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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 <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2020-02-05 22:50:04 +09:00 committed by Steven Rostedt (VMware)
parent e241d14a82
commit 597c0e3b45
1 changed files with 12 additions and 4 deletions
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16
lib/bootconfig.c
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@ -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;