From 34f87e82f38adaefb1db617a5d618ca7ab140733 Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Wed, 6 Sep 2023 13:52:19 +0200
Subject: tests/shell: skip test in rootless that hit socket buffer size limit

The socket buffer limits like /proc/sys/net/core/{rmem_max,wmem_max}
can cause tests to fail, when running rootless. That's because real-root
can override those limits, rootless cannot.

Add an environment variable NFT_TEST_HAS_SOCKET_LIMITS=*|n which is
automatically set by "run-tests.sh".

Certain tests will check for [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] and
skip the test.

The user may manually bump those limits (requires root), and set
NFT_TEST_HAS_SOCKET_LIMITS=n to get the tests to pass even as rootless.

For example, the test passes with root:

  sudo ./tests/shell/run-tests.sh -- tests/shell/testcases/sets/automerge_0

Without root, it would fail. Skip it instead:

  ./tests/shell/run-tests.sh -- tests/shell/testcases/sets/automerge_0
  ...
  I: [SKIPPED]    tests/shell/testcases/sets/automerge_0

Or bump the limit:

  $ echo 3000000 | sudo tee /proc/sys/net/core/wmem_max
  $ NFT_TEST_HAS_SOCKET_LIMITS=n ./tests/shell/run-tests.sh -- tests/shell/testcases/sets/automerge_0
  ...
  I: [OK]         tests/shell/testcases/sets/automerge_0

Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
 tests/shell/run-tests.sh                           | 32 ++++++++++++++++++++++
 tests/shell/testcases/nft-f/0011manydefines_0      | 16 +++++++++++
 tests/shell/testcases/sets/0011add_many_elements_0 | 15 ++++++++++
 .../testcases/sets/0012add_delete_many_elements_0  | 14 ++++++++++
 .../testcases/sets/0013add_delete_many_elements_0  | 14 ++++++++++
 .../sets/0030add_many_elements_interval_0          | 14 ++++++++++
 .../testcases/sets/0068interval_stack_overflow_0   | 18 +++++++++++-
 tests/shell/testcases/sets/automerge_0             | 24 +++++++++++++---
 tests/shell/testcases/transactions/0049huge_0      | 16 +++++++++++
 tests/shell/testcases/transactions/30s-stress      |  9 ++++++
 10 files changed, 167 insertions(+), 5 deletions(-)

diff --git a/tests/shell/run-tests.sh b/tests/shell/run-tests.sh
index 97c82991..423c5465 100755
--- a/tests/shell/run-tests.sh
+++ b/tests/shell/run-tests.sh
@@ -28,6 +28,17 @@ msg_info() {
 	_msg I "$@"
 }
 
+bool_n() {
+	case "$1" in
+		n|N|no|No|NO|0|false|False|FALSE)
+			printf n
+			;;
+		*)
+			printf y
+			;;
+	esac
+}
+
 bool_y() {
 	case "$1" in
 		y|Y|yes|Yes|YES|1|true|True|TRUE)
@@ -78,6 +89,12 @@ usage() {
 	echo "                 e.g. due to limited /proc/sys/net/core/{wmem_max,rmem_max}."
 	echo "                 Checks that cannot pass in such environment should check for"
 	echo "                 [ \"\$NFT_TEST_HAS_REALROOT\" != y ] and skip gracefully."
+	echo " NFT_TEST_HAS_SOCKET_LIMITS=*|n : some tests will fail if /proc/sys/net/core/{wmem_max,rmem_max} is"
+	echo "                 too small. When running as real root, then test can override those limits. However,"
+	echo "                 with rootless the test would fail. Tests will check for [ "\$NFT_TEST_HAS_SOCKET_LIMITS" = y ]"
+	echo "                 and skip. You may set NFT_TEST_HAS_SOCKET_LIMITS=n if you ensure those limits are"
+	echo "                 suitable to run the test rootless. Otherwise will be autodetected."
+	echo "                 Set /proc/sys/net/core/{wmem_max,rmem_max} to at least 2MB to get them to pass automatically."
 	echo " NFT_TEST_UNSHARE_CMD=cmd : when set, this is the command line for an unshare"
 	echo "                 command, which is used to sandbox each test invocation. By"
 	echo "                 setting it to empty, no unsharing is done."
@@ -202,6 +219,20 @@ else
 fi
 export NFT_TEST_HAS_REALROOT
 
