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authorGuenter Roeck <linux@roeck-us.net>2018-07-01 13:57:24 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-12-17 09:38:35 +0100
commitdf62280ba8ac8d2d66e5d93ab76c8cbc9c1a319f (patch)
parent5c35dc008c6bf990f18226c4a1a455ec98d4cc43 (diff)
staging: speakup: Replace strncpy with memcpy
commit fd29edc7232bc19f969e8f463138afc5472b3d5f upstream. gcc 8.1.0 generates the following warnings. drivers/staging/speakup/kobjects.c: In function 'punc_store': drivers/staging/speakup/kobjects.c:522:2: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length drivers/staging/speakup/kobjects.c:504:6: note: length computed here drivers/staging/speakup/kobjects.c: In function 'synth_store': drivers/staging/speakup/kobjects.c:391:2: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length drivers/staging/speakup/kobjects.c:388:8: note: length computed here Using strncpy() is indeed less than perfect since the length of data to be copied has already been determined with strlen(). Replace strncpy() with memcpy() to address the warning and optimize the code a little. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/speakup/kobjects.c b/drivers/staging/speakup/kobjects.c
index dea018cba094..1253fe118044 100644
--- a/drivers/staging/speakup/kobjects.c
+++ b/drivers/staging/speakup/kobjects.c
@@ -387,7 +387,7 @@ static ssize_t synth_store(struct kobject *kobj, struct kobj_attribute *attr,
len = strlen(buf);
if (len < 2 || len > 9)
return -EINVAL;
- strncpy(new_synth_name, buf, len);
+ memcpy(new_synth_name, buf, len);
if (new_synth_name[len - 1] == '\n')
new_synth_name[len] = '\0';
@@ -517,7 +517,7 @@ static ssize_t punc_store(struct kobject *kobj, struct kobj_attribute *attr,
return -EINVAL;
- strncpy(punc_buf, buf, x);
+ memcpy(punc_buf, buf, x);
while (x && punc_buf[x - 1] == '\n')