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In uuid_ether_add(), avoid false positives due to the limited type

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used to hold the sum of the bytes of the MAC address. While here,
rename the variable that holds the sum from 'c' to 'sum'.

Pointed out by: thompsa@
This commit is contained in:
Marcel Moolenaar 2013-07-24 16:22:27 +00:00
parent b9740ba1a8
commit 8ff6ca1e08
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=253615
1 changed files with 4 additions and 5 deletions
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9
sys/kern/kern_uuid.c
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@ -200,8 +200,7 @@ sys_uuidgen(struct thread *td, struct uuidgen_args *uap)
int int
uuid_ether_add(const uint8_t *addr) uuid_ether_add(const uint8_t *addr)
{ {
int i; int i, sum;
uint8_t c;
/* /*
* Validate input. No multicast addresses and no addresses that * Validate input. No multicast addresses and no addresses that
@ -209,10 +208,10 @@ uuid_ether_add(const uint8_t *addr)
*/ */
if (addr[0] & 0x01) if (addr[0] & 0x01)
return (EINVAL); return (EINVAL);
c = 0; sum = 0;
for (i = 0; i < UUID_NODE_LEN; i++) for (i = 0; i < UUID_NODE_LEN; i++)
c += addr[i]; sum += addr[i];
if (c == 0) if (sum == 0)
return (EINVAL); return (EINVAL);
mtx_lock(&uuid_mutex); mtx_lock(&uuid_mutex);