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = "" ] ; then
+	if [ "$NFT_TEST_HAS_REALROOT" = y ] ; then
+		NFT_TEST_HAS_SOCKET_LIMITS=n
+	elif [ "$(cat /proc/sys/net/core/wmem_max 2>/dev/null)" -ge $((2000*1024)) ] 2>/dev/null && \
+	     [ "$(cat /proc/sys/net/core/rmem_max 2>/dev/null)" -ge $((2000*1024)) ] 2>/dev/null ; then
+		NFT_TEST_HAS_SOCKET_LIMITS=n
+	else
+		NFT_TEST_HAS_SOCKET_LIMITS=y
+	fi
+else
+	NFT_TEST_HAS_SOCKET_LIMITS="$(bool_n "$NFT_TEST_HAS_SOCKET_LIMITS")"
+fi
+export NFT_TEST_HAS_SOCKET_LIMITS
+
 detect_unshare() {
 	if ! $1 true &>/dev/null ; then
 		return 1
@@ -316,6 +347,7 @@ msg_info "conf: DUMPGEN=$(printf '%q' "$DUMPGEN")"
 msg_info "conf: VALGRIND=$(printf '%q' "$VALGRIND")"
 msg_info "conf: KMEMLEAK=$(printf '%q' "$KMEMLEAK")"
 msg_info "conf: NFT_TEST_HAS_REALROOT=$(printf '%q' "$NFT_TEST_HAS_REALROOT")"
+msg_info "conf: NFT_TEST_HAS_SOCKET_LIMITS=$(printf '%q' "$NFT_TEST_HAS_SOCKET_LIMITS")"
 msg_info "conf: NFT_TEST_UNSHARE_CMD=$(printf '%q' "$NFT_TEST_UNSHARE_CMD")"
 msg_info "conf: NFT_TEST_HAS_UNSHARED=$(printf '%q' "$NFT_TEST_HAS_UNSHARED")"
 msg_info "conf: NFT_TEST_HAS_UNSHARED_MOUNT=$(printf '%q' "$NFT_TEST_HAS_UNSHARED_MOUNT")"
diff --git a/tests/shell/testcases/nft-f/0011manydefines_0 b/tests/shell/testcases/nft-f/0011manydefines_0
index 84664f46..aac06706 100755
--- a/tests/shell/testcases/nft-f/0011manydefines_0
+++ b/tests/shell/testcases/nft-f/0011manydefines_0
@@ -4,6 +4,15 @@
 
 HOWMANY=20000
 
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=2000
+fi
+
+
 tmpfile=$(mktemp)
 if [ ! -w $tmpfile ] ; then
 	echo "Failed to create tmp file" >&2
@@ -35,3 +44,10 @@ table t {
 
 set -e
 $NFT -f $tmpfile
+
+if [ "$HOWMANY" != 20000 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/0011add_many_elements_0 b/tests/shell/testcases/sets/0011add_many_elements_0
index ba23f90f..c37b2f0d 100755
--- a/tests/shell/testcases/sets/0011add_many_elements_0
+++ b/tests/shell/testcases/sets/0011add_many_elements_0
@@ -3,6 +3,14 @@
 # test adding many sets elements
 
 HOWMANY=255
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=30
+fi
+
 
 tmpfile=$(mktemp)
 if [ ! -w $tmpfile ] ; then
@@ -30,3 +38,10 @@ add element x y $(generate)" > $tmpfile
 
 set -e
 $NFT -f $tmpfile
+
+if [ "$HOWMANY" != 255 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/0012add_delete_many_elements_0 b/tests/shell/testcases/sets/0012add_delete_many_elements_0
index 7e7beebd..64451604 100755
--- a/tests/shell/testcases/sets/0012add_delete_many_elements_0
+++ b/tests/shell/testcases/sets/0012add_delete_many_elements_0
@@ -3,6 +3,13 @@
 # test adding and deleting many sets elements
 
 HOWMANY=255
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=30
+fi
 
 tmpfile=$(mktemp)
 if [ ! -w $tmpfile ] ; then
@@ -31,3 +38,10 @@ delete element x y $(generate)" > $tmpfile
 
 set -e
 $NFT -f $tmpfile
+
+if [ "$HOWMANY" != 255 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/0013add_delete_many_elements_0 b/tests/shell/testcases/sets/0013add_delete_many_elements_0
index 5774317b..c0925dd5 100755
--- a/tests/shell/testcases/sets/0013add_delete_many_elements_0
+++ b/tests/shell/testcases/sets/0013add_delete_many_elements_0
@@ -3,6 +3,13 @@
 # test adding and deleting many sets elements in two nft -f runs.
 
