Author: markj
Date: Tue Nov 3 03:29:35 2015
New Revision: 290320
URL: https://svnweb.freebsd.org/changeset/base/290320
Log:
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.
Reviewed by: kib
MFC after: 1 week
Modified:
head/sys/kern/link_elf.c
Modified: head/sys/kern/link_elf.c
==============================================================================
--- head/sys/kern/link_elf.c Tue Nov 3 00:54:14 2015 (r290319)
+++ head/sys/kern/link_elf.c Tue Nov 3 03:29:35 2015 (r290320)
@@ -1594,6 +1594,10 @@ 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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