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[JFFS2] Calculate CRC check starting point correctly 

When data starts from the beginning of NAND page, 'len' must be zero, not
c->wbuf_page.

Thanks to Zoltan Sogor for reporting this problem.

Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Artem B. Bityutskiy 2005-08-17 15:57:43 +01:00 committed by Thomas Gleixner
parent 8d5df40954
commit 280562b210
2 changed files with 9 additions and 8 deletions
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5
fs/jffs2/nodelist.c
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: nodelist.c,v 1.110 2005/08/17 14:13:45 dedekind Exp $
* $Id: nodelist.c,v 1.111 2005/08/17 14:57:39 dedekind Exp $
*
*/
@ -413,7 +413,8 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
/* Calculate how many bytes were already checked */
ofs = ref_offset(ref) + sizeof(struct jffs2_raw_inode);
len = ofs & (c->wbuf_pagesize - 1);
len = c->wbuf_pagesize - len;
if (likely(len))
len = c->wbuf_pagesize - len;
if (len >= tn->csize) {
JFFS2_DBG_READINODE("no need to check node at %#08x, data length %u, data starts at %#08x - it has already been checked.\n",

10
fs/jffs2/readinode.c
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: readinode.c,v 1.140 2005/08/17 13:46:23 dedekind Exp $
* $Id: readinode.c,v 1.141 2005/08/17 14:57:39 dedekind Exp $
*
*/
@ -272,9 +272,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
buf = (unsigned char *)rd + sizeof(*rd);
/* len will be the read data length */
len = min_t(uint32_t, rdlen - sizeof(*rd), csize);
tn->partial_crc = crc32(0, buf, len);
if (len)
tn->partial_crc = crc = crc32(0, buf, len);
JFFS2_DBG_READINODE("Calculates CRC (%#08x) for %d bytes, csize %d\n", tn->partial_crc, len, csize);
/* If we actually calculated the whole data CRC
* and it is wrong, drop the node. */
@ -327,8 +327,8 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
else // normal case...
tn->fn->size = je32_to_cpu(rd->dsize);
JFFS2_DBG_READINODE("dnode @%08x: ver %u, offset %#04x, dsize %#04x\n",
ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize));
JFFS2_DBG_READINODE("dnode @%08x: ver %u, offset %#04x, dsize %#04x, csize %#04x\n",
ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize), csize);
jffs2_add_tn_to_tree(tn, tnp);