[PATCH] quota: fix generic/244 on 32-bit platforms

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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



[Index of Archives]     [Reiser Filesystem Development]     [Ceph FS]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite National Park]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Media]

  Powered by Linux