RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 23:47:45 +00:00
Code Issues Activity Actions

Kernel: Disallow empty ranges in munmap/mprotect/madvise

Browse source
This commit is contained in:
Andreas Kling 2020-01-30 21:55:49 +01:00
parent bf5b7c32d8
commit 6634da31d9
1 changed files with 9 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Kernel/Process.cpp
View file

@ -458,6 +458,9 @@ int Process::sys$munmap(void* addr, size_t size)
{ {
REQUIRE_PROMISE(stdio); REQUIRE_PROMISE(stdio);
if (!size)
return -EINVAL;
if (!is_user_range(VirtualAddress(addr), size)) if (!is_user_range(VirtualAddress(addr), size))
return -EFAULT; return -EFAULT;
@ -499,6 +502,9 @@ int Process::sys$mprotect(void* addr, size_t size, int prot)
{ {
REQUIRE_PROMISE(stdio); REQUIRE_PROMISE(stdio);
if (!size)
return -EINVAL;
if (!is_user_range(VirtualAddress(addr), size)) if (!is_user_range(VirtualAddress(addr), size))
return -EFAULT; return -EFAULT;
@ -566,6 +572,9 @@ int Process::sys$madvise(void* address, size_t size, int advice)
{ {
REQUIRE_PROMISE(stdio); REQUIRE_PROMISE(stdio);
if (!size)
return -EINVAL;
if (!is_user_range(VirtualAddress(address), size)) if (!is_user_range(VirtualAddress(address), size))
return -EFAULT; return -EFAULT;