The test program src/test-nextquota.c relies on atoi() to convert a
string to an *unsigned* int. If the string represents an integer
which is greater than INT_MAX, it is undefined how atoi(3) works, and
it turns out that:
uint id = atoi("2147483649");
results in id == 2147483649 on x86_64, and id == 2147483647 on a
32-bit x86 platform.
So use strtoul(3) instead, which is portable and technically correct.
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Cc: Eric Sandeen <sandeen@xxxxxxxxxx>
---
src/test-nextquota.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/test-nextquota.c b/src/test-nextquota.c
index a2bbad9..6eec1f9 100644
--- a/src/test-nextquota.c
+++ b/src/test-nextquota.c
@@ -74,6 +74,7 @@ int main(int argc, char *argv[])
int verbose = 0;
uint id = 0, idflag = 0;
char *device = NULL;
+ char *tmp;
struct nextdqblk dqb;
struct fs_disk_quota xqb;
@@ -92,7 +93,11 @@ int main(int argc, char *argv[])
typeflag++;
break;
case 'i':
- id = atoi(optarg);
+ id = (int) strtoul(optarg, &tmp, 0);
+ if (*tmp) {
+ fprintf(stderr, "Bad id: %s\n", optarg);
+ exit(1);
+ }
idflag++;
break;
case 'd':
--
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
