Bug#876973: clang-4.0: -fsanitize=address + -lc = segmentation fault

[Jakub Wilk]

Package: clang-4.0
Version: 1:4.0.1-3

When you build a program with AddressSanitizer and link it explicitly 
with libc, the program segfaults immediately:

   $ cat hello.c
   #include <stdio.h>
   int main(int argc, char **argv)
   {
       printf("Hello world!\n");
       return 0;
   }

   $ clang-4.0 -fsanitize=address hello.c -o hello -lc

   $ ./hello
   Segmentation fault

Backtrace:

   #0  0xf7fe4f5a in elf_machine_rel (skip_ifunc=<optimized out>, reloc_addr_arg=0x81a5530, version=<optimized out>, sym=0x804b97c, reloc=0x805d28c, map=0xf7ffd920) at ../sysdeps/i386/dl-machine.h:316
   #1  elf_dynamic_do_Rel (skip_ifunc=<optimized out>, lazy=<optimized out>, nrelative=<optimized out>, relsize=<optimized out>, reladdr=<optimized out>, map=<optimized out>) at do-rel.h:137
   #2  _dl_relocate_object (scope=<optimized out>, reloc_mode=<optimized out>, consider_profiling=<optimized out>) at dl-reloc.c:259
   #3  0xf7fdcb2f in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:2204
   #4  0xf7fefe8b in _dl_sysdep_start (start_argptr=0xffffd780, dl_main=0xf7fdabe0 <dl_main>) at ../elf/dl-sysdep.c:249
   #5  0xf7fda792 in _dl_start_final (arg=0xffffd780) at rtld.c:414
   #6  _dl_start (arg=<optimized out>) at rtld.c:520
   #7  0xf7fd9a27 in _start () from /lib/ld-linux.so.2

NB, this works with GCC:

   $ gcc-7 -fsanitize=address hello.c -o hello -lc

   $ ./hello
   Hello world!


-- System Information:
Architecture: i386

Versions of packages clang-4.0 depends on:
ii  libc6                    2.24-17
ii  libclang1-4.0            1:4.0.1-3
ii  libgcc1                  1:7.2.0-7
ii  libjsoncpp1              1.7.4-3
ii  libllvm4.0               1:4.0.1-3
ii  libstdc++6               7.2.0-7
ii  libstdc++-7-dev          7.2.0-7
ii  libgcc-7-dev             7.2.0-7
ii  libobjc-7-dev            7.2.0-7
ii  libclang-common-4.0-dev  1:4.0.1-3
ii  libc6-dev                2.24-17
ii  binutils                 2.29.1-3

Versions of packages clang-4.0 recommends:
ii  llvm-4.0-dev  1:4.0.1-3
ii  python        2.7.14-1

-- 
Jakub Wilk