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From cc6c59e683c503b461b4a80526f4bc9cbb0660bf Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Fri, 5 Nov 2021 16:06:45 +0100
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Subject: [PATCH] tests: cover baecd1cf2685 ("segtree: Fix segfault when
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restoring a huge interval set")
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1908127
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Upstream Status: nftables commit d8ccad2a2b73c
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commit d8ccad2a2b73c4189934eb5fd0e3d096699b5043
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Author: Štěpán Němec <snemec@redhat.com>
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Date: Wed Oct 20 14:42:20 2021 +0200
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tests: cover baecd1cf2685 ("segtree: Fix segfault when restoring a huge interval set")
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Test inspired by [1] with both the set and stack size reduced by the
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same power of 2, to preserve the (pre-baecd1cf2685) segfault on one
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hand, and make the test successfully complete (post-baecd1cf2685) in a
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few seconds even on weaker hardware on the other.
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(The reason I stopped at 128kB stack size is that with 64kB I was
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getting segfaults even with baecd1cf2685 applied.)
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[1] https://bugzilla.redhat.com/show_bug.cgi?id=1908127
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Signed-off-by: Štěpán Němec <snemec@redhat.com>
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Helped-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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---
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.../sets/0068interval_stack_overflow_0 | 29 +++++++++++++++++++
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1 file changed, 29 insertions(+)
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create mode 100755 tests/shell/testcases/sets/0068interval_stack_overflow_0
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diff --git a/tests/shell/testcases/sets/0068interval_stack_overflow_0 b/tests/shell/testcases/sets/0068interval_stack_overflow_0
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new file mode 100755
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index 0000000..134282d
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--- /dev/null
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+++ b/tests/shell/testcases/sets/0068interval_stack_overflow_0
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@@ -0,0 +1,29 @@
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+#!/bin/bash
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+
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+set -e
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+
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+ruleset_file=$(mktemp)
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+
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+trap 'rm -f "$ruleset_file"' EXIT
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+
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+{
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+ echo 'define big_set = {'
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+ for ((i = 1; i < 255; i++)); do
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+ for ((j = 1; j < 80; j++)); do
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+ echo "10.0.$i.$j,"
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+ done
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+ done
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+ echo '10.1.0.0/24 }'
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+} >"$ruleset_file"
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+
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+cat >>"$ruleset_file" <<\EOF
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+table inet test68_table {
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+ set test68_set {
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+ type ipv4_addr
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+ flags interval
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+ elements = { $big_set }
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+ }
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+}
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+EOF
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+
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+( ulimit -s 128 && "$NFT" -f "$ruleset_file" )
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--
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2.31.1
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