http://sourceware.org/bugzilla/show_bug.cgi?id=15106
Bug #: 15106
Summary: Segfault in elf_find_function
Product: binutils
Version: 2.23
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassig...@sourceware.org
ReportedBy: ra.viti...@gmail.com
CC: amo...@gmail.com
Classification: Unclassified
The caching of the last function sym info in elf_find_function causes a
segfault when last_section == section but the pointer to symbols has changed
from the last invocation and func is not a valid pointer anymore.
The following patch fixes this bug:
diff --git a/elf.c b/elf.c
--- a/elf.c
+++ b/elf.c
@@ -7475,6 +7475,7 @@ elf_find_function (bfd *abfd,
const char **functionname_ptr)
{
static asection *last_section;
+ static asymbol **last_symbols;
static asymbol *func;
static const char *filename;
static bfd_size_type func_size;
@@ -7483,6 +7484,7 @@ elf_find_function (bfd *abfd,
return FALSE;
if (last_section != section
+ || last_symbols != symbols
|| func == NULL
|| offset < func->value
|| offset >= func->value + func_size)
@@ -7531,6 +7533,7 @@ elf_find_function (bfd *abfd,
&& size > func_size)))
{
func = sym;
+ last_symbols = symbols;
func_size = size;
low_func = code_off;
--
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