From 2a0cbf3bca372dcbc79048d475c817d4e462069e Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Fri, 23 Oct 2020 13:00:01 +0200 Subject: [PATCH] log: correct and check array size of log categories The log command has led to NULL dereferences if an unknown category name name was used due to missing entries in the list of category names. Add compile time checks for the array sizes of log_cat_name and log_lvl_name to avoid future mishaps. Signed-off-by: Heinrich Schuchardt Reviewed-by: Simon Glass --- common/log.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/common/log.c b/common/log.c index d830883825..9f98e9aff8 100644 --- a/common/log.c +++ b/common/log.c @@ -13,7 +13,7 @@ DECLARE_GLOBAL_DATA_PTR; -static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = { +static const char *log_cat_name[] = { "none", "arch", "board", @@ -28,7 +28,10 @@ static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = { "acpi", }; -static const char *log_level_name[LOGL_COUNT] = { +_Static_assert(ARRAY_SIZE(log_cat_name) == LOGC_COUNT - LOGC_NONE, + "log_cat_name size"); + +static const char *log_level_name[] = { "EMERG", "ALERT", "CRIT", @@ -41,6 +44,9 @@ static const char *log_level_name[LOGL_COUNT] = { "IO", }; +_Static_assert(ARRAY_SIZE(log_level_name) == LOGL_COUNT, "log_level_name size"); + +/* All error responses MUST begin with '<' */ const char *log_get_cat_name(enum log_category_t cat) { const char *name; -- 2.39.5