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| author |   Harald Freudenberger <freude@linux.ibm.com> | 2020-03-12 11:19:55 +0100 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2020-03-23 13:41:54 +0100 |
| commit | 40501c70e3f09e8018bf08457502a3a7b2d5a406 (patch) | |
| tree | cad7b3f657806f5c4fe6b95d129ee55ce56560f1 /drivers/s390/crypto/ap_card.c | |
| parent | s390/zcrypt: Use scnprintf() for avoiding potential buffer overflow (diff) | |
| download | linux-dev-40501c70e3f09e8018bf08457502a3a7b2d5a406.tar.xz linux-dev-40501c70e3f09e8018bf08457502a3a7b2d5a406.zip | |
s390/zcrypt: replace snprintf/sprintf with scnprintf
snprintf() may not always return the correct size of used bytes but
instead the length the resulting string would be if it would fit into
the buffer. So scnprintf() is the function to use when the real length
of the resulting string is needed.
Replace all occurrences of snprintf() with scnprintf() where the return
code is further processed. Also find and fix some occurrences where
sprintf() was used.
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/ap_card.c')
| -rw-r--r-- | drivers/s390/crypto/ap_card.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c index e85bfca1ed16..0a39dfdb6a1d 100644 --- a/drivers/s390/crypto/ap_card.c +++ b/drivers/s390/crypto/ap_card.c @@ -23,7 +23,7 @@ static ssize_t hwtype_show(struct device *dev, { struct ap_card *ac = to_ap_card(dev); - return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); + return scnprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); } static DEVICE_ATTR_RO(hwtype); @@ -33,7 +33,7 @@ static ssize_t raw_hwtype_show(struct device *dev, { struct ap_card *ac = to_ap_card(dev); - return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); + return scnprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); } static DEVICE_ATTR_RO(raw_hwtype); @@ -43,7 +43,7 @@ static ssize_t depth_show(struct device *dev, struct device_attribute *attr, { struct ap_card *ac = to_ap_card(dev); - return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); + return scnprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); } static DEVICE_ATTR_RO(depth); @@ -53,7 +53,7 @@ static ssize_t ap_functions_show(struct device *dev, { struct ap_card *ac = to_ap_card(dev); - return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); + return scnprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); } static DEVICE_ATTR_RO(ap_functions); @@ -69,7 +69,7 @@ static ssize_t request_count_show(struct device *dev, spin_lock_bh(&ap_list_lock); req_cnt = atomic64_read(&ac->total_request_count); spin_unlock_bh(&ap_list_lock); - return snprintf(buf, PAGE_SIZE, "%llu\n", req_cnt); + return scnprintf(buf, PAGE_SIZE, "%llu\n", req_cnt); } static ssize_t request_count_store(struct device *dev, @@ -102,7 +102,7 @@ static ssize_t requestq_count_show(struct device *dev, for_each_ap_queue(aq, ac) reqq_cnt += aq->requestq_count; spin_unlock_bh(&ap_list_lock); - return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); + return scnprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); } static DEVICE_ATTR_RO(requestq_count); @@ -119,7 +119,7 @@ static ssize_t pendingq_count_show(struct device *dev, for_each_ap_queue(aq, ac) penq_cnt += aq->pendingq_count; spin_unlock_bh(&ap_list_lock); - return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); + return scnprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); } static DEVICE_ATTR_RO(pendingq_count); @@ -127,7 +127,8 @@ static DEVICE_ATTR_RO(pendingq_count); static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); + return scnprintf(buf, PAGE_SIZE, "ap:t%02X\n", + to_ap_dev(dev)->device_type); } static DEVICE_ATTR_RO(modalias); |