From 597c0e3b4540972580ab36bcc8aa34394bd88cfb Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Wed, 5 Feb 2020 22:50:04 +0900 Subject: [PATCH] bootconfig: Add more parse error messages Add more error messages for following cases. - Exceeding max number of nodes - Config tree data is empty (e.g. comment only) - Config data is empty or exceeding max size - bootconfig is already initialized Link: http://lkml.kernel.org/r/158091060401.27924.9024818742827122764.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- lib/bootconfig.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 055014e233a5..a98ae136529c 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -373,7 +373,8 @@ static struct xbc_node * __init xbc_add_sibling(char *data, u32 flag) sib->next = xbc_node_index(node); } } - } + } else + xbc_parse_error("Too many nodes", data); return node; } @@ -657,8 +658,10 @@ static int __init xbc_verify_tree(void) struct xbc_node *n, *m; /* Empty tree */ - if (xbc_node_num == 0) + if (xbc_node_num == 0) { + xbc_parse_error("Empty config", xbc_data); return -ENOENT; + } for (i = 0; i < xbc_node_num; i++) { if (xbc_nodes[i].next > xbc_node_num) { @@ -732,12 +735,17 @@ int __init xbc_init(char *buf) char *p, *q; int ret, c; - if (xbc_data) + if (xbc_data) { + pr_err("Error: bootconfig is already initialized.\n"); return -EBUSY; + } ret = strlen(buf); - if (ret > XBC_DATA_MAX - 1 || ret == 0) + if (ret > XBC_DATA_MAX - 1 || ret == 0) { + pr_err("Error: Config data is %s.\n", + ret ? "too big" : "empty"); return -ERANGE; + } xbc_data = buf; xbc_data_size = ret + 1; -- 2.30.2