Le 26/03/2021 à 05:05, Zach Reizner a écrit :
> The kernel allows a NULL msg in recvfrom so that he size of the next
> message may be queried before allocating a correctly sized buffer. This
> change allows the syscall translator to pass along the NULL msg pointer
> instead of returning early with EFAULT.
>
> Signed-off-by: Zach Reizner <za...@google.com>
> ---
> linux-user/syscall.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 1e508576c7..332544b43c 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -3680,8 +3680,6 @@ static abi_long do_recvfrom(int fd, abi_ulong
> msg, size_t len, int flags,
> abi_long ret;
>
> host_msg = lock_user(VERIFY_WRITE, msg, len, 0);
> - if (!host_msg)
> - return -TARGET_EFAULT;
> if (target_addr) {
> if (get_user_u32(addrlen, target_addrlen)) {
> ret = -TARGET_EFAULT;
>
Reviewed-by: Laurent Vivier <laur...@vivier.eu>
