sdio: fix read buffer overflow
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>
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@ -40,7 +40,7 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
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nr_strings++;
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}
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if (buf[i-1] != '\0') {
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if (nr_strings < 4) {
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printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n");
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return 0;
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}
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