From 5f9338ad56e6b1168905e73ecfcd5e1b7b1a32e2 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Fri, 30 Jul 2021 14:23:54 +0200 Subject: [PATCH] fastboot: fix partition name truncation in environment lookup strlcat() need to be passed the full buffer length. The incorrect call caused truncation of partition names for fastboot_raw_partition_... and fastboot_partition_alias_... env lookup to much less than PART_NAME_LEN. Fixes: 69a752983171 ("fastboot: Fix possible buffer overrun") Signed-off-by: Matthias Schiffer Reviewed-by: Sean Anderson --- drivers/fastboot/fb_mmc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c index cbb3f7b1de..2738dc836e 100644 --- a/drivers/fastboot/fb_mmc.c +++ b/drivers/fastboot/fb_mmc.c @@ -40,7 +40,7 @@ static int raw_part_get_info_by_name(struct blk_desc *dev_desc, /* check for raw partition descriptor */ strcpy(env_desc_name, "fastboot_raw_partition_"); - strlcat(env_desc_name, name, PART_NAME_LEN); + strlcat(env_desc_name, name, sizeof(env_desc_name)); raw_part_desc = strdup(env_get(env_desc_name)); if (raw_part_desc == NULL) return -ENODEV; @@ -114,7 +114,7 @@ static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc, /* check for alias */ strcpy(env_alias_name, "fastboot_partition_alias_"); - strlcat(env_alias_name, name, PART_NAME_LEN); + strlcat(env_alias_name, name, sizeof(env_alias_name)); aliased_part_name = env_get(env_alias_name); if (aliased_part_name != NULL) ret = do_get_part_info(dev_desc, aliased_part_name, -- 2.39.5