Re: [PATCH v3 7/9] bsd-user/mmap.c: Don't mmap fd == -1 independently from MAP_ANON flag

[Richard Henderson]

On 10/8/21 2:23 PM, Warner Losh wrote:
> From: Guy Yur<guyyur@gmail.com>
>
> Switch checks for !(flags & MAP_ANONYMOUS) with checks for fd != -1.
> MAP_STACK and MAP_GUARD both require fd == -1 and don't require mapping
> the fd either. Add analysis from Guy Yur detailing the different cases
> for MAP_GUARD and MAP_STACK.
>
> Signed-off-by: Guy Yur<guyyur@gmail.com>
> [ partially merged before, finishing the job and documenting origin]
> Signed-off-by: Warner Losh<imp@bsdimp.com>
> ---
>   bsd-user/mmap.c | 30 +++++++++++++++++++++++++-----
>   1 file changed, 25 insertions(+), 5 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~