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[MTD] NAND: nand_write_ecc memory and OOB corruption 

Nathan Roberts noticed the nand_write_ecc index into oobbuf goes out of
bounds when crossing an erase block boundary, causing incorrect OOB data
to be written and corrupting memory.  Reset the index to zero after
re-preparing oobbuf for a new erase block.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Todd Poynor 2005-11-05 03:21:15 +00:00 committed by Thomas Gleixner
parent 49196f3332
commit 868801e561
1 changed files with 1 additions and 0 deletions
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1
drivers/mtd/nand/nand_base.c
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@ -1722,6 +1722,7 @@ static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
startpage = page; startpage = page;
oobbuf = nand_prepare_oobbuf (mtd, eccbuf, oobsel, oobbuf = nand_prepare_oobbuf (mtd, eccbuf, oobsel,
autoplace, numpages); autoplace, numpages);
oob = 0;
/* Check, if we cross a chip boundary */ /* Check, if we cross a chip boundary */
if (!page) { if (!page) {
chipnr++; chipnr++;