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-rw-r--r--libmount/src/context_umount.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libmount/src/context_umount.c b/libmount/src/context_umount.c
index 36ed435cf..17ec1f0a4 100644
--- a/libmount/src/context_umount.c
+++ b/libmount/src/context_umount.c
@@ -150,7 +150,7 @@ static int is_associated_fs(const char *devname, struct libmnt_fs *fs)
int flags = 0;
/* check if it begins with /dev/loop */
- if (strncmp(devname, _PATH_DEV_LOOP, sizeof(_PATH_DEV_LOOP)))
+ if (strncmp(devname, _PATH_DEV_LOOP, sizeof(_PATH_DEV_LOOP) - 1))
return 0;
src = mnt_fs_get_srcpath(fs);