 HOWMANY=255
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=30
+fi
 
 tmpfile=$(mktemp)
 if [ ! -w $tmpfile ] ; then
@@ -32,3 +39,10 @@ add element x y $(generate)" > $tmpfile
 $NFT -f $tmpfile
 echo "delete element x y $(generate)" > $tmpfile
 $NFT -f $tmpfile
+
+if [ "$HOWMANY" != 255 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/0030add_many_elements_interval_0 b/tests/shell/testcases/sets/0030add_many_elements_interval_0
index 059ade9a..32a705bf 100755
--- a/tests/shell/testcases/sets/0030add_many_elements_interval_0
+++ b/tests/shell/testcases/sets/0030add_many_elements_interval_0
@@ -1,6 +1,13 @@
 #!/bin/bash
 
 HOWMANY=255
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=30
+fi
 
 tmpfile=$(mktemp)
 if [ ! -w $tmpfile ] ; then
@@ -28,3 +35,10 @@ add element x y $(generate)" > $tmpfile
 
 set -e
 $NFT -f $tmpfile
+
+if [ "$HOWMANY" != 255 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/0068interval_stack_overflow_0 b/tests/shell/testcases/sets/0068interval_stack_overflow_0
index 2cbc9868..e61010c7 100755
--- a/tests/shell/testcases/sets/0068interval_stack_overflow_0
+++ b/tests/shell/testcases/sets/0068interval_stack_overflow_0
@@ -6,9 +6,18 @@ ruleset_file=$(mktemp)
 
 trap 'rm -f "$ruleset_file"' EXIT
 
+HOWMANY=255
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=30
+fi
+
 {
 	echo 'define big_set = {'
-	for ((i = 1; i < 255; i++)); do
+	for ((i = 1; i < $HOWMANY; i++)); do
 		for ((j = 1; j < 255; j++)); do
 			echo "10.0.$i.$j,"
 		done
@@ -27,3 +36,10 @@ table inet test68_table {
 EOF
 
 ( ulimit -s 400 && $NFT -f "$ruleset_file" )
+
+if [ "$HOWMANY" != 255 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/sets/automerge_0 b/tests/shell/testcases/sets/automerge_0
index 7530b3db..fc34f886 100755
--- a/tests/shell/testcases/sets/automerge_0
+++ b/tests/shell/testcases/sets/automerge_0
@@ -10,14 +10,23 @@ RULESET="table inet x {
 	}
 }"
 
+HOWMANY=65535
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	HOWMANY=5000
+fi
+
 $NFT -f - <<< $RULESET
 
 tmpfile=$(mktemp)
 echo -n "add element inet x y { " > $tmpfile
-for ((i=0;i<65535;i+=2))
+for ((i=0;i<$HOWMANY;i+=2))
 do
 	echo -n "$i, " >> $tmpfile
-	if [ $i -eq 65534 ]
+	if [ $i -eq $((HOWMANY-1)) ]
 	then
 		echo -n "$i" >> $tmpfile
 	fi
@@ -27,7 +36,7 @@ echo "}" >> $tmpfile
 $NFT -f $tmpfile
 
 tmpfile2=$(mktemp)
-for ((i=1;i<65535;i+=2))
+for ((i=1;i<$HOWMANY;i+=2))
 do
 	echo "$i" >> $tmpfile2
 done
@@ -48,7 +57,7 @@ done
 
 for ((i=0;i<10;i++))
 do
-	from=$(($RANDOM%65535))
+	from=$(($RANDOM%$HOWMANY))
 	to=$(($from+100))
 	$NFT add element inet x y { $from-$to }
 	if [ $? -ne 0 ]
@@ -111,3 +120,10 @@ done
 rm -f $tmpfile
 rm -f $tmpfile2
 rm -f $tmpfile3
+
+if [ "$HOWMANY" != 65535 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/wmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/transactions/0049huge_0 b/tests/shell/testcases/transactions/0049huge_0
index 684d27a1..1a3a75c7 100755
--- a/tests/shell/testcases/transactions/0049huge_0
+++ b/tests/shell/testcases/transactions/0049huge_0
@@ -7,6 +7,15 @@ $NFT add table inet test
 $NFT add chain inet test c
 
