From: Dan Carpenter Date: Mon, 3 Dec 2012 19:05:12 +0000 (+0300) Subject: telephony: ijx: buffer overflow in ixj_write_cid() X-Git-Tag: v3.0.57~17 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d2e08635c22a9222f606062b42a7ad656f6a8584;p=karo-tx-linux.git telephony: ijx: buffer overflow in ixj_write_cid() [Not needed in 3.8 or newer as this driver is removed there. - gregkh] We get this from user space and nothing has been done to ensure that these strings are NUL terminated. Reported-by: Chen Gang Signed-off-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/telephony/ixj.c b/drivers/telephony/ixj.c index d5f923bcdffe..e1abb45c3cfe 100644 --- a/drivers/telephony/ixj.c +++ b/drivers/telephony/ixj.c @@ -3190,12 +3190,12 @@ static void ixj_write_cid(IXJ *j) ixj_fsk_alloc(j); - strcpy(sdmf1, j->cid_send.month); - strcat(sdmf1, j->cid_send.day); - strcat(sdmf1, j->cid_send.hour); - strcat(sdmf1, j->cid_send.min); - strcpy(sdmf2, j->cid_send.number); - strcpy(sdmf3, j->cid_send.name); + strlcpy(sdmf1, j->cid_send.month, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.day, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.hour, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.min, sizeof(sdmf1)); + strlcpy(sdmf2, j->cid_send.number, sizeof(sdmf2)); + strlcpy(sdmf3, j->cid_send.name, sizeof(sdmf3)); len1 = strlen(sdmf1); len2 = strlen(sdmf2); @@ -3340,12 +3340,12 @@ static void ixj_write_cidcw(IXJ *j) ixj_pre_cid(j); } j->flags.cidcw_ack = 0; - strcpy(sdmf1, j->cid_send.month); - strcat(sdmf1, j->cid_send.day); - strcat(sdmf1, j->cid_send.hour); - strcat(sdmf1, j->cid_send.min); - strcpy(sdmf2, j->cid_send.number); - strcpy(sdmf3, j->cid_send.name); + strlcpy(sdmf1, j->cid_send.month, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.day, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.hour, sizeof(sdmf1)); + strlcat(sdmf1, j->cid_send.min, sizeof(sdmf1)); + strlcpy(sdmf2, j->cid_send.number, sizeof(sdmf2)); + strlcpy(sdmf3, j->cid_send.name, sizeof(sdmf3)); len1 = strlen(sdmf1); len2 = strlen(sdmf2);