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kwbimage: check fopen() return value

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Always check the return value of fopen().

This resolves Coverity CID 338491:
Null pointer dereferences (NULL_RETURNS)

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Pali Rohár <pali@kernel.org>
This commit is contained in:
Heinrich Schuchardt 2021-08-17 07:03:20 +02:00 • committed by Stefan Roese
parent e23162c805
commit f858bb2e6c
1 changed files with 11 additions and 0 deletions
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11
tools/kwbimage.c
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@ -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");