git: 412b95f77d99 - stable/13 - cuse(3): Make cuse_vmfree() NULL safe.

The branch stable/13 has been updated by hselasky:

URL: https://cgit.FreeBSD.org/src/commit/?id=412b95f77d9961babfc23b75190e60f86ff42225

commit 412b95f77d9961babfc23b75190e60f86ff42225
Author:     Hans Petter Selasky <hselasky@FreeBSD.org>
AuthorDate: 2022-07-13 15:54:24 +0000
Commit:     Hans Petter Selasky <hselasky@FreeBSD.org>
CommitDate: 2022-07-27 09:33:51 +0000

    cuse(3): Make cuse_vmfree() NULL safe.
    
    Sponsored by:   NVIDIA Networking
    
    (cherry picked from commit 2ca43c3dba1b818db9245027c87fddfc9d4be0a6)
---
 lib/libcuse/cuse.3     | 1 +
 lib/libcuse/cuse_lib.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/libcuse/cuse.3 b/lib/libcuse/cuse.3
index 74888a687be8..aab8ebb4d4f4 100644
--- a/lib/libcuse/cuse.3
+++ b/lib/libcuse/cuse.3
@@ -136,6 +136,7 @@ Else this function returns zero.
 .Fn "cuse_vmfree" "void *"
 This function frees memory allocated by
 .Fn cuse_vmalloc .
+This function is NULL safe.
 Note that the
 cuse library will internally not free the memory until the
 .Fn cuse_uninit
diff --git a/lib/libcuse/cuse_lib.c b/lib/libcuse/cuse_lib.c
index fda0c96d0d70..d241ce1dc4ac 100644
--- a/lib/libcuse/cuse_lib.c
+++ b/lib/libcuse/cuse_lib.c
@@ -269,7 +269,7 @@ cuse_vmfree(void *ptr)
 	int error;
 	int n;
 
-	if (f_cuse < 0)
+	if (f_cuse < 0 || ptr == NULL)
 		return;
 
 	CUSE_LOCK();