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Kernel: Make copy_{from,to}_user() return KResult and use TRY()

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This makes EFAULT propagation flow much more naturally. :^)
This commit is contained in:
Andreas Kling 2021-09-05 17:38:37 +02:00
parent 9903f5c6ef
commit 48a0b31c47
57 changed files with 318 additions and 551 deletions
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6
Kernel/Syscalls/link.cpp
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@ -15,8 +15,7 @@ KResultOr<FlatPtr> Process::sys$link(Userspace<const Syscall::SC_link_params*> u
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(cpath);
Syscall::SC_link_params params;
if (!copy_from_user(&params, user_params))
return EFAULT;
TRY(copy_from_user(&params, user_params));
auto old_path = TRY(try_copy_kstring_from_user(params.old_path));
auto new_path = TRY(try_copy_kstring_from_user(params.new_path));
return VirtualFileSystem::the().link(old_path->view(), new_path->view(), current_directory());
@ -27,8 +26,7 @@ KResultOr<FlatPtr> Process::sys$symlink(Userspace<const Syscall::SC_symlink_para
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(cpath);
Syscall::SC_symlink_params params;
if (!copy_from_user(&params, user_params))
return EFAULT;
TRY(copy_from_user(&params, user_params));
auto target = TRY(get_syscall_path_argument(params.target));
auto linkpath = TRY(get_syscall_path_argument(params.linkpath));
return VirtualFileSystem::the().symlink(target->view(), linkpath->view(), current_directory());