From: Gaosheng Cui cuigaosheng1@huawei.com
commit ad982c3be4e60c7d39c03f782733503cbd88fd2a upstream.
Audit_alloc_mark() assign pathname to audit_mark->path, on error path from fsnotify_add_inode_mark(), fsnotify_put_mark will free memory of audit_mark->path, but the caller of audit_alloc_mark will free the pathname again, so there will be double free problem.
Fix this by resetting audit_mark->path to NULL pointer on error path from fsnotify_add_inode_mark().
Cc: stable@vger.kernel.org Fixes: 7b1293234084d ("fsnotify: Add group pointer in fsnotify_init_mark()") Signed-off-by: Gaosheng Cui cuigaosheng1@huawei.com Reviewed-by: Jan Kara jack@suse.cz Signed-off-by: Paul Moore paul@paul-moore.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/audit_fsnotify.c | 1 + 1 file changed, 1 insertion(+)
--- a/kernel/audit_fsnotify.c +++ b/kernel/audit_fsnotify.c @@ -111,6 +111,7 @@ struct audit_fsnotify_mark *audit_alloc_
ret = fsnotify_add_mark(&audit_mark->mark, inode, NULL, true); if (ret < 0) { + audit_mark->path = NULL; fsnotify_put_mark(&audit_mark->mark); audit_mark = ERR_PTR(ret); }