From f34bc166b1b2e804d2fba920043f1c2b20ca6296 Mon Sep 17 00:00:00 2001
From: Antonio SJ Musumeci <trapexit@spawn.link>
Date: Mon, 9 Mar 2026 22:40:46 -0500
Subject: [PATCH] Add null pointer checks for FileInfo/DirInfo

---
 src/fuse_copy_file_range.cpp | 5 +++++
 src/fuse_flush.cpp           | 3 +++
 src/fuse_fsync.cpp           | 3 +++
 src/fuse_fsyncdir.cpp        | 3 +++
 4 files changed, 14 insertions(+)

diff --git a/src/fuse_copy_file_range.cpp b/src/fuse_copy_file_range.cpp
index 300b8359..c186e046 100644
--- a/src/fuse_copy_file_range.cpp
+++ b/src/fuse_copy_file_range.cpp
@@ -60,6 +60,11 @@ FUSE::copy_file_range(const fuse_req_ctx_t   *ctx_,
   FileInfo *src_fi = FileInfo::from_fh(src_ffi_->fh);
   FileInfo *dst_fi = FileInfo::from_fh(dst_ffi_->fh);
 
+  if(not src_fi)
+    return -EBADF;
+  if(not dst_fi)
+    return -EBADF;
+
   return ::_copy_file_range(src_fi->fd,
                             src_off_,
                             dst_fi->fd,
diff --git a/src/fuse_flush.cpp b/src/fuse_flush.cpp
index 8aa3d788..666c8fb3 100644
--- a/src/fuse_flush.cpp
+++ b/src/fuse_flush.cpp
@@ -45,5 +45,8 @@ FUSE::flush(const fuse_req_ctx_t   *ctx_,
 {
   FileInfo *fi = FileInfo::from_fh(ffi_->fh);
 
+  if(not fi)
+    return -EBADF;
+
   return ::_flush(fi->fd);
 }
diff --git a/src/fuse_fsync.cpp b/src/fuse_fsync.cpp
index 9dc18ddd..8ae48331 100644
--- a/src/fuse_fsync.cpp
+++ b/src/fuse_fsync.cpp
@@ -51,5 +51,8 @@ FUSE::fsync(const fuse_req_ctx_t *ctx_,
 {
   FileInfo *fi = FileInfo::from_fh(fh_);
 
+  if(not fi)
+    return -EBADF;
+
   return ::_fsync(fi->fd,isdatasync_);
 }
diff --git a/src/fuse_fsyncdir.cpp b/src/fuse_fsyncdir.cpp
index fcb17cef..1079b62f 100644
--- a/src/fuse_fsyncdir.cpp
+++ b/src/fuse_fsyncdir.cpp
@@ -43,5 +43,8 @@ FUSE::fsyncdir(const fuse_req_ctx_t   *ctx_,
 {
   DirInfo *di = DirInfo::from_fh(ffi_->fh);
 
+  if(not di)
+    return -EBADF;
+
   return ::_fsyncdir(di,isdatasync_);
 }