[JFFS2] Better fix for all-zero node headers
No need to check for all-zero header since the header cannot
be zero due to other checks.
Replace the all-zero header check in readinode.c with a
check for the magic word.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 49d4b0a..b09fa23 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1054,10 +1054,10 @@
jffs2_mark_node_obsolete(c, ref);
goto cont;
}
- /* Due to poor choice of crc32 seed, an all-zero node will have a correct CRC */
- if (!je32_to_cpu(node->u.hdr_crc) && !je16_to_cpu(node->u.nodetype) &&
- !je16_to_cpu(node->u.magic) && !je32_to_cpu(node->u.totlen)) {
- JFFS2_NOTICE("All zero node header at %#08x.\n", ref_offset(ref));
+ if (je16_to_cpu(node->u.magic) != JFFS2_MAGIC_BITMASK) {
+ /* Not a JFFS2 node, whinge and move on */
+ JFFS2_NOTICE("Wrong magic bitmask 0x%04x in node header at %#08x.\n",
+ je16_to_cpu(node->u.magic), ref_offset(ref));
jffs2_mark_node_obsolete(c, ref);
goto cont;
}