update to version 1.0.7
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From 9a20f17a7a82ce5ba47047e6c3d2fc921cc1087d Mon Sep 17 00:00:00 2001
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From: Xiao Liang <shaw.leon@gmail.com>
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Date: Fri, 19 Aug 2022 10:40:23 +0800
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Subject: [PATCH] src: Don't parse string as verdict in map
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In verdict map, string values are accidentally treated as verdicts.
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For example:
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table t {
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map foo {
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type ipv4_addr : verdict
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elements = {
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192.168.0.1 : bar
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}
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}
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chain output {
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type filter hook output priority mangle;
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ip daddr vmap @foo
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}
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}
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Though "bar" is not a valid verdict (should be "jump bar" or something),
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the string is taken as the element value. Then NFTA_DATA_VALUE is sent
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to the kernel instead of NFTA_DATA_VERDICT. This would be rejected by
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recent kernels. On older ones (e.g. v5.4.x) that don't validate the
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type, a warning can be seen when the rule is hit, because of the
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corrupted verdict value:
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[5120263.467627] WARNING: CPU: 12 PID: 303303 at net/netfilter/nf_tables_core.c:229 nft_do_chain+0x394/0x500 [nf_tables]
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Indeed, we don't parse verdicts during evaluation, but only chain names,
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which is of type string rather than verdict. For example, "jump $var" is
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a verdict while "$var" is a string.
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Conflict: NA
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Reference: https://git.netfilter.org/nftables/commit?id=9a20f17a7a82ce5ba47047e6c3d2fc921cc1087d
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Fixes: c64457cff967 ("src: Allow goto and jump to a variable")
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Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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---
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src/datatype.c | 12 -----------
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src/evaluate.c | 3 ++-
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tests/shell/testcases/nft-f/0031vmap_string_0 | 21 +++++++++++++++++++
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3 files changed, 23 insertions(+), 13 deletions(-)
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create mode 100755 tests/shell/testcases/nft-f/0031vmap_string_0
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diff --git a/src/datatype.c b/src/datatype.c
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index 7267d60..120da6d 100644
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--- a/src/datatype.c
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+++ b/src/datatype.c
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@@ -321,23 +321,11 @@ static void verdict_type_print(const struct expr *expr, struct output_ctx *octx)
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}
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}
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-static struct error_record *verdict_type_parse(struct parse_ctx *ctx,
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- const struct expr *sym,
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- struct expr **res)
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-{
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- *res = constant_expr_alloc(&sym->location, &string_type,
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- BYTEORDER_HOST_ENDIAN,
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- (strlen(sym->identifier) + 1) * BITS_PER_BYTE,
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- sym->identifier);
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- return NULL;
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-}
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-
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const struct datatype verdict_type = {
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.type = TYPE_VERDICT,
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.name = "verdict",
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.desc = "netfilter verdict",
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.print = verdict_type_print,
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- .parse = verdict_type_parse,
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};
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static const struct symbol_table nfproto_tbl = {
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diff --git a/src/evaluate.c b/src/evaluate.c
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index c6332a1..66ba6a4 100644
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--- a/src/evaluate.c
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+++ b/src/evaluate.c
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@@ -2426,7 +2426,8 @@ static int stmt_evaluate_verdict(struct eval_ctx *ctx, struct stmt *stmt)
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if (stmt->expr->verdict != NFT_CONTINUE)
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stmt->flags |= STMT_F_TERMINAL;
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if (stmt->expr->chain != NULL) {
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- if (expr_evaluate(ctx, &stmt->expr->chain) < 0)
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+ if (stmt_evaluate_arg(ctx, stmt, &string_type, 0, 0,
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+ &stmt->expr->chain) < 0)
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return -1;
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if (stmt->expr->chain->etype != EXPR_VALUE) {
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return expr_error(ctx->msgs, stmt->expr->chain,
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diff --git a/tests/shell/testcases/nft-f/0031vmap_string_0 b/tests/shell/testcases/nft-f/0031vmap_string_0
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new file mode 100755
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index 0000000..2af846a
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--- /dev/null
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+++ b/tests/shell/testcases/nft-f/0031vmap_string_0
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@@ -0,0 +1,21 @@
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+#!/bin/bash
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+
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+# Tests parse of corrupted verdicts
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+
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+set -e
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+
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+RULESET="
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+table ip foo {
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+ map bar {
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+ type ipv4_addr : verdict
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+ elements = {
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+ 192.168.0.1 : ber
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+ }
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+ }
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+
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+ chain ber {
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+ }
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+}"
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+
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+$NFT -f - <<< "$RULESET" && exit 1
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+exit 0
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--
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2.33.0
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Binary file not shown.
BIN
nftables-1.0.7.tar.xz
Normal file
BIN
nftables-1.0.7.tar.xz
Normal file
Binary file not shown.
@ -1,15 +1,14 @@
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Name: nftables
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Name: nftables
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Version: 1.0.5
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Version: 1.0.7
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Release: 2
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Release: 1
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Epoch: 1
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Epoch: 1
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Summary: A subsystem of the Linux kernel processing network data
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Summary: A subsystem of the Linux kernel processing network data
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License: GPLv2
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License: GPLv2
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URL: https://netfilter.org/projects/nftables/
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URL: https://netfilter.org/projects/nftables/
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Source0: http://ftp.netfilter.org/pub/nftables/nftables-%{version}.tar.bz2
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Source0: http://ftp.netfilter.org/pub/nftables/nftables-%{version}.tar.xz
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Source1: nftables.service
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Source1: nftables.service
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Source2: nftables.conf
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Source2: nftables.conf
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Patch6001: backport-src-Don-t-parse-string-as-verdict-in-map.patch
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BuildRequires: gcc flex bison libmnl-devel gmp-devel readline-devel libnftnl-devel docbook2X systemd
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BuildRequires: gcc flex bison libmnl-devel gmp-devel readline-devel libnftnl-devel docbook2X systemd
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BuildRequires: iptables-devel jansson-devel python3-devel
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BuildRequires: iptables-devel jansson-devel python3-devel
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@ -109,12 +108,18 @@ echo "%{_libdir}" > %{buildroot}/etc/ld.so.conf.d/%{name}-%{_arch}.conf
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%{python3_sitelib}/nftables/
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%{python3_sitelib}/nftables/
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%changelog
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%changelog
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* Mon Nov 06 2023 liweigang <weigangli99@gmail.com> - 1:1.0.7-1
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- Type: requirement
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- ID: NA
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- SUG: NA
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- DESC: update to version 1.0.7
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* Wed Feb 15 2023 zhanghao <zhanghao383@huawei.com> - 1:1.0.5-2
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* Wed Feb 15 2023 zhanghao <zhanghao383@huawei.com> - 1:1.0.5-2
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- Type:requirement
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- Type:requirement
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- ID:NA
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- ID:NA
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- SUG:NA
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- SUG:NA
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- DESC:fix one patch from 1.0.0 and delete useless Patches
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- DESC:fix one patch from 1.0.0 and delete useless Patches
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* Wed Feb 08 2023 zhanghao <zhanghao383@huawei.com> - 1:1.0.5-1
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* Wed Feb 08 2023 zhanghao <zhanghao383@huawei.com> - 1:1.0.5-1
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- Type:requirement
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- Type:requirement
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- ID:NA
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- ID:NA
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@ -2,4 +2,4 @@ git_url: git://git.netfilter.org/nftables
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version_control: git
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version_control: git
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src_repo: git://git.netfilter.org/nftables
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src_repo: git://git.netfilter.org/nftables
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tag_prefix: v
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tag_prefix: v
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seperator: .
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separator: .
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