[llvm-bugs] [Bug 40023] New: format security warnings not generated for printf calls in template

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Dec 14 07:24:06 PST 2018


https://bugs.llvm.org/show_bug.cgi?id=40023

            Bug ID: 40023
           Summary: format security warnings not generated for printf
                    calls in template
           Product: clang
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: yshuiv7 at gmail.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

Code example:

#include <string>
#include <cstdio>
template <typename ...Args>
void p(const char *fmt, const Args & ... args) {
    std::printf(fmt, args...);
}

int main() {
    //p("asdfasdf"); // warning generated for this one
    p("%d", 1); // but not this one
}

compiler explorer link: https://godbolt.org/z/O8mCQj

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