* [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2009-12-29 19:16 ` Julia Lawall
0 siblings, 0 replies; 7+ messages in thread
From: Julia Lawall @ 2009-12-29 19:16 UTC (permalink / raw)
To: Patrick McHardy, David S. Miller, Alexey Kuznetsov,
Pekka Savola (ipv6), James Morris, Hideaki YOSHIFUJI,
netfilter-devel, netfilter, coreteam, netdev, linux-kernel,
kernel-janitors
From: Julia Lawall <julia@diku.dk>
obj has type struct snmp_object **, not struct snmp_object *. But indeed
it is not even clear why kmalloc is needed. The memory is freed by the end
of the function, so the local variable of pointer type should be sufficient.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@disable sizeof_type_expr@
type T;
T **x;
@@
x <+...sizeof(
- T
+ *x
)...+>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
net/ipv4/netfilter/nf_nat_snmp_basic.c | 31 +++++++-------------
1 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d9521f6..0b9c7ce 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1038,7 +1038,7 @@ static int snmp_parse_mangle(unsigned char *msg,
unsigned int cls, con, tag, vers, pdutype;
struct asn1_ctx ctx;
struct asn1_octstr comm;
- struct snmp_object **obj;
+ struct snmp_object *obj;
if (debug > 1)
hex_dump(msg, len);
@@ -1148,43 +1148,34 @@ static int snmp_parse_mangle(unsigned char *msg,
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return 0;
- obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
- if (obj = NULL) {
- if (net_ratelimit())
- printk(KERN_WARNING "OOM in bsalg(%d)\n", __LINE__);
- return 0;
- }
-
while (!asn1_eoc_decode(&ctx, eoc)) {
unsigned int i;
- if (!snmp_object_decode(&ctx, obj)) {
- if (*obj) {
- kfree((*obj)->id);
- kfree(*obj);
+ if (!snmp_object_decode(&ctx, &obj)) {
+ if (obj) {
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
return 0;
}
if (debug > 1) {
printk(KERN_DEBUG "bsalg: object: ");
- for (i = 0; i < (*obj)->id_len; i++) {
+ for (i = 0; i < obj->id_len; i++) {
if (i > 0)
printk(".");
- printk("%lu", (*obj)->id[i]);
+ printk("%lu", obj->id[i]);
}
- printk(": type=%u\n", (*obj)->type);
+ printk(": type=%u\n", obj->type);
}
- if ((*obj)->type = SNMP_IPADDR)
+ if (obj->type = SNMP_IPADDR)
mangle_address(ctx.begin, ctx.pointer - 4 , map, check);
- kfree((*obj)->id);
- kfree(*obj);
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
if (!asn1_eoc_decode(&ctx, eoc))
return 0;
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2009-12-29 19:16 ` Julia Lawall
0 siblings, 0 replies; 7+ messages in thread
From: Julia Lawall @ 2009-12-29 19:16 UTC (permalink / raw)
To: Patrick McHardy, David S. Miller, Alexey Kuznetsov,
Pekka Savola (ipv6), James Morris, Hideaki YOSHIFUJI,
netfilter-devel, netfilter, coreteam, netdev, linux-kernel,
kernel-janitors
From: Julia Lawall <julia@diku.dk>
obj has type struct snmp_object **, not struct snmp_object *. But indeed
it is not even clear why kmalloc is needed. The memory is freed by the end
of the function, so the local variable of pointer type should be sufficient.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@disable sizeof_type_expr@
type T;
T **x;
@@
x =
<+...sizeof(
- T
+ *x
)...+>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
net/ipv4/netfilter/nf_nat_snmp_basic.c | 31 +++++++-------------
1 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d9521f6..0b9c7ce 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1038,7 +1038,7 @@ static int snmp_parse_mangle(unsigned char *msg,
unsigned int cls, con, tag, vers, pdutype;
struct asn1_ctx ctx;
struct asn1_octstr comm;
- struct snmp_object **obj;
+ struct snmp_object *obj;
if (debug > 1)
hex_dump(msg, len);
@@ -1148,43 +1148,34 @@ static int snmp_parse_mangle(unsigned char *msg,
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return 0;
- obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
- if (obj == NULL) {
- if (net_ratelimit())
