Bug#908109: clang-6.0: AddressSanitizer: SEGV on unknown address ... in _dl_get_tls_static_info

[Jakub Wilk]

* Sylvestre Ledru <sylvestre at debian.org>, 2018-09-06, 10:38:
>on my system (amd64)
>
>$ ./hello
>Hello world!

Right, I can't reproduce the bug on amd64 either.

>What happens with
>
>----
>
>#include <stdlib.h>
>int main() {
>  char *x = (char*)malloc(10 * sizeof(char*));
>  free(x);
>  return x[5];
>}
>
>---
>
>$ clang-6.0 -o foo -fsanitize=address -O1  -g  foo.c
>
>$ ./foo

I works as expected on amd64; but on i386 I get this again:

   $ ./foo
   AddressSanitizer:DEADLYSIGNAL
   =================================================================
   ==2507==ERROR: AddressSanitizer: SEGV on unknown address 0xf7fae430 (pc 0xf7fae444 bp 0xff92753c sp 0xff9274fc T16777215)
   ==2507==The signal is caused by a WRITE memory access.
       #0 0xf7fae443  (/lib/ld-linux.so.2+0x12443)
       #1 0x8159e89  (/home/jwilk/foo+0x8159e89)
       #2 0x813ed32  (/home/jwilk/foo+0x813ed32)
       #3 0xf7fabeda  (/lib/ld-linux.so.2+0xfeda)
       #4 0xf7f9d299  (/lib/ld-linux.so.2+0x1299)

   AddressSanitizer can not provide additional info.
   SUMMARY: AddressSanitizer: SEGV (/lib/ld-linux.so.2+0x12443)
   ==2507==ABORTING

-- 
Jakub Wilk