From f858bb2e6c191da3981838937950cb3c98e488fe Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Tue, 17 Aug 2021 07:03:20 +0200 Subject: [PATCH] kwbimage: check fopen() return value MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Always check the return value of fopen(). This resolves Coverity CID 338491: Null pointer dereferences (NULL_RETURNS) Signed-off-by: Heinrich Schuchardt Reviewed-by: Stefan Roese Reviewed-by: Pali Rohár --- tools/kwbimage.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/kwbimage.c b/tools/kwbimage.c index 9fab04ce88..b2694888d9 100644 --- a/tools/kwbimage.c +++ b/tools/kwbimage.c @@ -832,6 +832,12 @@ static int kwb_dump_fuse_cmds(struct secure_hdr_v1 *sec_hdr) if (!strcmp(e->name, "a38x")) { FILE *out = fopen("kwb_fuses_a38x.txt", "w+"); + if (!out) { + fprintf(stderr, "Couldn't open eFuse settings: '%s': %s\n", + "kwb_fuses_a38x.txt", strerror(errno)); + return -ENOENT; + } + kwb_dump_fuse_cmds_38x(out, sec_hdr); fclose(out); goto done; @@ -1060,6 +1066,11 @@ int export_pub_kak_hash(RSA *kak, struct secure_hdr_v1 *secure_hdr) int res; hashf = fopen("pub_kak_hash.txt", "w"); + if (!hashf) { + fprintf(stderr, "Couldn't open hash file: '%s': %s\n", + "pub_kak_hash.txt", strerror(errno)); + return 1; + } res = kwb_export_pubkey(kak, &secure_hdr->kak, hashf, "KAK"); -- 2.39.5