- printk(KERN_WARNING "OOM in bsalg(%d)\n", __LINE__);
- return 0;
- }
-
while (!asn1_eoc_decode(&ctx, eoc)) {
unsigned int i;
- if (!snmp_object_decode(&ctx, obj)) {
- if (*obj) {
- kfree((*obj)->id);
- kfree(*obj);
+ if (!snmp_object_decode(&ctx, &obj)) {
+ if (obj) {
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
return 0;
}
if (debug > 1) {
printk(KERN_DEBUG "bsalg: object: ");
- for (i = 0; i < (*obj)->id_len; i++) {
+ for (i = 0; i < obj->id_len; i++) {
if (i > 0)
printk(".");
- printk("%lu", (*obj)->id[i]);
+ printk("%lu", obj->id[i]);
}
- printk(": type=%u\n", (*obj)->type);
+ printk(": type=%u\n", obj->type);
}
- if ((*obj)->type == SNMP_IPADDR)
+ if (obj->type == SNMP_IPADDR)
mangle_address(ctx.begin, ctx.pointer - 4 , map, check);
- kfree((*obj)->id);
- kfree(*obj);
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
if (!asn1_eoc_decode(&ctx, eoc))
return 0;
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2009-12-29 19:16 ` Julia Lawall
0 siblings, 0 replies; 7+ messages in thread
From: Julia Lawall @ 2009-12-29 19:16 UTC (permalink / raw)
To: Patrick McHardy, David S. Miller, Alexey Kuznetsov,
Pekka Savola (ipv6), James Morris <jmorris@
From: Julia Lawall <julia@diku.dk>
obj has type struct snmp_object **, not struct snmp_object *. But indeed
it is not even clear why kmalloc is needed. The memory is freed by the end
of the function, so the local variable of pointer type should be sufficient.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@disable sizeof_type_expr@
type T;
T **x;
@@
x =
<+...sizeof(
- T
+ *x
)...+>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
net/ipv4/netfilter/nf_nat_snmp_basic.c | 31 +++++++-------------
1 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d9521f6..0b9c7ce 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1038,7 +1038,7 @@ static int snmp_parse_mangle(unsigned char *msg,
unsigned int cls, con, tag, vers, pdutype;
struct asn1_ctx ctx;
struct asn1_octstr comm;
- struct snmp_object **obj;
+ struct snmp_object *obj;
if (debug > 1)
hex_dump(msg, len);
@@ -1148,43 +1148,34 @@ static int snmp_parse_mangle(unsigned char *msg,
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return 0;
- obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
- if (obj == NULL) {
- if (net_ratelimit())
- printk(KERN_WARNING "OOM in bsalg(%d)\n", __LINE__);
- return 0;
- }
-
while (!asn1_eoc_decode(&ctx, eoc)) {
unsigned int i;
- if (!snmp_object_decode(&ctx, obj)) {
- if (*obj) {
- kfree((*obj)->id);
- kfree(*obj);
+ if (!snmp_object_decode(&ctx, &obj)) {
+ if (obj) {
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
return 0;
}
if (debug > 1) {
printk(KERN_DEBUG "bsalg: object: ");
- for (i = 0; i < (*obj)->id_len; i++) {
+ for (i = 0; i < obj->id_len; i++) {
if (i > 0)
printk(".");
- printk("%lu", (*obj)->id[i]);
+ printk("%lu", obj->id[i]);
}
- printk(": type=%u\n", (*obj)->type);
+ printk(": type=%u\n", obj->type);
}
- if ((*obj)->type == SNMP_IPADDR)
+ if (obj->type == SNMP_IPADDR)
mangle_address(ctx.begin, ctx.pointer - 4 , map, check);
- kfree((*obj)->id);
- kfree(*obj);
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
if (!asn1_eoc_decode(&ctx, eoc))
return 0;
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
2009-12-29 19:16 ` Julia Lawall
@ 2010-01-04 14:23 ` Patrick McHardy
-1 siblings, 0 replies; 7+ messages in thread
From: Patrick McHardy @ 2010-01-04 14:23 UTC (permalink / raw)
To: Julia Lawall
Cc: David S. Miller, Alexey Kuznetsov, Pekka Savola (ipv6),
James Morris, Hideaki YOSHIFUJI, netfilter-devel, netfilter,
coreteam, netdev, linux-kernel, kernel-janitors
Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
>
> obj has type struct snmp_object **, not struct snmp_object *. But indeed
> it is not even clear why kmalloc is needed. The memory is freed by the end
> of the function, so the local variable of pointer type should be sufficient.