 RULE_COUNT=3000
+
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/rmem_max may be unsuitable for
+	# the test.
+	#
+	# Run only a subset of the test and mark as skipped at the end.
+	RULE_COUNT=500
+fi
+
 RULESET=$(
 for ((i = 0; i < ${RULE_COUNT}; i++)); do
 	echo "add rule inet test c accept comment rule$i"
@@ -39,3 +48,10 @@ RULESET='{"nftables": [{"metainfo": {"json_schema_version": 1}}, {"add": {"table
 {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_OUTPUT", "index": 0, "expr": [{"match": {"left": {"payload": {"protocol": "ip6", "field": "daddr"}}, "op": "==", "right": {"set": [{"prefix": {"addr": "::0.0.0.0", "len": 96}}, {"prefix": {"addr": "::ffff:0.0.0.0", "len": 96}}, {"prefix": {"addr": "2002:0000::", "len": 24}}, {"prefix": {"addr": "2002:0a00::", "len": 24}}, {"prefix": {"addr": "2002:7f00::", "len": 24}}, {"prefix": {"addr": "2002:ac10::", "len": 28}}, {"prefix": {"addr": "2002:c0a8::", "len": 32}}, {"prefix": {"addr": "2002:a9fe::", "len": 32}}, {"prefix": {"addr": "2002:e000::", "len": 19}}]}}}, {"reject": {"type": "icmpv6", "expr": "addr-unreachable"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD", "index": 2, "expr": [{"match": {"left": {"payload": {"protocol": "ip6", "field": "daddr"}}, "op": "==", "right": {"set": [{"prefix": {"addr": "::0.0.0.0", "len": 96}}, {"prefix": {"addr": "::ffff:0.0.0.0", "len": 96}}, {"prefix": {"addr": "2002:0000::", "len": 24}}, {"prefix": {"addr": "2002:0a00::", "len": 24}}, {"prefix": {"addr": "2002:7f00::", "len": 24}}, {"prefix": {"addr": "2002:ac10::", "len": 28}}, {"prefix": {"addr": "2002:c0a8::", "len": 32}}, {"prefix": {"addr": "2002:a9fe::", "len": 32}}, {"prefix": {"addr": "2002:e000::", "len": 19}}]}}}, {"reject": {"type": "icmpv6", "expr": "addr-unreachable"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_post"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public_allow", "expr": [{"match": {"left": {"payload": {"protocol": "tcp", "field": "dport"}}, "op": "==", "right": 22}}, {"match": {"left": {"ct": {"key": "state"}}, "op": "in", "right": {"set": ["new", "untracked"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public_allow", "expr": [{"match": {"left": {"payload": {"protocol": "ip6", "field": "daddr"}}, "op": "==", "right": {"prefix": {"addr": "fe80::", "len": 64}}}}, {"match": {"left": {"payload": {"protocol": "udp", "field": "dport"}}, "op": "==", "right": 546}}, {"match": {"left": {"ct": {"key": "state"}}, "op": "in", "right": {"set": ["new", "untracked"]}}}, {"accept": null}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PREROUTING_ZONES", "expr": [{"goto": {"target": "raw_PRE_public"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_log"}}}, 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{"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"jump": {"target": "filter_FWDI_trusted_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"jump": {"target": "filter_FWDI_trusted_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"jump": {"target": "filter_FWDI_trusted_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"jump": {"target": "filter_FWDI_trusted_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"jump": {"target": "filter_FWDI_trusted_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_trusted", "expr": [{"accept": null}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_IN_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy2"}}, {"goto": {"target": "filter_FWDI_trusted"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_trusted_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"jump": {"target": "filter_FWDO_trusted_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"jump": {"target": "filter_FWDO_trusted_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"jump": {"target": "filter_FWDO_trusted_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"jump": {"target": "filter_FWDO_trusted_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"jump": {"target": "filter_FWDO_trusted_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_trusted", "expr": [{"accept": null}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_OUT_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "perm_dummy2"}}, {"goto": {"target": "filter_FWDO_trusted"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_work_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_work", "expr": [{"jump": {"target": "raw_PRE_work_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_work", "expr": [{"jump": {"target": "raw_PRE_work_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_work", "expr": [{"jump": {"target": "raw_PRE_work_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_work", "expr": [{"jump": {"target": "raw_PRE_work_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_work", "expr": [{"jump": {"target": "raw_PRE_work_post"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_work_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "expr": [{"jump": {"target": "filter_IN_work_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "expr": [{"jump": {"target": "filter_IN_work_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "expr": [{"jump": {"target": "filter_IN_work_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "expr": [{"jump": {"target": "filter_IN_work_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "expr": [{"jump": {"target": "filter_IN_work_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work_allow", "expr": [{"match": {"left": {"payload": {"protocol": "tcp", "field": "dport"}}, "op": "==", "right": 22}}, {"match": {"left": {"ct": {"key": "state"}}, "op": "in", "right": {"set": ["new", "untracked"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work_allow", "expr": [{"match": {"left": {"payload": {"protocol": "ip6", "field": "daddr"}}, "op": "==", "right": {"prefix": {"addr": "fe80::", "len": 64}}}}, {"match": {"left": {"payload": {"protocol": "udp", "field": "dport"}}, "op": "==", "right": 546}}, {"match": {"left": {"ct": {"key": "state"}}, "op": "in", "right": {"set": ["new", "untracked"]}}}, {"accept": null}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "raw_PRE_work"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_work_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_work", "expr": [{"jump": {"target": "mangle_PRE_work_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_work", "expr": [{"jump": {"target": "mangle_PRE_work_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_work", "expr": [{"jump": {"target": "mangle_PRE_work_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_work", "expr": [{"jump": {"target": "mangle_PRE_work_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_work", "expr": [{"jump": {"target": "mangle_PRE_work_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "mangle_PRE_work"}}]}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work_pre"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work_log"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work_deny"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work_allow"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_work_post"}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_pre"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_log"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_deny"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_allow"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_post"}}]}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work_pre"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work_log"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work_deny"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work_allow"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_work_post"}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_pre"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_log"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_deny"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_allow"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_work", "expr": [{"jump": {"target": "nat_PRE_work_post"}}]}}}, {"insert": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "nat_PRE_work"}}]}}}, {"insert": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "nat_PRE_work"}}]}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work_pre"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work_log"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work_deny"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work_allow"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_work_post"}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_pre"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_log"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_deny"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_allow"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_post"}}]}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work_pre"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work_log"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work_deny"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work_allow"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_work_post"}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_pre"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_log"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_deny"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_allow"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_work", "expr": [{"jump": {"target": "nat_POST_work_post"}}]}}}, {"insert": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POSTROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "nat_POST_work"}}]}}}, {"insert": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POSTROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "nat_POST_work"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_INPUT_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "filter_IN_work"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_work_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "expr": [{"jump": {"target": "filter_FWDI_work_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "expr": [{"jump": {"target": "filter_FWDI_work_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "expr": [{"jump": {"target": "filter_FWDI_work_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "expr": [{"jump": {"target": "filter_FWDI_work_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "expr": [{"jump": {"target": "filter_FWDI_work_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_IN_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "filter_FWDI_work"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_work_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_work", "expr": [{"jump": {"target": "filter_FWDO_work_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_work", "expr": [{"jump": {"target": "filter_FWDO_work_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_work", "expr": [{"jump": {"target": "filter_FWDO_work_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_work", "expr": [{"jump": {"target": "filter_FWDO_work_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_work", "expr": [{"jump": {"target": "filter_FWDO_work_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_OUT_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "perm_dummy"}}, {"goto": {"target": "filter_FWDO_work"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_work", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_work", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}]}'
 
