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[v4,net-next,13/13] bpf/verifier: increase complexity limit to 128k

Message ID 059b056e-178a-da21-cc68-47802eba29a3@solarflare.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Edward Cree Aug. 3, 2017, 4:16 p.m. UTC
The more detailed value tracking can reduce the effectiveness of pruning
 for some programs.  So, to avoid rejecting previously valid programs, up
 the limit to 128kinsns.  Hopefully we will be able to bring this back
 down later by improving pruning performance.

Signed-off-by: Edward Cree <ecree@solarflare.com>
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 2924b01..2cc3894 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -140,7 +140,7 @@  struct bpf_verifier_stack_elem {
 	struct bpf_verifier_stack_elem *next;
 };
 
-#define BPF_COMPLEXITY_LIMIT_INSNS	98304
+#define BPF_COMPLEXITY_LIMIT_INSNS	131072
 #define BPF_COMPLEXITY_LIMIT_STACK	1024
 
 #define BPF_MAP_PTR_POISON ((void *)0xeB9F + POISON_POINTER_DELTA)