bpf, lsm: Mark the BPF LSM hook overrides noinline

The stubs that bpf_lsm_proto.c overrides are generated as:

  #define LSM_HOOK(RET, DEFAULT, NAME, ...)     \
  __weak noinline RET bpf_lsm_##NAME(__VA_ARGS__)       \
  {                                             \
          return DEFAULT;                       \
  }

Mark the overrides noinline as well so they hold up the same contract
as the stubs they replace.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260915150739.284189-6-daniel@iogearbox.net

1 files changed, 6 insertions, 6 deletions

diff --git a/kernel/bpf/bpf_lsm_proto.c b/kernel/bpf/bpf_lsm_proto.c
index 4a776df76cbb..b81179ae2e08 100644
--- a/kernel/bpf/bpf_lsm_proto.c
+++ b/kernel/bpf/bpf_lsm_proto.c
@@ -13,8 +13,8 @@
  * explicitly enforces that BPF LSM programs check for NULL before attempting to
  * dereference it.
  */
-int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot,
-		      unsigned long prot, unsigned long flags)
+noinline int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot,
+			       unsigned long prot, unsigned long flags)
 {
 	return 0;
 }
@@ -25,10 +25,10 @@ int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot,
  * suffix marks it as PTR_MAYBE_NULL. BPF LSM programs have to check before
  * dereferencing them or handing them to bpf_inode_init_xattr().
  */
-int bpf_lsm_inode_init_security(struct inode *inode, struct inode *dir,
-				const struct qstr *qstr__nullable,
-				struct xattr *xattrs__nullable,
-				int *xattr_count)
+noinline int bpf_lsm_inode_init_security(struct inode *inode, struct inode *dir,
+					 const struct qstr *qstr__nullable,
+					 struct xattr *xattrs__nullable,
+					 int *xattr_count)
 {
 	return -EOPNOTSUPP;
 }