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qemu-img: Use qemu_strtoul() rather than raw strtoul() 

Some of the argument parsing in qemu-img uses strtoul() to parse
integer arguments.  This is tricky to get correct and in fact the
code does not get it right, because it assigns the result of
strtoul() to an 'int' variable and then tries to check for > INT_MAX.
Coverity correctly complains that the comparison is always false.

Rewrite to use qemu_strtoul(), which has a saner convention for
reporting conversion failures.

(Fixes CID 1356421, CID 1356422, CID 1356423.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1486744104-15590-2-git-send-email-peter.maydell@linaro.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Peter Maydell 2017-02-10 16:28:23 +00:00 committed by Max Reitz
parent 3026c4688c
commit 8b3c679228
1 changed files with 16 additions and 16 deletions
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32
qemu-img.c
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@ -3623,24 +3623,24 @@ static int img_bench(int argc, char **argv)
break;
case 'c':
{
char *end;
errno = 0;
count = strtoul(optarg, &end, 0);
if (errno || *end || count > INT_MAX) {
unsigned long res;
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
error_report("Invalid request count specified");
return 1;
}
count = res;
break;
}
case 'd':
{
char *end;
errno = 0;
depth = strtoul(optarg, &end, 0);
if (errno || *end || depth > INT_MAX) {
unsigned long res;
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
error_report("Invalid queue depth specified");
return 1;
}
depth = res;
break;
}
case 'f':
@ -3707,24 +3707,24 @@ static int img_bench(int argc, char **argv)
break;
case OPTION_PATTERN:
{
char *end;
errno = 0;
pattern = strtoul(optarg, &end, 0);
if (errno || *end || pattern > 0xff) {
unsigned long res;
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) {
error_report("Invalid pattern byte specified");
return 1;
}
pattern = res;
break;
}
case OPTION_FLUSH_INTERVAL:
{
char *end;
errno = 0;
flush_interval = strtoul(optarg, &end, 0);
if (errno || *end || flush_interval > INT_MAX) {
unsigned long res;
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) {
error_report("Invalid flush interval specified");
return 1;
}
flush_interval = res;
break;
}
case OPTION_NO_DRAIN: