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Subject[PATCH 1/4] proc/bootconfig: Fix to use correct quotes for value
Date
Fix /proc/bootconfig to show the correctly choose the
double or single quotes according to the value.

If a bootconfig value includes a double quote character,
we must use single-quotes to quote that value.

Fixes: c1a3c36017d4 ("proc: bootconfig: Add /proc/bootconfig to show boot config list")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
fs/proc/bootconfig.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/proc/bootconfig.c b/fs/proc/bootconfig.c
index 9955d75c0585..930d1dae33eb 100644
--- a/fs/proc/bootconfig.c
+++ b/fs/proc/bootconfig.c
@@ -27,6 +27,7 @@ static int __init copy_xbc_key_value_list(char *dst, size_t size)
{
struct xbc_node *leaf, *vnode;
const char *val;
+ char q;
char *key, *end = dst + size;
int ret = 0;

@@ -41,16 +42,20 @@ static int __init copy_xbc_key_value_list(char *dst, size_t size)
break;
dst += ret;
vnode = xbc_node_get_child(leaf);
- if (vnode && xbc_node_is_array(vnode)) {
+ if (vnode) {
xbc_array_for_each_value(vnode, val) {
- ret = snprintf(dst, rest(dst, end), "\"%s\"%s",
- val, vnode->next ? ", " : "\n");
+ if (strchr(val, '"'))
+ q = '\'';
+ else
+ q = '"';
+ ret = snprintf(dst, rest(dst, end), "%c%s%c%s",
+ q, val, q, vnode->next ? ", " : "\n");
if (ret < 0)
goto out;
dst += ret;
}
} else {
- ret = snprintf(dst, rest(dst, end), "\"%s\"\n", val);
+ ret = snprintf(dst, rest(dst, end), "\"\"\n");
if (ret < 0)
break;
dst += ret;
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