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| author | Colin Ian King <colin.king@canonical.com> | 2018-10-16 21:03:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-18 20:44:39 +0300 |
| commit | e325808c0051b16729ffd472ff887c6cae5c6317 (patch) | |
| tree | 92e61ed3a5bf24684bf64f3746b03c914577eeac | |
| parent | 090158555ff8d194a98616034100b16697dd80d0 (diff) | |
| download | linux-e325808c0051b16729ffd472ff887c6cae5c6317.tar.xz | |
usbip: tools: fix atoi() on non-null terminated string
Currently the call to atoi is being passed a single char string
that is not null terminated, so there is a potential read overrun
along the stack when parsing for an integer value. Fix this by
instead using a 2 char string that is initialized to all zeros
to ensure that a 1 char read into the string is always terminated
with a \0.
Detected by cppcheck:
"Invalid atoi() argument nr 1. A nul-terminated string is required."
Fixes: 3391ba0e2792 ("usbip: tools: Extract generic code to be shared with vudc backend")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | tools/usb/usbip/libsrc/usbip_host_common.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/usb/usbip/libsrc/usbip_host_common.c b/tools/usb/usbip/libsrc/usbip_host_common.c index dc93fadbee96..d79c7581b175 100644 --- a/tools/usb/usbip/libsrc/usbip_host_common.c +++ b/tools/usb/usbip/libsrc/usbip_host_common.c @@ -43,7 +43,7 @@ static int32_t read_attr_usbip_status(struct usbip_usb_device *udev) int size; int fd; int length; - char status; + char status[2] = { 0 }; int value = 0; size = snprintf(status_attr_path, sizeof(status_attr_path), @@ -61,14 +61,14 @@ static int32_t read_attr_usbip_status(struct usbip_usb_device *udev) return -1; } - length = read(fd, &status, 1); + length = read(fd, status, 1); if (length < 0) { err("error reading attribute %s", status_attr_path); close(fd); return -1; } - value = atoi(&status); + value = atoi(status); return value; } |