Thanks. As this is basically just an unneeded and oversized allocation
without any bad consequences, I've applied it to nf-next-2.6.git.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2010-01-04 14:23 ` Patrick McHardy
0 siblings, 0 replies; 7+ messages in thread
From: Patrick McHardy @ 2010-01-04 14:23 UTC (permalink / raw)
To: Julia Lawall
Cc: David S. Miller, Alexey Kuznetsov, Pekka Savola (ipv6),
James Morris, Hideaki YOSHIFUJI, netfilter-devel, netfilter,
coreteam, netdev, linux-kernel, kernel-janitors
Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
>
> obj has type struct snmp_object **, not struct snmp_object *. But indeed
> it is not even clear why kmalloc is needed. The memory is freed by the end
> of the function, so the local variable of pointer type should be sufficient.
Thanks. As this is basically just an unneeded and oversized allocation
without any bad consequences, I've applied it to nf-next-2.6.git.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2009-12-29 19:16 Julia Lawall
0 siblings, 0 replies; 7+ messages in thread
From: Julia Lawall @ 2009-12-29 19:16 UTC (permalink / raw)
To: Patrick McHardy, David S. Miller, Alexey Kuznetsov,
Pekka Savola (ipv6), James Morris <>
From: Julia Lawall <julia@diku.dk>
obj has type struct snmp_object **, not struct snmp_object *. But indeed
it is not even clear why kmalloc is needed. The memory is freed by the end
of the function, so the local variable of pointer type should be sufficient.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@disable sizeof_type_expr@
type T;
T **x;
@@
x =
<+...sizeof(
- T
+ *x
)...+>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
net/ipv4/netfilter/nf_nat_snmp_basic.c | 31 +++++++-------------
1 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d9521f6..0b9c7ce 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1038,7 +1038,7 @@ static int snmp_parse_mangle(unsigned char *msg,
unsigned int cls, con, tag, vers, pdutype;
struct asn1_ctx ctx;
struct asn1_octstr comm;
- struct snmp_object **obj;
+ struct snmp_object *obj;
if (debug > 1)
hex_dump(msg, len);
@@ -1148,43 +1148,34 @@ static int snmp_parse_mangle(unsigned char *msg,
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return 0;
- obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
- if (obj == NULL) {
- if (net_ratelimit())
- printk(KERN_WARNING "OOM in bsalg(%d)\n", __LINE__);
- return 0;
- }
-
while (!asn1_eoc_decode(&ctx, eoc)) {
unsigned int i;
- if (!snmp_object_decode(&ctx, obj)) {
- if (*obj) {
- kfree((*obj)->id);
- kfree(*obj);
+ if (!snmp_object_decode(&ctx, &obj)) {
+ if (obj) {
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
return 0;
}
if (debug > 1) {
printk(KERN_DEBUG "bsalg: object: ");
- for (i = 0; i < (*obj)->id_len; i++) {
+ for (i = 0; i < obj->id_len; i++) {
if (i > 0)
printk(".");
- printk("%lu", (*obj)->id[i]);
+ printk("%lu", obj->id[i]);
}
- printk(": type=%u\n", (*obj)->type);
+ printk(": type=%u\n", obj->type);
}
- if ((*obj)->type == SNMP_IPADDR)
+ if (obj->type == SNMP_IPADDR)
