Invalid read of size 4
   at 0x........: main (badrw.c:19)
 Address 0x........ is 4 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

Invalid write of size 4
   at 0x........: main (badrw.c:20)
 Address 0x........ is 4 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

Invalid read of size 2
   at 0x........: main (badrw.c:22)
 Address 0x........ is 4 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

Invalid write of size 2
   at 0x........: main (badrw.c:23)
 Address 0x........ is 4 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

Invalid read of size 1
   at 0x........: main (badrw.c:25)
 Address 0x........ is 1 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

Invalid write of size 1
   at 0x........: main (badrw.c:26)
 Address 0x........ is 1 bytes before a block of size 10 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badrw.c:5)

