From 0236ad663f75310e70cdf75630a646c2d8a3e419 Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Mon, 26 Aug 2024 22:40:06 -0300
Subject: [PATCH] syscalls: fix more deadlocks and issues

---
 kernel-src/sys/syscalls/chdir.c    | 2 ++
 kernel-src/sys/syscalls/mount.c    | 3 +++
 kernel-src/sys/syscalls/renameat.c | 2 +-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/kernel-src/sys/syscalls/chdir.c b/kernel-src/sys/syscalls/chdir.c
index 99717999..6170f026 100644
--- a/kernel-src/sys/syscalls/chdir.c
+++ b/kernel-src/sys/syscalls/chdir.c
@@ -33,6 +33,8 @@ syscallret_t syscall_chdir(context_t *, char *upath) {
 	if (ret.errno)
 		goto cleanup;
 
+	VOP_UNLOCK(new);
+
 	if (new->type != V_TYPE_DIR) {
 		ret.errno = ENOTDIR;
 		goto cleanup;
diff --git a/kernel-src/sys/syscalls/mount.c b/kernel-src/sys/syscalls/mount.c
index a5b0f61b..b720e8b1 100644
--- a/kernel-src/sys/syscalls/mount.c
+++ b/kernel-src/sys/syscalls/mount.c
@@ -78,8 +78,11 @@ syscallret_t syscall_mount(context_t *context, char *ubacking, char *umountpoint
 		ret.errno = vfs_lookup(&backingnode, backingrefnode, backing, NULL, 0);
 		if (ret.errno)
 			goto cleanup;
+
+		VOP_UNLOCK(backingnode);
 	}
 
+
 	ret.errno = vfs_mount(backingnode, mountpointrefnode, mountpoint, fs, data);
 	if (ubacking) {
 		VOP_RELEASE(backingnode);
diff --git a/kernel-src/sys/syscalls/renameat.c b/kernel-src/sys/syscalls/renameat.c
index 7f6c6736..8339d6c2 100644
--- a/kernel-src/sys/syscalls/renameat.c
+++ b/kernel-src/sys/syscalls/renameat.c
@@ -60,7 +60,7 @@ syscallret_t syscall_renameat(context_t *context, int olddirfd, char *uoldpath,
 	if (oldcomponent == NULL && newcomponent == NULL)
 		goto cleanup;
 
-	// TODO possibly deadlocks
+	// TODO deadlocks.
 	ret.errno = vfs_lookup(&sourcedirnode, olddirnode, oldpath, oldcomponent, VFS_LOOKUP_NOLINK | VFS_LOOKUP_PARENT);
 	if (ret.errno)
 		goto cleanup;