libcdio.git - libcdio

diff --git a/lib/iso9660/iso9660_fs.c b/lib/iso9660/iso9660_fs.c
index 5cd1f759..4e261044 100644
--- a/lib/iso9660/iso9660_fs.c
+++ b/lib/iso9660/iso9660_fs.c

@@ -1509,6 +1509,16 @@ iso9660_fs_readdir (CdIo_t *p_cdio, const char psz_path[])

}

{

+ // **Fix for overflow on 32-bit systems**

+ //

+ // uint32_t has a limited maximum value, and if p_stat->total_size (the total

+ // size of the directory) is very large, the calculation might exceed this limit.

+

+ if (p_stat->total_size > SIZE_MAX / ISO_BLOCKSIZE) {

+ cdio_warn("Total size is too large");

+ iso9660_stat_free(p_stat);

+ return NULL;

+ }

unsigned offset = 0;

uint8_t *_dirbuf = NULL;

uint32_t blocks = CDIO_EXTENT_BLOCKS(p_stat->total_size);

@@ -1606,6 +1616,16 @@ iso9660_ifs_readdir (iso9660_t *p_iso, const char psz_path[])

}

{

+ // **Fix for overflow on 32-bit systems**

+ //

+ // uint32_t has a limited maximum value, and if p_stat->total_size (the total

+ // size of the directory) is very large, the calculation might exceed this limit.

+

+ if (p_stat->total_size > SIZE_MAX / ISO_BLOCKSIZE) {

+ cdio_warn("Total size is too large");

+ iso9660_stat_free(p_stat);

+ return NULL;

+ }

long int ret;

unsigned offset = 0;

uint8_t *_dirbuf = NULL;