Changeset 5178ee2 in mainline for uspace/srv/fs/fat/fat_fat.c

Timestamp:

2010-02-10T19:34:05Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

24a2517

Parents:

16fc3c9

Message:

Harden _fat_get_block() against attempts to read a zero-length file.

File:

• uspace/srv/fs/fat/fat_fat.c (modified) (1 diff)

uspace/srv/fs/fat/fat_fat.c

@@ -147 +147 @@
         fat_cluster_t lastc;
         int rc;
+
+        /*
+         * This function can only operate on non-zero length files.
+         */
+        if (firstc == FAT_CLST_RES0)
+                return ELIMIT;
 
         bps = uint16_t_le2host(bs->bps);