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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clan7.0.1 does not apply -D_FORTIFY_SOURCE=2"
href="https://bugs.llvm.org/show_bug.cgi?id=43114">43114</a>
</td>
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<tr>
<th>Summary</th>
<td>Clan7.0.1 does not apply -D_FORTIFY_SOURCE=2
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>7.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>Vikas.Pandey2@harman.com
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>echo $CC
aarch64-poky-linux-musl-clang -mlittle-endian
--sysroot=/data/home/user-name/work/toolchain/install_clang/sysroots/aarch64-poky-linux-musl
main.c file content:
---------------------
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[]) {
char buffer[8];
strcpy(buffer, argv[0]);
puts(buffer);
return 0;
}
$CC -O2 -D_FORTIFY_SOURCE=2 main.c -o main.o
./checksec.sh -f main.o
RELRO STACK CANARY NX PIE
RPATH RUNPATH FORTIFY Fortified Fortifiable FILE
Partial RELRO Canary found NX enabled PIE enabled No RPATH No
RUNPATH Yes 0 2 main.o
root@b1:~/usb_drive# ./main.o
./main.o
Segmentation fault
Expected : ---
./main.o
*** buffer overflow detected ***: ./main.o terminated
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7320f)[0x7f630b4a120f]
/lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7f630b5244e7]
/lib/x86_64-linux-gnu/libc.so.6(+0xf4700)[0x7f630b522700]
./fortify_example[0x4005ba]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f630b44fb45]
./fortify_example[0x4004c9]
======= Memory map: ========
00400000-00401000 r-xp 00000000 fb:01 391109
/tmp/main.o
[... blah blah blah ...]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]</pre>
</div>
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