From ee7ff5fed25711a26da7826071e6ede8af049ad2 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Sat, 11 Oct 2014 13:46:29 +0200 Subject: [PATCH] isdn/gigaset: make sure controller name is null terminated In gigaset_isdn_regdev, the name field may not have a null terminator if the source string's length is equal to the buffer size. Fix by zero filling the structure and excluding the last byte of the name field from the copy. Spotted with Coverity. Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/capi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c index a2eabe97deea..044392cba262 100644 --- a/drivers/isdn/gigaset/capi.c +++ b/drivers/isdn/gigaset/capi.c @@ -2358,7 +2358,7 @@ int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) struct gigaset_capi_ctr *iif; int rc; - iif = kmalloc(sizeof(*iif), GFP_KERNEL); + iif = kzalloc(sizeof(*iif), GFP_KERNEL); if (!iif) { pr_err("%s: out of memory\n", __func__); return -ENOMEM; @@ -2367,7 +2367,7 @@ int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) /* prepare controller structure */ iif->ctr.owner = THIS_MODULE; iif->ctr.driverdata = cs; - strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name)); + strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name) - 1); iif->ctr.driver_name = "gigaset"; iif->ctr.load_firmware = NULL; iif->ctr.reset_ctr = NULL; -- 2.20.1