2021-12-27  8:24 ` pinskia at gcc dot gnu.org
2021-12-27  8:25 ` pinskia at gcc dot gnu.org
2021-12-27  8:25 ` pinskia at gcc dot gnu.org
2021-12-27  8:25 ` pinskia at gcc dot gnu.org
2022-01-26 15:32 ` nickc at gcc dot gnu.org
2022-01-31 14:33 ` cvs-commit at gcc dot gnu.org
2022-02-01 10:58 ` nickc at gcc dot gnu.org
2022-04-08 14:51 ` hp at gcc dot gnu.org
2022-10-04 17:02 ` pinskia at gcc dot gnu.org

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