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authorArnd Bergmann <arnd@arndb.de>2017-03-28 13:11:07 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-29 03:59:33 +0300
commitaf109a2cf6a9a6271fa420ae2d64d72d86c92b7d (patch)
tree541012599a12ad8d7eff411a1b567cbd316b07fd /drivers/isdn
parentf9ba3501d50317697811ff3c48f623f08d616fc8 (diff)
downloadlinux-af109a2cf6a9a6271fa420ae2d64d72d86c92b7d.tar.xz
isdn: kcapi: avoid uninitialized data
gcc-7 points out that the AVMB1_ADDCARD ioctl results in an unintialized value ending up in the cardnr parameter: drivers/isdn/capi/kcapi.c: In function 'old_capi_manufacturer': drivers/isdn/capi/kcapi.c:1042:24: error: 'cdef.cardnr' may be used uninitialized in this function [-Werror=maybe-uninitialized] cparams.cardnr = cdef.cardnr; This has been broken since before the start of the git history, so either the value is not used for anything important, or the ioctl command doesn't get called in practice. Setting the cardnr to zero avoids the warning and makes sure we have consistent behavior. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/capi/kcapi.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c
index 1dfd1085a04f..9ca691d6c13b 100644
--- a/drivers/isdn/capi/kcapi.c
+++ b/drivers/isdn/capi/kcapi.c
@@ -1032,6 +1032,7 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data)
sizeof(avmb1_carddef))))
return -EFAULT;
cdef.cardtype = AVM_CARDTYPE_B1;
+ cdef.cardnr = 0;
} else {
if ((retval = copy_from_user(&cdef, data,
sizeof(avmb1_extcarddef))))