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Re: [PATCH v2 9/9] bsd-user/mmap.c: assert that target_mprotect cannot f


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH v2 9/9] bsd-user/mmap.c: assert that target_mprotect cannot fail
Date: Sat, 25 Sep 2021 12:58:31 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0

On 9/22/21 06:56, Warner Losh wrote:
Similar to the equivalent linux-user change 86abac06c14. All error
conditions that target_mprotect checks are also checked by target_mmap.
EACCESS cannot happen because we are just removing PROT_WRITE.  ENOMEM
should not happen because we are modifying a whole VMA (and we have
bigger problems anyway if it happens).

Fixes a Coverity false positive, where Coverity complains about
target_mprotect's return value being passed to tb_invalidate_phys_range.

Signed-off-by: Mikaël Urankar <mikael.urankar@gmail.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
  bsd-user/mmap.c | 5 +----
  1 file changed, 1 insertion(+), 4 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>



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