[prev in list] [next in list] [prev in thread] [next in thread]
List: glibc-cvs
Subject: [glibc] wordexp: handle overflow in positional parameter number (bug 28011)
From: Andreas Schwab via Glibc-cvs <glibc-cvs () sourceware ! org>
Date: 2021-06-27 17:37:00
Message-ID: 20210627173700.79CF8385742A () sourceware ! org
[Download RAW message or body]
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c
commit 5adda61f62b77384718b4c0d8336ade8f2b4b35c
Author: Andreas Schwab <schwab@linux-m68k.org>
Date: Fri Jun 25 15:02:47 2021 +0200
wordexp: handle overflow in positional parameter number (bug 28011)
Use strtoul instead of atoi so that overflow can be detected.
Diff:
---
posix/wordexp-test.c | 1 +
posix/wordexp.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c
index f93a546d7e..9df02dbbb3 100644
--- a/posix/wordexp-test.c
+++ b/posix/wordexp-test.c
@@ -183,6 +183,7 @@ struct test_case_struct
{ 0, NULL, "$var", 0, 0, { NULL, }, IFS },
{ 0, NULL, "\"\\n\"", 0, 1, { "\\n", }, IFS },
{ 0, NULL, "", 0, 0, { NULL, }, IFS },
+ { 0, NULL, "${1234567890123456789012}", 0, 0, { NULL, }, IFS },
/* Flags not already covered (testit() has special handling for these) */
{ 0, NULL, "one two", WRDE_DOOFFS, 2, { "one", "two", }, IFS },
diff --git a/posix/wordexp.c b/posix/wordexp.c
index bcbe96e48d..1f3b09f721 100644
--- a/posix/wordexp.c
+++ b/posix/wordexp.c
@@ -1399,7 +1399,7 @@ envsubst:
/* Is it a numeric parameter? */
else if (isdigit (env[0]))
{
- int n = atoi (env);
+ unsigned long n = strtoul (env, NULL, 10);
if (n >= __libc_argc)
/* Substitute NULL. */
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic