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s390/crypto: fix gcc 8 stringop-truncation warning 

Replace strncpy which is used to deliberately avoid string NUL-termination
with memcpy. This allows to get rid of gcc 8 stringop-truncation warning:

    inlined from 'query_crypto_facility.constprop' at
    drivers/s390/crypto/pkey_api.c:702:2:
./include/linux/string.h:246:9: warning: '__builtin_strncpy' output
truncated before terminating nul copying 8 bytes from a string of the
same length [-Wstringop-truncation]

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik 2018-06-28 13:33:35 +02:00 committed by Martin Schwidefsky
parent 9dcc7570b0
commit a09baa9543
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/crypto/pkey_api.c
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@ -699,7 +699,7 @@ static int query_crypto_facility(u16 cardnr, u16 domain,
/* fill request cprb param block with FQ request */
preqparm = (struct fqreqparm *) preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "FQ", 2);
strncpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
memcpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
preqparm->lv1.len = sizeof(preqparm->lv1);