From 8d8f26e19cae48541b824f164021e1ff05067f8c Mon Sep 17 00:00:00 2001 From: "Maxin B. John" Date: Fri, 20 May 2011 15:44:10 +0100 Subject: [PATCH] mtd: mtdswap: fix possible null dereference This patch fixes the possible null dereference of the variable "oinfo" Thanks to Coverity for spotting this. Signed-off-by: Maxin B. John Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/mtdswap.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c index fed215c4cfa1..fd7885327611 100644 --- a/drivers/mtd/mtdswap.c +++ b/drivers/mtd/mtdswap.c @@ -1450,7 +1450,13 @@ static void mtdswap_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) } oinfo = mtd->ecclayout; - if (!mtd->oobsize || !oinfo || oinfo->oobavail < MTDSWAP_OOBSIZE) { + if (!oinfo) { + printk(KERN_ERR "%s: mtd%d does not have OOB\n", + MTDSWAP_PREFIX, mtd->index); + return; + } + + if (!mtd->oobsize || oinfo->oobavail < MTDSWAP_OOBSIZE) { printk(KERN_ERR "%s: Not enough free bytes in OOB, " "%d available, %zu needed.\n", MTDSWAP_PREFIX, oinfo->oobavail, MTDSWAP_OOBSIZE); -- 2.20.1