Merge pull request #278 from roykuper13/validate-lfs-cfg-sizesv2.1.2

lfs: Validate lfs-cfg sizes before performing any arithmetic logics with them

1 files changed, 6 insertions, 0 deletions

diff --git a/lfs.c b/lfs.c
index d9e3ffb..e2ab1e5 100644
--- a/lfs.c
+++ b/lfs.c
@@ -3369,6 +3369,12 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
     lfs->cfg = cfg;
     int err = 0;
 
+    // validate that the lfs-cfg sizes were initiated properly before
+    // performing any arithmetic logics with them
+    LFS_ASSERT(lfs->cfg->read_size != 0);
+    LFS_ASSERT(lfs->cfg->prog_size != 0);
+    LFS_ASSERT(lfs->cfg->cache_size != 0);
+
     // check that block size is a multiple of cache size is a multiple
     // of prog and read sizes
     LFS_ASSERT(lfs->cfg->cache_size % lfs->cfg->read_size == 0);