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authorXiaobo Liu <cppcoffee@gmail.com>2022-10-14 05:05:40 +0300
committerDavid S. Miller <davem@davemloft.net>2022-10-15 13:08:36 +0300
commitd8bde3bf7f82dac5fc68a62c2816793a12cafa2a (patch)
tree64fc30b1ea1e0a28890ba9a9a62d78df0e2e091d /net/atm
parenta8aed7b35becfd21f22a77c7014029ea837b018f (diff)
downloadlinux-d8bde3bf7f82dac5fc68a62c2816793a12cafa2a.tar.xz
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 <cppcoffee@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/atm')
-rw-r--r--net/atm/mpoa_proc.c3
1 files changed, 2 insertions, 1 deletions
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;
}