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Kernel: Resolve relative paths when there is a veil (#1474)

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This commit is contained in:
Alex Muscar
2020-03-19 08:57:34 +00:00
committed by GitHub
parent 6d26714ded
commit d013753f83
3 changed files with 23 additions and 4 deletions
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12
Kernel/Process.cpp
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@@ -4772,6 +4772,14 @@ int Process::sys$unveil(const Syscall::SC_unveil_params* user_params)
if (path.value().is_empty() || path.value().characters()[0] != '/')
return -EINVAL;
auto custody_or_error = VFS::the().resolve_path_without_veil(path.value(), root_directory());
if (custody_or_error.is_error())
// FIXME Should this be EINVAL?
return custody_or_error.error();
auto& custody = custody_or_error.value();
auto new_unveiled_path = custody->absolute_path();
auto permissions = validate_and_copy_string_from_user(params.permissions);
if (permissions.is_null())
return -EFAULT;
@@ -4798,7 +4806,7 @@ int Process::sys$unveil(const Syscall::SC_unveil_params* user_params)
for (size_t i = 0; i < m_unveiled_paths.size(); ++i) {
auto& unveiled_path = m_unveiled_paths[i];
if (unveiled_path.path == path.value()) {
if (unveiled_path.path == new_unveiled_path) {
if (new_permissions & ~unveiled_path.permissions)
return -EPERM;
unveiled_path.permissions = new_permissions;
@@ -4806,7 +4814,7 @@ int Process::sys$unveil(const Syscall::SC_unveil_params* user_params)
}
}
m_unveiled_paths.append({ path.value(), new_permissions });
m_unveiled_paths.append({ new_unveiled_path, new_permissions });
ASSERT(m_veil_state != VeilState::Locked);
m_veil_state = VeilState::Dropped;
return 0;