From 25ad1cbd02fc9939089dafeb0a5698a7ca054237 Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Thu, 24 May 2018 09:53:39 +1000 Subject: cifs: return error on invalid value written to cifsFYI RHBZ: 1539617 Check that, if it is not a boolean, the value the user tries to write to /proc/fs/cifs/cifsFYI is valid and return an error if not. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Reported-by: Xiaoli Feng --- fs/cifs/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/cifs') diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index e6025e93c5eb..ef93d60ca416 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -584,6 +584,8 @@ static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, cifsFYI = bv; else if ((c[0] > '1') && (c[0] <= '9')) cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ + else + return -EINVAL; return count; } -- cgit v1.2.3-59-g8ed1b