[PATCH bpf] bpf: Drop task_to_inode and inet_conn_established from lsm sleepable hooks

[Jiayuan Chen]

bpf_lsm_task_to_inode() is called under rcu_read_lock() and
bpf_lsm_inet_conn_established() is called from softirq context, so
neither hook can be used by sleepable LSM programs.

Fixes: 423f16108c9d8 ("bpf: Augment the set of sleepable LSM hooks")
Reported-by: Quan Sun <2022090917019@xxxxxxxxxxxxxxxx>
Reported-by: Yinhao Hu <dddddd@xxxxxxxxxxx>
Reported-by: Kaiyan Mei <M202472210@xxxxxxxxxxx>
Reported-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
Closes: https://lore.kernel.org/bpf/3ab69731-24d1-431a-a351-452aafaaf2a5@xxxxxxxxxxxxxxxx/T/#u
Signed-off-by: Jiayuan Chen <jiayuan.chen@xxxxxxxxx>
---
 kernel/bpf/bpf_lsm.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c
index 0e74325d96a61..c5c925f002021 100644
--- a/kernel/bpf/bpf_lsm.c
+++ b/kernel/bpf/bpf_lsm.c
@@ -359,8 +359,6 @@ BTF_ID(func, bpf_lsm_sb_umount)
 BTF_ID(func, bpf_lsm_settime)
 
 #ifdef CONFIG_SECURITY_NETWORK
-BTF_ID(func, bpf_lsm_inet_conn_established)
-
 BTF_ID(func, bpf_lsm_socket_accept)
 BTF_ID(func, bpf_lsm_socket_bind)
 BTF_ID(func, bpf_lsm_socket_connect)
@@ -381,7 +379,6 @@ BTF_ID(func, bpf_lsm_syslog)
 BTF_ID(func, bpf_lsm_task_alloc)
 BTF_ID(func, bpf_lsm_task_prctl)
 BTF_ID(func, bpf_lsm_task_setscheduler)
-BTF_ID(func, bpf_lsm_task_to_inode)
 BTF_ID(func, bpf_lsm_userns_create)
 BTF_ID(func, bpf_lsm_bdev_alloc_security)
 BTF_ID(func, bpf_lsm_bdev_setintegrity)
-- 
2.43.0