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asan: readelf: stack buffer overflow

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* readelf.c (print_dynamic_symbol): Don't sprintf to buffer to
	find string length.
This commit is contained in:
Alan Modra
2020-07-06 09:00:29 +09:30
parent c56374d118
commit ddb43bab17
2 changed files with 7 additions and 2 deletions
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5
binutils/ChangeLog
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@ -1,3 +1,8 @@
2020-07-06 Alan Modra <amodra@gmail.com>
* readelf.c (print_dynamic_symbol): Don't sprintf to buffer to
find string length.
2020-07-04 Nick Clifton <nickc@redhat.com> 2020-07-04 Nick Clifton <nickc@redhat.com>
* configure: Regenerate. * configure: Regenerate.

4
binutils/readelf.c
View File

@ -12091,9 +12091,9 @@ print_dynamic_symbol (Filedata *filedata, unsigned long si,
int len_avail = 21; int len_avail = 21;
if (! do_wide && version_string != NULL) if (! do_wide && version_string != NULL)
{ {
char buffer[256]; char buffer[16];
len_avail -= sprintf (buffer, "@%s", version_string); len_avail -= 1 + strlen (version_string);
if (sym_info == symbol_undefined) if (sym_info == symbol_undefined)
len_avail -= sprintf (buffer," (%d)", vna_other); len_avail -= sprintf (buffer," (%d)", vna_other);