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ioctl_va bug fix #665.

This commit is contained in:
fengbojiang 2022-07-05 17:43:39 +08:00
parent f211ded4ff
commit a093c79733
1 changed files with 2 additions and 3 deletions
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5
tools/compat/ioctl.c
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@ -114,7 +114,7 @@ ioctl_va(int fd, unsigned long com, void *data, int argc, ...)
msg->ioctl.cmd = com;
msg->ioctl.data = msg->buf_addr;
memcpy(msg->ioctl.data, data, size);
msg->buf_addr += size;
char *buf_addr = msg->buf_addr + size;
if (argc == 3) {
if (size + clen > msg->buf_len) {
@ -123,7 +123,6 @@ ioctl_va(int fd, unsigned long com, void *data, int argc, ...)
return -1;
}
char *ptr = (char *)(msg->ioctl.data) + offset;
char *buf_addr = msg->buf_addr;
memcpy(ptr, &buf_addr, sizeof(char *));
memcpy(buf_addr, cpy_mem, clen);
}
@ -152,7 +151,7 @@ ioctl_va(int fd, unsigned long com, void *data, int argc, ...)
if (com & IOC_OUT) {
memcpy(data, retmsg->ioctl.data, size);
if (argc == 3) {
memcpy(cpy_mem, retmsg->buf_addr, clen);
memcpy(cpy_mem, buf_addr, clen);
char *ptr = (char *)data + offset;
memcpy(ptr, &cpy_mem, sizeof(void *));
}