From 452bd4079b4b6e8a407c724c852ea48de90f8b24 Mon Sep 17 00:00:00 2001
From: Song Liu <song@kernel.org>
Date: Tue, 10 Sep 2024 22:55:08 -0700
Subject: [PATCH] bpf: lsm: Set bpf_lsm_blob_sizes.lbs_task to 0

BugLink: https://bugs.launchpad.net/bugs/2089340

commit 300a90b2cb5d442879e6398920c49aebbd5c8e40 upstream.

bpf task local storage is now using task_struct->bpf_storage, so
bpf_lsm_blob_sizes.lbs_task is no longer needed. Remove it to save some
memory.

Fixes: a10787e6d58c ("bpf: Enable task local storage for tracing programs")
Cc: stable@vger.kernel.org
Cc: KP Singh <kpsingh@kernel.org>
Cc: Matt Bobrowski <mattbobrowski@google.com>
Signed-off-by: Song Liu <song@kernel.org>
Acked-by: Matt Bobrowski <mattbobrowski@google.com>
Link: https://lore.kernel.org/r/20240911055508.9588-1-song@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
---
 security/bpf/hooks.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/security/bpf/hooks.c b/security/bpf/hooks.c
index 2da40774dd20..47e0ffb0b442 100644
--- a/security/bpf/hooks.c
+++ b/security/bpf/hooks.c
@@ -32,7 +32,6 @@ static int __init bpf_lsm_init(void)
 
 struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
 	.lbs_inode = sizeof(struct bpf_storage_blob),
-	.lbs_task = sizeof(struct bpf_storage_blob),
 };
 
 DEFINE_LSM(bpf) = {