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From: "gcc at pauldreik dot se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/110862] New: format out of bands read on format string "{0:{0}"
Date: Mon, 31 Jul 2023 15:18:55 +0000	[thread overview]
Message-ID: <bug-110862-4@http.gcc.gnu.org/bugzilla/> (raw)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110862

            Bug ID: 110862
           Summary: format out of bands read on format string "{0:{0}"
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gcc at pauldreik dot se
  Target Milestone: ---

The following program with an incorrect format string causes an out of bounds
read when compiled with gcc 13.2:

#include <cstdio>
#include <format>

int main() {
    unsigned short v = 0;
    std::puts(std::vformat("{0:{0}", std::make_format_args(v)).c_str());
}

I expected an exception to be thrown.

Link to reproducer: 
https://godbolt.org/z/WrqxGE1jG

             reply	other threads:[~2023-07-31 15:18 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-31 15:18 gcc at pauldreik dot se [this message]
2023-08-01  1:21 ` [Bug libstdc++/110862] " hewillk at gmail dot com
2023-08-01  7:50 ` gcc at pauldreik dot se
2023-08-01 13:15 ` redi at gcc dot gnu.org
2023-08-03  8:04 ` [Bug libstdc++/110862] format out of bounds " redi at gcc dot gnu.org
2023-08-07 21:12 ` cvs-commit at gcc dot gnu.org
2023-08-08 16:13 ` cvs-commit at gcc dot gnu.org
2023-08-08 16:14 ` redi at gcc dot gnu.org

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