dm: reject trailing characters in sccanf input

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / md / dm-flakey.c

diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index b280c433e4a08196c0fe3d5166d9fb9f0879704f..ac49c01f1a44bc6264ab50fcb1f7ba34bf271346 100644 (file)
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -160,6 +160,7 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv)
        unsigned long long tmpll;
        struct dm_arg_set as;
        const char *devname;
+       char dummy;
 
        as.argc = argc;
        as.argv = argv;
@@ -178,7 +179,7 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 
        devname = dm_shift_arg(&as);
 
-       if (sscanf(dm_shift_arg(&as), "%llu", &tmpll) != 1) {
+       if (sscanf(dm_shift_arg(&as), "%llu%c", &tmpll, &dummy) != 1) {
                ti->error = "Invalid device sector";
                goto bad;
        }