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authorTakashi Iwai <tiwai@suse.de>2020-03-11 12:28:07 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2020-03-12 11:27:41 +0300
commit3010518964dc96c41848a05a5b0ec11ccf8d5ebe (patch)
tree35cc9c853d4f22b35143af55f494fd61c3086002 /drivers/thunderbolt/domain.c
parent3084ea9ea88906576d0bfc0d66cb1735045266c8 (diff)
downloadlinux-3010518964dc96c41848a05a5b0ec11ccf8d5ebe.tar.xz
thunderbolt: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/domain.c')
-rw-r--r--drivers/thunderbolt/domain.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index b7980c856898..68c1b93ac5d9 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -147,10 +147,10 @@ static ssize_t boot_acl_show(struct device *dev, struct device_attribute *attr,
for (ret = 0, i = 0; i < tb->nboot_acl; i++) {
if (!uuid_is_null(&uuids[i]))
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "%pUb",
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%pUb",
&uuids[i]);
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "%s",
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s",
i < tb->nboot_acl - 1 ? "," : "\n");
}