Author: markj
Date: Thu Jan 5 02:33:10 2017
New Revision: 311348
URL: https://svnweb.freebsd.org/changeset/base/311348
Log:
Add a reasonable bound on the symbol table index size.
Modified:
head/lib/libproc/proc_sym.c
Modified: head/lib/libproc/proc_sym.c
==============================================================================
--- head/lib/libproc/proc_sym.c Thu Jan 5 02:04:53 2017 (r311347)
+++ head/lib/libproc/proc_sym.c Thu Jan 5 02:33:10 2017 (r311348)
@@ -143,10 +143,12 @@ load_symtab(Elf *e, struct symtab *symta
if (scn == NULL)
return (-1);
- if ((symtab->data = elf_getdata(scn, NULL)) == NULL)
+ nsyms = shdr.sh_size / shdr.sh_entsize;
+ if (nsyms > (1 << 20))
return (-1);
- nsyms = shdr.sh_size / shdr.sh_entsize;
+ if ((symtab->data = elf_getdata(scn, NULL)) == NULL)
+ return (-1);
symtab->index = calloc(nsyms, sizeof(u_int));
if (symtab->index == NULL)
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