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[S390] zcrypt: initialize ap_messages for cex3 exploitation

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AP messages need to be initialized, before they will be used. Values
will be zeroized. This will be needed later when introducing support
for the special commands.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Felix Beck 2009-12-07 12:51:54 +01:00 committed by Martin Schwidefsky
parent f4ac1d0255
commit 468ffddf19
5 changed files with 22 additions and 0 deletions
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11
drivers/s390/crypto/ap_bus.h
View File

@ -167,6 +167,17 @@ struct ap_message {
.dev_type=(dt), \
.match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
/**
* ap_init_message() - Initialize ap_message.
* Initialize a message before using. Otherwise this might result in
* unexpected behaviour.
*/
static inline void ap_init_message(struct ap_message *ap_msg)
{
ap_msg->psmid = 0;
ap_msg->length = 0;
}
/*
* Note: don't use ap_send/ap_recv after using ap_queue_message
* for the first time. Otherwise the ap message queue will get

2
drivers/s390/crypto/zcrypt_cex2a.c
View File

@ -298,6 +298,7 @@ static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -335,6 +336,7 @@ static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;

2
drivers/s390/crypto/zcrypt_pcica.c
View File

@ -281,6 +281,7 @@ static long zcrypt_pcica_modexpo(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -318,6 +319,7 @@ static long zcrypt_pcica_modexpo_crt(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;

2
drivers/s390/crypto/zcrypt_pcicc.c
View File

@ -483,6 +483,7 @@ static long zcrypt_pcicc_modexpo(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -521,6 +522,7 @@ static long zcrypt_pcicc_modexpo_crt(struct zcrypt_device *zdev,
struct completion work;
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;

5
drivers/s390/crypto/zcrypt_pcixcc.c
View File

@ -688,6 +688,7 @@ static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -727,6 +728,7 @@ static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -766,6 +768,7 @@ static long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -805,6 +808,7 @@ static long zcrypt_pcixcc_rng(struct zcrypt_device *zdev,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
@ -972,6 +976,7 @@ static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
} __attribute__((packed)) *reply;
int rc, i;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;