[nasm:master] BR3392274: output: Elf -- Don't crash on erronious syntax

[nasm-bot f. C. G. <gor...@gm...>]

Commit-ID:  d0293d339272af18b2258d702d3e1e44c0501292
Gitweb:     http://repo.or.cz/w/nasm.git?a=commitdiff;h=d0293d339272af18b2258d702d3e1e44c0501292
Author:     Cyrill Gorcunov <gor...@gm...>
AuthorDate: Sat, 15 Feb 2014 18:40:12 +0400
Committer:  Cyrill Gorcunov <gor...@gm...>
CommitDate: Sat, 15 Feb 2014 18:40:12 +0400

BR3392274: output: Elf -- Don't crash on erronious syntax

Elf align section attribute requires syntax "align=value",
but in case if '=' is missed we pass nil pointer into
atoi function which cause libc to crash.

Signed-off-by: Cyrill Gorcunov <gor...@gm...>


---
 output/outelf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/output/outelf.c b/output/outelf.c
index 9ec0035..bfbf625 100644
--- a/output/outelf.c
+++ b/output/outelf.c
@@ -76,7 +76,7 @@ void section_attrib(char *name, char *attr, int pass,
         return;
 
     while ((opt = nasm_opt_val(opt, &val, &next))) {
-        if (!nasm_stricmp(opt, "align")) {
+        if (!nasm_stricmp(opt, "align") && val) {
             *align = atoi(val);
             if (*align == 0) {
                 *align = SHA_ANY;