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net/9p: Use proper data types 

Use proper data types for storing the count of the binary blob and
length of a string. Without this patch length calculation of string will
always result in -1 because of comparision between signed and unsigned
integer.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
M. Mohan Kumar 2011-01-10 14:23:53 -06:00 committed by Eric Van Hensbergen
parent af7542fc8a
commit 219fd58be6
1 changed files with 10 additions and 12 deletions
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22
net/9p/protocol.c
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@ -178,27 +178,24 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt,
break;
case 's':{
char **sptr = va_arg(ap, char **);
int16_t len;
int size;
uint16_t len;
errcode = p9pdu_readf(pdu, proto_version,
"w", &len);
if (errcode)
break;
size = max_t(int16_t, len, 0);
*sptr = kmalloc(size + 1, GFP_KERNEL);
*sptr = kmalloc(len + 1, GFP_KERNEL);
if (*sptr == NULL) {
errcode = -EFAULT;
break;
}
if (pdu_read(pdu, *sptr, size)) {
if (pdu_read(pdu, *sptr, len)) {
errcode = -EFAULT;
kfree(*sptr);
*sptr = NULL;
} else
(*sptr)[size] = 0;
(*sptr)[len] = 0;
}
break;
case 'Q':{
@ -234,14 +231,14 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt,
}
break;
case 'D':{
int32_t *count = va_arg(ap, int32_t *);
uint32_t *count = va_arg(ap, uint32_t *);
void **data = va_arg(ap, void **);
errcode =
p9pdu_readf(pdu, proto_version, "d", count);
if (!errcode) {
*count =
min_t(int32_t, *count,
min_t(uint32_t, *count,
pdu->size - pdu->offset);
*data = &pdu->sdata[pdu->offset];
}
@ -404,9 +401,10 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
break;
case 's':{
const char *sptr = va_arg(ap, const char *);
int16_t len = 0;
uint16_t len = 0;
if (sptr)
len = min_t(int16_t, strlen(sptr), USHRT_MAX);
len = min_t(uint16_t, strlen(sptr),
USHRT_MAX);
errcode = p9pdu_writef(pdu, proto_version,
"w", len);
@ -438,7 +436,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
stbuf->n_gid, stbuf->n_muid);
} break;
case 'D':{
int32_t count = va_arg(ap, int32_t);
uint32_t count = va_arg(ap, uint32_t);
const void *data = va_arg(ap, const void *);
errcode = p9pdu_writef(pdu, proto_version, "d",