From f88e08f34d2d4f398f23797707e1c50cd306e405 Mon Sep 17 00:00:00 2001
From: Bernd Schubert <bschubert@ddn.com>
Date: Tue, 25 Jun 2024 07:05:19 +0200
Subject: [PATCH] Add nullptr check in fuse_session_mount

The pointer did not have any sanity check.

Addresses https://github.com/libfuse/libfuse/issues/979

---
 lib/fuse_lowlevel.c | 5 +++++
 lib/mount_util.c    | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index fdef193..47c3065 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -3145,6 +3145,11 @@ int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
 {
 	int fd;
 
+	if (mountpoint == NULL) {
+		fuse_log(FUSE_LOG_ERR, "Invalid null-ptr mountpoint!\n");
+		return -1;
+	}
+
 	/*
 	 * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
 	 * would ensue.
diff --git a/lib/mount_util.c b/lib/mount_util.c
index 8027a2e..c90ba92 100644
--- a/lib/mount_util.c
+++ b/lib/mount_util.c
@@ -363,6 +363,11 @@ int fuse_mnt_parse_fuse_fd(const char *mountpoint)
 	int fd = -1;
 	int len = 0;
 
+	if (mountpoint == NULL) {
+		fprintf(stderr, "Invalid null-ptr mount-point!\n");
+		return -1;
+	}
+
 	if (sscanf(mountpoint, "/dev/fd/%u%n", &fd, &len) == 1 &&
 	    len == strlen(mountpoint)) {
 		return fd;
-- 
2.27.0