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mkeficapsule: Miscellaneous fixes in the utility

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Miscellaneous fixes in the mkeficapsule utility -- these include a few
resource leak issues flagged by Coverity along with some additional
code improvements suggested by Heinrich during code review.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
This commit is contained in:
Sughosh Ganu 2021-01-22 20:34:56 +05:30 committed by Heinrich Schuchardt
parent f7cd8b7b55
commit d33f31816f
1 changed files with 23 additions and 15 deletions
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38
tools/mkeficapsule.c
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@ -137,8 +137,8 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
bool overlay)
{
int ret;
int srcfd = 0;
int destfd = 0;
int srcfd = -1;
int destfd = -1;
void *sptr = NULL;
void *dptr = NULL;
off_t src_size;
@ -150,6 +150,7 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (srcfd == -1) {
fprintf(stderr, "%s: Can't open %s: %s\n",
__func__, pkey_file, strerror(errno));
ret = -1;
goto err;
}
@ -157,6 +158,7 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (ret == -1) {
fprintf(stderr, "%s: Can't stat %s: %s\n",
__func__, pkey_file, strerror(errno));
ret = -1;
goto err;
}
@ -164,9 +166,10 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
/* mmap the public key esl file */
sptr = mmap(0, src_size, PROT_READ, MAP_SHARED, srcfd, 0);
if ((sptr == MAP_FAILED) || (errno != 0)) {
if (sptr == MAP_FAILED) {
fprintf(stderr, "%s: Failed to mmap %s:%s\n",
__func__, pkey_file, strerror(errno));
ret = -1;
goto err;
}
@ -175,6 +178,7 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (destfd == -1) {
fprintf(stderr, "%s: Can't open %s: %s\n",
__func__, dtb_file, strerror(errno));
ret = -1;
goto err;
}
@ -189,21 +193,24 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (ftruncate(destfd, dtb.st_size)) {
fprintf(stderr, "%s: Can't expand %s: %s\n",
__func__, dtb_file, strerror(errno));
goto err;;
ret = -1;
goto err;
}
errno = 0;
/* mmap the dtb file */
dptr = mmap(0, dtb.st_size, PROT_READ | PROT_WRITE, MAP_SHARED,
destfd, 0);
if ((dptr == MAP_FAILED) || (errno != 0)) {
if (dptr == MAP_FAILED) {
fprintf(stderr, "%s: Failed to mmap %s:%s\n",
__func__, dtb_file, strerror(errno));
ret = -1;
goto err;
}
if (fdt_check_header(dptr)) {
fprintf(stderr, "%s: Invalid FDT header\n", __func__);
ret = -1;
goto err;
}
@ -211,6 +218,7 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (ret) {
fprintf(stderr, "%s: Cannot expand FDT: %s\n",
__func__, fdt_strerror(ret));
ret = -1;
goto err;
}
@ -219,10 +227,11 @@ static int add_public_key(const char *pkey_file, const char *dtb_file,
if (ret < 0) {
fprintf(stderr, "%s: Unable to add public key to the FDT\n",
__func__);
ret = -1;
goto err;
}
return 0;
ret = 0;
err:
if (sptr)
@ -231,13 +240,13 @@ err:
if (dptr)
munmap(dptr, dtb.st_size);
if (srcfd >= 0)
if (srcfd != -1)
close(srcfd);
if (destfd >= 0)
if (destfd != -1)
close(destfd);
return -1;
return ret;
}
static int create_fwbin(char *path, char *bin, efi_guid_t *guid,
@ -424,26 +433,25 @@ int main(int argc, char **argv)
/* need a fit image file or raw image file */
if (!file && !pkey_file && !dtb_file) {
printf("%s: %d\n", __func__, __LINE__);
print_usage();
return -1;
exit(EXIT_FAILURE);
}
if (pkey_file && dtb_file) {
ret = add_public_key(pkey_file, dtb_file, overlay);
if (ret == -1) {
printf("Adding public key to the dtb failed\n");
return -1;
exit(EXIT_FAILURE);
} else {
return 0;
exit(EXIT_SUCCESS);
}
}
if (create_fwbin(argv[optind], file, guid, index, instance)
< 0) {
printf("Creating firmware capsule failed\n");
return -1;
exit(EXIT_FAILURE);
}
return 0;
exit(EXIT_SUCCESS);
}