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mkfs-b: Check that blocksize parameter is > 0 and a power of 2.
[libguestfs.git]
/
daemon
/
mkfs.c
diff --git
a/daemon/mkfs.c
b/daemon/mkfs.c
index
6735d24
..
2c3a3cd
100644
(file)
--- a/
daemon/mkfs.c
+++ b/
daemon/mkfs.c
@@
-104,6
+104,11
@@
do_mkfs_b (const char *fstype, int blocksize, const char *device)
const char *extra[2];
char blocksize_s[32];
const char *extra[2];
char blocksize_s[32];
+ if (blocksize <= 0 || !is_power_of_2 (blocksize)) {
+ reply_with_error ("block size must be > 0 and a power of 2");
+ return -1;
+ }
+
snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
extra[0] = "-b";
snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
extra[0] = "-b";