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authorJuan Zea <juan.zea@qindel.com>2017-12-15 10:21:20 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-01-02 20:35:15 +0100
commit3c579d0b4f0f07ab5c57dd3329ca07d70168879b (patch)
tree21f47a0ebb7251d396142886709f321cdca5f71e /tools
parent67b539cab43cf3e46896a747004c923abf33ae17 (diff)
usbip: fix usbip bind writing random string after command in match_busid
commit 544c4605acc5ae4afe7dd5914147947db182f2fb upstream. usbip bind writes commands followed by random string when writing to match_busid attribute in sysfs, caused by using full variable size instead of string length. Signed-off-by: Juan Zea <juan.zea@qindel.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/usb/usbip/src/utils.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/tools/usb/usbip/src/utils.c b/tools/usb/usbip/src/utils.c
index 2b3d6d235015..3d7b42e77299 100644
--- a/tools/usb/usbip/src/utils.c
+++ b/tools/usb/usbip/src/utils.c
@@ -30,6 +30,7 @@ int modify_match_busid(char *busid, int add)
char command[SYSFS_BUS_ID_SIZE + 4];
char match_busid_attr_path[SYSFS_PATH_MAX];
int rc;
+ int cmd_size;
snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
"%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
@@ -37,12 +38,14 @@ int modify_match_busid(char *busid, int add)
attr_name);
if (add)
- snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s", busid);
+ cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s",
+ busid);
else
- snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s", busid);
+ cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s",
+ busid);
rc = write_sysfs_attribute(match_busid_attr_path, command,
- sizeof(command));
+ cmd_size);
if (rc < 0) {
dbg("failed to write match_busid: %s", strerror(errno));
return -1;