xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: bpf: disable CFI in dispatcher functions

Browse Source 
BPF dispatcher functions are patched at runtime to perform direct
instead of indirect calls. Disable CFI for the dispatcher functions
to avoid conflicts.

Bug: 145210207
Change-Id: Iea72f5a9fe09dd5adbb90b0174945707f42594b0
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Sami Tolvanen
2020-01-29 15:14:14 -08:00
committed by Alistair Delva
parent db36655a24
commit e97c57662c
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/bpf.h
View File

@@ -635,7 +635,7 @@ struct bpf_dispatcher {
struct bpf_ksym ksym;
};
static __always_inline unsigned int bpf_dispatcher_nop_func(
static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
const void *ctx,
const struct bpf_insn *insnsi,
unsigned int (*bpf_func)(const void *,
@@ -663,7 +663,7 @@ void bpf_trampoline_put(struct bpf_trampoline *tr);
}
#define DEFINE_BPF_DISPATCHER(name) \
noinline unsigned int bpf_dispatcher_##name##_func( \
noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
const void *ctx, \
const struct bpf_insn *insnsi, \
unsigned int (*bpf_func)(const void *, \