Re: [Qemu-devel] [PATCH v5 07/10] linux-user: check return value of malloc()

[Riku Voipio <riku.voipio@iki.fi>]

On Mon, Aug 11, 2014 at 04:53:06PM +0800, zhanghailiang wrote:
> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>

Acked-by: Riku Voipio <riku.voipio@linaro.org>
> ---
>  linux-user/syscall.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index a50229d..8e5ccf1 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -2870,6 +2870,10 @@ static inline abi_long do_msgsnd(int msqid, abi_long msgp,
>      if (!lock_user_struct(VERIFY_READ, target_mb, msgp, 0))
>          return -TARGET_EFAULT;
>      host_mb = malloc(msgsz+sizeof(long));
> +    if (!host_mb) {
> +        unlock_user_struct(target_mb, msgp, 0);
> +        return -TARGET_ENOMEM;
> +    }
>      host_mb->mtype = (abi_long) tswapal(target_mb->mtype);
>      memcpy(host_mb->mtext, target_mb->mtext, msgsz);
>      ret = get_errno(msgsnd(msqid, host_mb, msgsz, msgflg));
> -- 
> 1.7.12.4
> 
>