-Patch for https://github.com/relan/exfat/issues/5
-See also:
-https://blog.fuzzing-project.org/25-Heap-overflow-and-endless-loop-in-exfatfsck-exfat-utils.html
-Index: exfat-utils/libexfat/mount.c
-===================================================================
---- exfat-utils.orig/libexfat/mount.c
-+++ exfat-utils/libexfat/mount.c
-@@ -208,6 +208,23 @@ int exfat_mount(struct exfat* ef, const
- exfat_error("exFAT file system is not found");
- return -EIO;
- }
-+ /* sector cannot be smaller than 512 bytes */
-+ if (ef->sb->sector_bits < 9)
-+ {
-+ exfat_close(ef->dev);
-+ exfat_error("too small sector size: 2^%hhd", ef->sb->sector_bits);
-+ free(ef->sb);
-+ return -EIO;
-+ }
-+ /* officially exFAT supports cluster size up to 32 MB */
-+ if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25)
-+ {
-+ exfat_close(ef->dev);
-+ exfat_error("too big cluster size: 2^(%hhd+%hhd)",
-+ ef->sb->sector_bits, ef->sb->spc_bits);
-+ free(ef->sb);
-+ return -EIO;
-+ }
- ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb));
- if (ef->zero_cluster == NULL)
- {
-@@ -242,16 +259,6 @@ int exfat_mount(struct exfat* ef, const
- free(ef->sb);
- return -EIO;
- }
-- /* officially exFAT supports cluster size up to 32 MB */
-- if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25)
-- {
-- free(ef->zero_cluster);
-- exfat_close(ef->dev);
-- exfat_error("too big cluster size: 2^%d",
-- (int) ef->sb->sector_bits + (int) ef->sb->spc_bits);
-- free(ef->sb);
-- return -EIO;
-- }
- if (le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb) >
- exfat_get_size(ef->dev))
- {