diff mbox series

[bpf-next,01/13] bpf: Save PTR_TO_BTF_ID register state when spilling to stack

Message ID 20191214004738.1652239-1-kafai@fb.com
State Changes Requested
Delegated to: BPF Maintainers
Headers show
Series Introduce BPF STRUCT_OPS | expand

Commit Message

Martin KaFai Lau Dec. 14, 2019, 12:47 a.m. UTC 
This patch makes the verifier save the PTR_TO_BTF_ID register state when
spilling to the stack.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
---
 kernel/bpf/verifier.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Yonghong Song Dec. 16, 2019, 7:48 p.m. UTC | #1 
On 12/13/19 4:47 PM, Martin KaFai Lau wrote:
> This patch makes the verifier save the PTR_TO_BTF_ID register state when
> spilling to the stack.
> 
> Signed-off-by: Martin KaFai Lau <kafai@fb.com>

Acked-by: Yonghong Song <yhs@fb.com>
diff mbox series

Patch

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 034ef81f935b..408264c1d55b 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1915,6 +1915,7 @@  static bool is_spillable_regtype(enum bpf_reg_type type)
 	case PTR_TO_TCP_SOCK:
 	case PTR_TO_TCP_SOCK_OR_NULL:
 	case PTR_TO_XDP_SOCK:
+	case PTR_TO_BTF_ID:
 		return true;
 	default:
 		return false;