| Message ID | 20201015135341.GA16343@laptop (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: sunrpc: Fix 'snprintf' return value check in 'do_xprt_debugfs' | expand |
diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c index fd9bca2..56029e3 100644 --- a/net/sunrpc/debugfs.c +++ b/net/sunrpc/debugfs.c @@ -128,13 +128,13 @@ static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *n return 0; len = snprintf(name, sizeof(name), "../../rpc_xprt/%s", xprt->debugfs->d_name.name); - if (len > sizeof(name)) + if (len >= sizeof(name)) return -1; if (*nump == 0) strcpy(link, "xprt"); else { len = snprintf(link, sizeof(link), "xprt%d", *nump); - if (len > sizeof(link)) + if (len >= sizeof(link)) return -1; } debugfs_create_symlink(link, clnt->cl_debugfs, name);
'snprintf' returns the number of characters which would have been written if enough space had been available, excluding the terminating null byte. Thus, the return value of 'sizeof(buf)' means that the last character has been dropped. Signed-off-by: Fedor Tokarev <ftokarev@gmail.com> --- net/sunrpc/debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)