From d8bde3bf7f82dac5fc68a62c2816793a12cafa2a Mon Sep 17 00:00:00 2001 From: Xiaobo Liu Date: Fri, 14 Oct 2022 10:05:40 +0800 Subject: net/atm: fix proc_mpc_write incorrect return value Then the input contains '\0' or '\n', proc_mpc_write has read them, so the return value needs +1. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Xiaobo Liu Signed-off-by: David S. Miller --- net/atm/mpoa_proc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/atm') diff --git a/net/atm/mpoa_proc.c b/net/atm/mpoa_proc.c index 829db9eba0cb..aaf64b953915 100644 --- a/net/atm/mpoa_proc.c +++ b/net/atm/mpoa_proc.c @@ -219,11 +219,12 @@ static ssize_t proc_mpc_write(struct file *file, const char __user *buff, if (!page) return -ENOMEM; - for (p = page, len = 0; len < nbytes; p++, len++) { + for (p = page, len = 0; len < nbytes; p++) { if (get_user(*p, buff++)) { free_page((unsigned long)page); return -EFAULT; } + len += 1; if (*p == '\0' || *p == '\n') break; } -- cgit v1.2.3