X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fjffs2%2Fscan.c;h=272872d27fd53242cf50b487c330e112c4b59d06;hb=d67c6f869c0a7f275689855161c93d714197e052;hp=59dd408e54326bb3b45cc746d326dee0cb943df0;hpb=f2d40cd92c5604a868b22c44a7858206ae4fcf35;p=linux-2.6

diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 59dd408e54..272872d27f 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -101,7 +101,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
 		if (!ret && pointlen < c->mtd->size) {
 			/* Don't muck about if it won't let us point to the whole flash */
 			D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", pointlen));
-			c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
+			c->mtd->unpoint(c->mtd, flashbuf, 0, pointlen);
 			flashbuf = NULL;
 		}
 		if (ret)
@@ -1004,6 +1004,7 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 {
 	struct jffs2_full_dirent *fd;
 	struct jffs2_inode_cache *ic;
+	uint32_t checkedlen;
 	uint32_t crc;
 	int err;
 
@@ -1024,12 +1025,18 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 
 	pseudo_random += je32_to_cpu(rd->version);
 
-	fd = jffs2_alloc_full_dirent(rd->nsize+1);
+	/* Should never happen. Did. (OLPC trac #4184)*/
+	checkedlen = strnlen(rd->name, rd->nsize);
+	if (checkedlen < rd->nsize) {
+		printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars\n",
+		       ofs, checkedlen);
+	}
+	fd = jffs2_alloc_full_dirent(checkedlen+1);
 	if (!fd) {
 		return -ENOMEM;
 	}
-	memcpy(&fd->name, rd->name, rd->nsize);
-	fd->name[rd->nsize] = 0;
+	memcpy(&fd->name, rd->name, checkedlen);
+	fd->name[checkedlen] = 0;
 
 	crc = crc32(0, fd->name, rd->nsize);
 	if (crc != je32_to_cpu(rd->name_crc)) {
@@ -1055,7 +1062,7 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 	fd->next = NULL;
 	fd->version = je32_to_cpu(rd->version);
 	fd->ino = je32_to_cpu(rd->ino);
-	fd->nhash = full_name_hash(fd->name, rd->nsize);
+	fd->nhash = full_name_hash(fd->name, checkedlen);
 	fd->type = rd->type;
 	jffs2_add_fd_to_list(c, fd, &ic->scan_dents);