From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Mon, 16 Mar 2020 13:51:45 +0100 Subject: [PATCH] blscfg: return NULL instead of a zero-length array in bls_make_list() The bls_make_list() function returns a list of all the values for a given key and if there is none a NULL pointer should be returned. But currently is returnin a zero-length array instead. This makes the callers to wrongly assume that there are values for a key and populate wrong menu entries. For example menu entries are populated with an initrd command even if there is no initrd fiel in the BLS file. Resolves: rhbz#1806022 Signed-off-by: Javier Martinez Canillas --- grub-core/commands/blscfg.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/grub-core/commands/blscfg.c b/grub-core/commands/blscfg.c index 24e35a40f24..9263a5c1a02 100644 --- a/grub-core/commands/blscfg.c +++ b/grub-core/commands/blscfg.c @@ -600,6 +600,12 @@ static char **bls_make_list (struct bls_entry *entry, const char *key, int *num) list[nlist] = NULL; } + if (!nlist) + { + grub_free (list); + return NULL; + } + if (num) *num = nlist;