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Make sure we don't read too much

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This commit is contained in:
Wim Taymans 2020-05-20 13:59:55 +02:00
parent 236ebeeb68
commit ce98162ed2
2 changed files with 5 additions and 3 deletions
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6
src/modules/module-access.c
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@ -53,6 +53,7 @@ struct impl {
static int check_cmdline(struct pw_impl_client *client, int pid, const char *str)
{
char path[2048];
ssize_t len;
int fd;
sprintf(path, "/proc/%u/cmdline", pid);
@ -61,10 +62,11 @@ static int check_cmdline(struct pw_impl_client *client, int pid, const char *str
if (fd < 0)
return -errno;
if (read(fd, path, 1024) <= 0) {
if ((len = read(fd, path, sizeof(path)-1)) < 0) {
close(fd);
return -EIO;
return -errno;
}
path[len] = '\0';
if (strcmp(path, str) == 0) {
close(fd);