git: 7a9378856ae0 - stable/15 - kern_jail_set(): do not double-free opts

The branch stable/15 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=7a9378856ae0b20e4d7330ab67cf02880db69afe

commit 7a9378856ae0b20e4d7330ab67cf02880db69afe
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2025-11-06 05:50:42 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-11-09 00:35:52 +0000

    kern_jail_set(): do not double-free opts
    
    (cherry picked from commit 3f5f52216f7e583aeb5580b13ba0f87e29d1ee43)
---
 sys/kern/kern_jail.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
index 523b7e314a10..26a994ef0c32 100644
--- a/sys/kern/kern_jail.c
+++ b/sys/kern/kern_jail.c
@@ -1065,8 +1065,10 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
 	 *     than duplicate it under a different name.
 	 */
 	error = vfs_buildopts(optuio, &opts);
-	if (error)
+	if (error) {
+		opts = NULL;
 		goto done_free;
+	}
 
 	cuflags = flags & (JAIL_CREATE | JAIL_UPDATE);
 	if (!cuflags) {
@@ -2331,7 +2333,8 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
 		(void)kern_close(td, jfd_out);
 	if (g_path != NULL)
 		free(g_path, M_TEMP);
-	vfs_freeopts(opts);
+	if (opts != NULL)
+		vfs_freeopts(opts);
 	prison_free(mypr);
 	return (error);
 }