Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Wed, 28 Feb 2018 15:20:18 +0000 | Subject | [PATCH 3.16 130/254] usbip: fix usbip bind writing random string after command in match_busid |
| |
3.16.55-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Juan Zea <juan.zea@qindel.com>
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> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/staging/usbip/userspace/src/utils.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/staging/usbip/userspace/src/utils.c +++ b/drivers/staging/usbip/userspace/src/utils.c @@ -30,6 +30,7 @@ int modify_match_busid(char *busid, int 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 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;
| |