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-rw-r--r--fs/proc/proc_sysctl.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 5b405f32971d..42c5128c7d1c 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -565,6 +565,10 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *ubuf,
if (!table->proc_handler)
goto out;
+ /* don't even try if the size is too large */
+ if (count > KMALLOC_MAX_SIZE)
+ return -ENOMEM;
+
if (write) {
kbuf = memdup_user_nul(ubuf, count);
if (IS_ERR(kbuf)) {