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sdio: fix read buffer overflow

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Avoid buffer underrun when parsing an invalid CISTPL_VERS_1.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roel Kluin 2009-09-22 16:45:09 -07:00 committed by Linus Torvalds
parent e9510176ff
commit 4245c0256d
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/sdio_cis.c
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@ -40,7 +40,7 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
nr_strings++; nr_strings++;
} }
if (buf[i-1] != '\0') { if (nr_strings < 4) {
printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n"); printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n");
return 0; return 0;
} }