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Subject[PATCH 1/3] lightnvm: convert sprintf into snprintf
Date
Convert sprintf calls to snprintf in order to make possible buffer
overflow more obvious.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
drivers/lightnvm/core.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index c3340ef..bdbb333 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -272,7 +272,8 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
goto err_disk;
blk_queue_make_request(tqueue, tt->make_rq);

- sprintf(tdisk->disk_name, "%s", create->tgtname);
+ snprintf(tdisk->disk_name, sizeof(tdisk->disk_name), "%s",
+ create->tgtname);
tdisk->flags = GENHD_FL_EXT_DEVT;
tdisk->major = 0;
tdisk->first_minor = 0;
@@ -1195,13 +1196,13 @@ static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
list_for_each_entry(dev, &nvm_devices, devices) {
struct nvm_ioctl_device_info *info = &devices->info[i];

- sprintf(info->devname, "%s", dev->name);
+ snprintf(info->devname, sizeof(info->devname), "%s", dev->name);

/* kept for compatibility */
info->bmversion[0] = 1;
info->bmversion[1] = 0;
info->bmversion[2] = 0;
- sprintf(info->bmname, "%s", "gennvm");
+ snprintf(info->bmname, sizeof(info->bmname), "%s", "gennvm");
i++;

if (i > 31) {
--
2.7.4
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