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Date: Wed, 16 Apr 2014 11:31:51 +0100 From: Luis Henriques <luis.henriques@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>, "David S. Miller" <davem@...emloft.net>, Luis Henriques <luis.henriques@...onical.com> Subject: [PATCH 3.11 35/46] isdnloop: Validate NUL-terminated strings from user. 3.11.10.8 -stable review patch. If anyone has any objections, please let me know. ------------------ From: =?UTF-8?q?YOSHIFUJI=20Hideaki=20/=20=E5=90=89=E8=97=A4=E8=8B=B1?= commit 77bc6bed7121936bb2e019a8c336075f4c8eef62 upstream. Return -EINVAL unless all of user-given strings are correctly NUL-terminated. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Luis Henriques <luis.henriques@...onical.com> --- drivers/isdn/isdnloop/isdnloop.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c index 02125e6..e1f8748 100644 --- a/drivers/isdn/isdnloop/isdnloop.c +++ b/drivers/isdn/isdnloop/isdnloop.c @@ -1070,6 +1070,12 @@ isdnloop_start(isdnloop_card *card, isdnloop_sdef *sdefp) return -EBUSY; if (copy_from_user((char *) &sdef, (char *) sdefp, sizeof(sdef))) return -EFAULT; + + for (i = 0; i < 3; i++) { + if (!memchr(sdef.num[i], 0, sizeof(sdef.num[i]))) + return -EINVAL; + } + spin_lock_irqsave(&card->isdnloop_lock, flags); switch (sdef.ptype) { case ISDN_PTYPE_EURO: -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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