Author: markj
Date: Fri Nov 13 01:25:02 2015
New Revision: 290737
URL: https://svnweb.freebsd.org/changeset/base/290737
Log:
MFC r290320:
Have elf_lookup() return an error if the specified non-weak symbol could
not be found. Otherwise, relocations against such symbols will be silently
ignored instead of causing an error to be raised.
Modified:
stable/10/sys/kern/link_elf.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/kern/link_elf.c
==============================================================================
--- stable/10/sys/kern/link_elf.c Fri Nov 13 01:03:59 2015
(r290736)
+++ stable/10/sys/kern/link_elf.c Fri Nov 13 01:25:02 2015
(r290737)
@@ -1544,6 +1544,10 @@ elf_lookup(linker_file_t lf, Elf_Size sy
}
addr = ((Elf_Addr)linker_file_lookup_symbol(lf, symbol, deps));
+ if (addr == 0 && ELF_ST_BIND(sym->st_info) != STB_WEAK) {
+ *res = 0;
+ return (EINVAL);
+ }
if (elf_set_find(&set_pcpu_list, addr, &start, &base))
addr = addr - start + base;
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