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spotfilter: add a maissing v5.4 kernel backport

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fixes an off-by-one bug in the validator

Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
John Crispin
2022-09-23 10:35:52 +02:00
parent 854c8a44d4
commit 47468145c6
1 changed files with 33 additions and 0 deletions
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33
patches/backports/0037-backport-5.4-add-a-BPF-off-by-one-fix.patch Normal file
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@@ -0,0 +1,33 @@
From 1ac3763815e804eacc0977afb420f015a78f8d72 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Fri, 23 Sep 2022 08:48:38 +0200
Subject: [PATCH] backport-5.4: add a BPF off-by-one fix
Signed-off-by: John Crispin <john@phrozen.org>
---
.../backport-5.4/999-bpf-off-by-one-backport.patch | 13 +++++++++++++
1 file changed, 13 insertions(+)
create mode 100644 target/linux/generic/backport-5.4/999-bpf-off-by-one-backport.patch
diff --git a/target/linux/generic/backport-5.4/999-bpf-off-by-one-backport.patch b/target/linux/generic/backport-5.4/999-bpf-off-by-one-backport.patch
new file mode 100644
index 0000000000..271eac67da
--- /dev/null
+++ b/target/linux/generic/backport-5.4/999-bpf-off-by-one-backport.patch
@@ -0,0 +1,13 @@
+Index: linux-5.4.158/kernel/bpf/verifier.c
+===================================================================
+--- linux-5.4.158.orig/kernel/bpf/verifier.c
++++ linux-5.4.158/kernel/bpf/verifier.c
+@@ -5372,7 +5372,7 @@ static void find_good_pkt_pointers(struc
+
+ new_range = dst_reg->off;
+ if (range_right_open)
+- new_range--;
++ new_range++;
+
+ /* Examples for register markings:
+ *
--
2.25.1