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ALSA: info: Limit the proc text input size
[firefly-linux-kernel-4.4.55.git]
/
sound
/
core
/
info.c
diff --git
a/sound/core/info.c
b/sound/core/info.c
index dbef9edd4871a7182ac70db79255f6a93ffb1afe..8ab72e0f593292ac91aea0b06b70d89fc084bd3c 100644
(file)
--- a/
sound/core/info.c
+++ b/
sound/core/info.c
@@
-331,6
+331,9
@@
static ssize_t snd_info_text_entry_write(struct file *file,
if (!valid_pos(pos, count))
return -EIO;
next = pos + count;
+ /* don't handle too large text inputs */
+ if (next > 16 * 1024)
+ return -EIO;
mutex_lock(&entry->access);
buf = data->wbuffer;
if (!buf) {