From 098af0f846a87b651731780ff48420205fd33754 Mon Sep 17 00:00:00 2001
From: Tim Schumacher <timschumi@gmx.de>
Date: Mon, 2 May 2022 20:08:17 +0200
Subject: Kernel: Properly define `IOV_MAX`

---
 Kernel/API/POSIX/sys/uio.h | 3 +++
 Kernel/Syscalls/read.cpp   | 3 +--
 Kernel/Syscalls/write.cpp  | 3 +--
 3 files changed, 5 insertions(+), 4 deletions(-)

(limited to 'Kernel')

diff --git a/Kernel/API/POSIX/sys/uio.h b/Kernel/API/POSIX/sys/uio.h
index cbad45055f..be8922ef4f 100644
--- a/Kernel/API/POSIX/sys/uio.h
+++ b/Kernel/API/POSIX/sys/uio.h
@@ -12,6 +12,9 @@
 extern "C" {
 #endif
 
+// Arbitrary pain threshold.
+#define IOV_MAX 1024
+
 struct iovec {
     void* iov_base;
     size_t iov_len;
diff --git a/Kernel/Syscalls/read.cpp b/Kernel/Syscalls/read.cpp
index 1e51933e7c..4392e1f5d9 100644
--- a/Kernel/Syscalls/read.cpp
+++ b/Kernel/Syscalls/read.cpp
@@ -45,8 +45,7 @@ ErrorOr<FlatPtr> Process::sys$readv(int fd, Userspace<const struct iovec*> iov,
     if (iov_count < 0)
         return EINVAL;
 
-    // Arbitrary pain threshold.
-    if (iov_count > (int)MiB)
+    if (iov_count > IOV_MAX)
         return EFAULT;
 
     u64 total_length = 0;
diff --git a/Kernel/Syscalls/write.cpp b/Kernel/Syscalls/write.cpp
index c51e949a3d..d105761ffb 100644
--- a/Kernel/Syscalls/write.cpp
+++ b/Kernel/Syscalls/write.cpp
@@ -18,8 +18,7 @@ ErrorOr<FlatPtr> Process::sys$writev(int fd, Userspace<const struct iovec*> iov,
     if (iov_count < 0)
         return EINVAL;
 
-    // Arbitrary pain threshold.
-    if (iov_count > (int)MiB)
+    if (iov_count > IOV_MAX)
         return EFAULT;
 
     u64 total_length = 0;
-- 
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