Re: [PATCH] linux-user/mmap.c: fix integer underflow in target_mremap

[Laurent Vivier]

Hi,

does this patch replace your previous one?

Please add more details in the description, as you did in the launchpad bug.

You can also add:
Fixes: https://bugs.launchpad.net/bugs/1876373

You must also send the patch to address@hidden

Thanks,
Laurent

Le 02/05/2020 à 09:49, Jonathan Marler a écrit :
> Signed-off-by: Jonathan Marler <address@hidden>
> ---
>  linux-user/mmap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/linux-user/mmap.c b/linux-user/mmap.c
> index e378033797..caab62909e 100644
> --- a/linux-user/mmap.c
> +++ b/linux-user/mmap.c
> @@ -708,7 +708,7 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong 
> old_size,
>          if (prot == 0) {
>              host_addr = mremap(g2h(old_addr), old_size, new_size, flags);
>              if (host_addr != MAP_FAILED && reserved_va && old_size > 
> new_size) {
> -                mmap_reserve(old_addr + old_size, new_size - old_size);
> +                mmap_reserve(old_addr + old_size, old_size - new_size);
>              }
>          } else {
>              errno = ENOMEM;
>