From: Matt Bobrowski <mattbobrowski@google.com>
To: kpsingh@kernel.org, ast@kernel.org, andrii@kernel.org
Cc: revest@chromium.org, jackmanb@chromium.org,
yonghong.song@linux.dev, gnoack@google.com, bpf@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: [PATCH bpf-next] bpf: add security_file_mprotect() to sleepable_lsm_hooks BTF set
Date: Thu, 1 Feb 2024 10:43:52 +0000 [thread overview]
Message-ID: <Zbt16HS-9x8YPZNz@google.com> (raw)
security_file_mprotect() is missing from the sleepable_lsm_hooks BTF
set. Add it so that operations performed by a BPF program which may
result in the thread being put to sleep are permitted.
Building a kernel with the DEBUG_ATOMIC_SLEEP confiuration option
enabled and running reasonable workloads stimulating a BPF program
attached to security_file_mprotect() which could end up performing an
operation that could sleep resulted in no splats.
Signed-off-by: Matt Bobrowski <mattbobrowski@google.com>
---
kernel/bpf/bpf_lsm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c
index 68240c3c6e7d..da52c955f3ca 100644
--- a/kernel/bpf/bpf_lsm.c
+++ b/kernel/bpf/bpf_lsm.c
@@ -277,10 +277,13 @@ BTF_ID(func, bpf_lsm_bprm_creds_from_file)
BTF_ID(func, bpf_lsm_capget)
BTF_ID(func, bpf_lsm_capset)
BTF_ID(func, bpf_lsm_cred_prepare)
+
BTF_ID(func, bpf_lsm_file_ioctl)
BTF_ID(func, bpf_lsm_file_lock)
BTF_ID(func, bpf_lsm_file_open)
BTF_ID(func, bpf_lsm_file_receive)
+BTF_ID(func, bpf_lsm_mmap_file)
+BTF_ID(func, bpf_lsm_file_mprotect)
BTF_ID(func, bpf_lsm_inode_create)
BTF_ID(func, bpf_lsm_inode_free_security)
@@ -316,7 +319,6 @@ BTF_ID(func, bpf_lsm_path_chown)
BTF_ID(func, bpf_lsm_key_free)
#endif /* CONFIG_KEYS */
-BTF_ID(func, bpf_lsm_mmap_file)
BTF_ID(func, bpf_lsm_netlink_send)
BTF_ID(func, bpf_lsm_path_notify)
BTF_ID(func, bpf_lsm_release_secctx)
--
2.43.0.429.g432eaa2c6b-goog
/M
next reply other threads:[~2024-02-01 10:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-01 10:43 Matt Bobrowski [this message]
2024-02-01 13:38 ` [PATCH bpf-next] bpf: add security_file_mprotect() to sleepable_lsm_hooks BTF set Matt Bobrowski
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