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net: sunrpc: Fix 'snprintf' return value check in 'do_xprt_debugfs' 

'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>
Fixes: 2f34b8bfae ("SUNRPC: add links for all client xprts to debugfs")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Fedor Tokarev 2020-10-15 16:59:08 +03:00 committed by Trond Myklebust
parent d3ff46fe69
commit 35a6d39672
1 changed files with 2 additions and 2 deletions
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4
net/sunrpc/debugfs.c
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@ -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);