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imx: nandbcb: Fix resource leak in read_fcb

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Fix Coverity Issue 9006657. In read_fcb, leak of memory to system
resource "fcb_raw_page". Adjust the sequence to check the mtd bad
block prior than allocation of "fcb_raw_page", also check the NULL
return of allocation.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2020-08-02 22:43:45 -07:00 committed by Stefano Babic
parent fc11dc112d
commit f637c40dd7
1 changed files with 7 additions and 2 deletions
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9
arch/arm/mach-imx/cmd_nandbcb.c
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@ -503,13 +503,18 @@ static int read_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb,
int ret = 0;
mtd = boot_cfg->mtd;
fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
if (mtd_block_isbad(mtd, off)) {
printf("Block %d is bad, skipped\n", (int)CONV_TO_BLOCKS(off));
return 1;
}
fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
if (!fcb_raw_page) {
debug("failed to allocate fcb_raw_page\n");
ret = -ENOMEM;
return ret;
}
/*
* User BCH hardware to decode ECC for FCB
*/