mangle_address(ctx.begin, ctx.pointer - 4 , map, check);
- kfree((*obj)->id);
- kfree(*obj);
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
if (!asn1_eoc_decode(&ctx, eoc))
return 0;
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc
@ 2009-12-29 19:16 Julia Lawall
0 siblings, 0 replies; 7+ messages in thread
From: Julia Lawall @ 2009-12-29 19:16 UTC (permalink / raw)
To: Patrick McHardy, David S. Miller, Alexey Kuznetsov,
Pekka Savola (ipv6), James Morris <jmorris@
From: Julia Lawall <julia@diku.dk>
obj has type struct snmp_object **, not struct snmp_object *. But indeed
it is not even clear why kmalloc is needed. The memory is freed by the end
of the function, so the local variable of pointer type should be sufficient.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@disable sizeof_type_expr@
type T;
T **x;
@@
x =
<+...sizeof(
- T
+ *x
)...+>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
net/ipv4/netfilter/nf_nat_snmp_basic.c | 31 +++++++-------------
1 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d9521f6..0b9c7ce 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1038,7 +1038,7 @@ static int snmp_parse_mangle(unsigned char *msg,
unsigned int cls, con, tag, vers, pdutype;
struct asn1_ctx ctx;
struct asn1_octstr comm;
- struct snmp_object **obj;
+ struct snmp_object *obj;
if (debug > 1)
hex_dump(msg, len);
@@ -1148,43 +1148,34 @@ static int snmp_parse_mangle(unsigned char *msg,
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return 0;
- obj = kmalloc(sizeof(struct snmp_object), GFP_ATOMIC);
- if (obj == NULL) {
- if (net_ratelimit())
- printk(KERN_WARNING "OOM in bsalg(%d)\n", __LINE__);
- return 0;
- }
-
while (!asn1_eoc_decode(&ctx, eoc)) {
unsigned int i;
- if (!snmp_object_decode(&ctx, obj)) {
- if (*obj) {
- kfree((*obj)->id);
- kfree(*obj);
+ if (!snmp_object_decode(&ctx, &obj)) {
+ if (obj) {
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
return 0;
}
if (debug > 1) {
printk(KERN_DEBUG "bsalg: object: ");
- for (i = 0; i < (*obj)->id_len; i++) {
+ for (i = 0; i < obj->id_len; i++) {
if (i > 0)
printk(".");
- printk("%lu", (*obj)->id[i]);
+ printk("%lu", obj->id[i]);
}
- printk(": type=%u\n", (*obj)->type);
+ printk(": type=%u\n", obj->type);
}
- if ((*obj)->type == SNMP_IPADDR)
+ if (obj->type == SNMP_IPADDR)
mangle_address(ctx.begin, ctx.pointer - 4 , map, check);
- kfree((*obj)->id);
- kfree(*obj);
+ kfree(obj->id);
+ kfree(obj);
}
- kfree(obj);
if (!asn1_eoc_decode(&ctx, eoc))
return 0;
^ permalink raw reply related [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-01-04 14:23 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-12-29 19:16 [PATCH 5/5] net/ipv4 : Correct the size argument to kzalloc Julia Lawall
2009-12-29 19:16 ` Julia Lawall
2009-12-29 19:16 ` Julia Lawall
2010-01-04 14:23 ` Patrick McHardy
2010-01-04 14:23 ` Patrick McHardy
-- strict thread matches above, loose matches on Subject: below --
2009-12-29 19:16 Julia Lawall
2009-12-29 19:16 Julia Lawall
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.