From cb06b385d5361217764543a1dec746955a094d0b Mon Sep 17 00:00:00 2001 From: Alex Dewar Date: Mon, 24 Aug 2020 23:23:20 +0100 Subject: [PATCH] usb: atm: don't use snprintf() for sysfs attrs kernel/cpu.c: don't use snprintf() for sysfs attrs As per the documentation (Documentation/filesystems/sysfs.rst), snprintf() should not be used for formatting values returned by sysfs. In all of these cases, sprintf() suffices as we know that the formatted strings will be less than PAGE_SIZE in length. Issue identified by Coccinelle. Signed-off-by: Alex Dewar Link: https://lore.kernel.org/r/20200824222322.22962-1-alex.dewar90@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/atm/cxacru.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c index ea66f8f385ba..e62a770a5d3b 100644 --- a/drivers/usb/atm/cxacru.c +++ b/drivers/usb/atm/cxacru.c @@ -230,12 +230,12 @@ CXACRU__ATTR_INIT(_name) static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf) { - return snprintf(buf, PAGE_SIZE, "%u\n", value); + return sprintf(buf, "%u\n", value); } static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf) { - return snprintf(buf, PAGE_SIZE, "%d\n", value); + return sprintf(buf, "%d\n", value); } static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf) @@ -255,8 +255,8 @@ static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf) static char *str[] = { "no", "yes" }; if (unlikely(value >= ARRAY_SIZE(str))) - return snprintf(buf, PAGE_SIZE, "%u\n", value); - return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); + return sprintf(buf, "%u\n", value); + return sprintf(buf, "%s\n", str[value]); } static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf) @@ -264,8 +264,8 @@ static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf) static char *str[] = { NULL, "not connected", "connected", "lost" }; if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL)) - return snprintf(buf, PAGE_SIZE, "%u\n", value); - return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); + return sprintf(buf, "%u\n", value); + return sprintf(buf, "%s\n", str[value]); } static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf) @@ -275,8 +275,8 @@ static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf) "waiting", "initialising" }; if (unlikely(value >= ARRAY_SIZE(str))) - return snprintf(buf, PAGE_SIZE, "%u\n", value); - return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); + return sprintf(buf, "%u\n", value); + return sprintf(buf, "%s\n", str[value]); } static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf) @@ -288,8 +288,8 @@ static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf) "ITU-T G.992.2 (G.LITE)" }; if (unlikely(value >= ARRAY_SIZE(str))) - return snprintf(buf, PAGE_SIZE, "%u\n", value); - return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); + return sprintf(buf, "%u\n", value); + return sprintf(buf, "%s\n", str[value]); } /* @@ -309,8 +309,7 @@ static ssize_t mac_address_show(struct device *dev, if (instance == NULL || instance->usbatm->atm_dev == NULL) return -ENODEV; - return snprintf(buf, PAGE_SIZE, "%pM\n", - instance->usbatm->atm_dev->esi); + return sprintf(buf, "%pM\n", instance->usbatm->atm_dev->esi); } static ssize_t adsl_state_show(struct device *dev, @@ -326,8 +325,8 @@ static ssize_t adsl_state_show(struct device *dev, value = instance->card_info[CXINF_LINE_STARTABLE]; if (unlikely(value >= ARRAY_SIZE(str))) - return snprintf(buf, PAGE_SIZE, "%u\n", value); - return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); + return sprintf(buf, "%u\n", value); + return sprintf(buf, "%s\n", str[value]); } static ssize_t adsl_state_store(struct device *dev,