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authorJulia Lawall <julia@diku.dk>2008-12-25 13:39:28 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:39:16 +0100
commit21e7b2c4d59e5d6631b25e71e777cb0160997d6a (patch)
treeb7ec97726e6d16756da6104f5284ea98453c8f80
parent33b1d09ef317d64c58b135c2e811bb55b3f15b19 (diff)
[S390] drivers/s390/crypto: Move dereference to after IS_ERR test
If reply is ERR_PTR(...), then it should not be dereferenced, so I have moved the dereference from the declaration to after the IS_ERR test. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @match exists@ expression x, E; identifier fld; position p1,p2; @@ ( x = E; | x = E | x@p1->fld ... when != x = E IS_ERR(x@p2) ... when any ) @other_match exists@ expression match.x, E1, E2; position match.p1,match.p2; @@ x = E1 ... when != x = E2 when != x@p1 x@p2 @ script:python depends on !other_match@ p1 << match.p1; p2 << match.p2; @@ print "* file %s dereference %s test %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/crypto/zcrypt_cex2a.c10
-rw-r--r--drivers/s390/crypto/zcrypt_pcica.c10
-rw-r--r--drivers/s390/crypto/zcrypt_pcicc.c10
-rw-r--r--drivers/s390/crypto/zcrypt_pcixcc.c10
4 files changed, 28 insertions, 12 deletions
diff --git a/drivers/s390/crypto/zcrypt_cex2a.c b/drivers/s390/crypto/zcrypt_cex2a.c
index 54f4cbc..326ea08 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.c
+++ b/drivers/s390/crypto/zcrypt_cex2a.c
@@ -264,17 +264,21 @@ static void zcrypt_cex2a_receive(struct ap_device *ap_dev,
.type = TYPE82_RSP_CODE,
.reply_code = REP82_ERROR_MACHINE_FAILURE,
};
- struct type80_hdr *t80h = reply->message;
+ struct type80_hdr *t80h;
int length;
/* Copy the reply message to the request message buffer. */
- if (IS_ERR(reply))
+ if (IS_ERR(reply)) {
memcpy(msg->message, &error_reply, sizeof(error_reply));
- else if (t80h->type == TYPE80_RSP_CODE) {
+ goto out;
+ }
+ t80h = reply->message;
+ if (t80h->type == TYPE80_RSP_CODE) {
length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
memcpy(msg->message, reply->message, length);
} else
memcpy(msg->message, reply->message, sizeof error_reply);
+out:
complete((struct completion *) msg->private);
}
diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c
index 12da481..17ba81b 100644
--- a/drivers/s390/crypto/zcrypt_pcica.c
+++ b/drivers/s390/crypto/zcrypt_pcica.c
@@ -247,17 +247,21 @@ static void zcrypt_pcica_receive(struct ap_device *ap_dev,
.type = TYPE82_RSP_CODE,
.reply_code = REP82_ERROR_MACHINE_FAILURE,
};
- struct type84_hdr *t84h = reply->message;
+ struct type84_hdr *t84h;
int length;
/* Copy the reply message to the request message buffer. */
- if (IS_ERR(reply))
+ if (IS_ERR(reply)) {
memcpy(msg->message, &error_reply, sizeof(error_reply));
- else if (t84h->code == TYPE84_RSP_CODE) {
+ goto out;
+ }
+ t84h = reply->message;
+ if (t84h->code == TYPE84_RSP_CODE) {
length = min(PCICA_MAX_RESPONSE_SIZE, (int) t84h->len);
memcpy(msg->message, reply->message, length);
} else
memcpy(msg->message, reply->message, sizeof error_reply);
+out:
complete((struct completion *) msg->private);
}
diff --git a/drivers/s390/crypto/zcrypt_pcicc.c b/drivers/s390/crypto/zcrypt_pcicc.c
index 779952c..f4b0c47 100644
--- a/drivers/s390/crypto/zcrypt_pcicc.c
+++ b/drivers/s390/crypto/zcrypt_pcicc.c
@@ -447,19 +447,23 @@ static void zcrypt_pcicc_receive(struct ap_device *ap_dev,
.type = TYPE82_RSP_CODE,
.reply_code = REP82_ERROR_MACHINE_FAILURE,
};
- struct type86_reply *t86r = reply->message;
+ struct type86_reply *t86r;
int length;
/* Copy the reply message to the request message buffer. */
- if (IS_ERR(reply))
+ if (IS_ERR(reply)) {
memcpy(msg->message, &error_reply, sizeof(error_reply));
- else if (t86r->hdr.type == TYPE86_RSP_CODE &&
+ goto out;
+ }
+ t86r = reply->message;
+ if (t86r->hdr.type == TYPE86_RSP_CODE &&
t86r->cprb.cprb_ver_id == 0x01) {
length = sizeof(struct type86_reply) + t86r->length - 2;
length = min(PCICC_MAX_RESPONSE_SIZE, length);
memcpy(msg->message, reply->message, length);
} else
memcpy(msg->message, reply->message, sizeof error_reply);
+out:
complete((struct completion *) msg->private);
}
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index d8ad36f..e7a1e22 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -635,13 +635,16 @@ static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
};
struct response_type *resp_type =
(struct response_type *) msg->private;
- struct type86x_reply *t86r = reply->message;
+ struct type86x_reply *t86r;
int length;
/* Copy the reply message to the request message buffer. */
- if (IS_ERR(reply))
+ if (IS_ERR(reply)) {
memcpy(msg->message, &error_reply, sizeof(error_reply));
- else if (t86r->hdr.type == TYPE86_RSP_CODE &&
+ goto out;
+ }
+ t86r = reply->message;
+ if (t86r->hdr.type == TYPE86_RSP_CODE &&
t86r->cprbx.cprb_ver_id == 0x02) {
switch (resp_type->type) {
case PCIXCC_RESPONSE_TYPE_ICA:
@@ -660,6 +663,7 @@ static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
}
} else
memcpy(msg->message, reply->message, sizeof error_reply);
+out:
complete(&(resp_type->work));
}