 test -z "$($NFT -j -e -a -f - <<< "$RULESET" |sed 's/\({"add":\|{"insert":\)/\n\1/g' |grep '\({"add":\|{"insert":\)' | grep -v '"handle"')"
+
+if [ "$RULE_COUNT" != 3000 ] ; then
+	echo "NFT_TEST_HAS_SOCKET_LIMITS indicates that the socket limit for"
+	echo "/proc/sys/net/core/rmem_max is too small for this test. Mark as SKIPPED"
+	echo "You may bump the limit and rerun with \`NFT_TEST_HAS_SOCKET_LIMITS=n\`."
+	exit 77
+fi
diff --git a/tests/shell/testcases/transactions/30s-stress b/tests/shell/testcases/transactions/30s-stress
index 4d3317e2..757e7639 100755
--- a/tests/shell/testcases/transactions/30s-stress
+++ b/tests/shell/testcases/transactions/30s-stress
@@ -16,6 +16,15 @@ if [ x = x"$NFT" ] ; then
 	NFT=nft
 fi
 
+if [ "$NFT_TEST_HAS_SOCKET_LIMITS" = y ] ; then
+	# The socket limit /proc/sys/net/core/wmem_max may be unsuitable for
+	# the test.
+	#
+	# Skip it. You may ensure that the limits are suitable and rerun
+	# with NFT_TEST_HAS_SOCKET_LIMITS=n.
+	exit 77
+fi
+
 testns=testns-$(mktemp -u "XXXXXXXX")
 tmp=""
 
-- 
cgit v1.2.3