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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/tools/testing/selftests/kmod/kmod.sh
....@@ -28,7 +28,7 @@
2828 # override by exporting to your environment prior running this script.
2929 # For instance this script assumes you do not have xfs loaded upon boot.
3030 # If this is false, export DEFAULT_KMOD_FS="ext4" prior to running this
31
-# script if the filesyste module you don't have loaded upon bootup
31
+# script if the filesystem module you don't have loaded upon bootup
3232 # is ext4 instead. Refer to allow_user_defaults() for a list of user
3333 # override variables possible.
3434 #
....@@ -61,6 +61,10 @@
6161 ALL_TESTS="$ALL_TESTS 0007:5:1"
6262 ALL_TESTS="$ALL_TESTS 0008:150:1"
6363 ALL_TESTS="$ALL_TESTS 0009:150:1"
64
+ALL_TESTS="$ALL_TESTS 0010:1:1"
65
+ALL_TESTS="$ALL_TESTS 0011:1:1"
66
+ALL_TESTS="$ALL_TESTS 0012:1:1"
67
+ALL_TESTS="$ALL_TESTS 0013:1:1"
6468 
6569 # Kselftest framework requirement - SKIP code is 4.
6670 ksft_skip=4
....@@ -126,7 +130,7 @@
126130 	if [[ $KMOD_VERSION  -le 19 ]]; then
127131 		echo "$0: You need at least kmod 20" >&2
128132 		echo "kmod <= 19 is buggy, for details see:" >&2
129
-		echo "http://git.kernel.org/cgit/utils/kernel/kmod/kmod.git/commit/libkmod/libkmod-module.c?id=fd44a98ae2eb5eb32161088954ab21e58e19dfc4" >&2
133
+		echo "https://git.kernel.org/cgit/utils/kernel/kmod/kmod.git/commit/libkmod/libkmod-module.c?id=fd44a98ae2eb5eb32161088954ab21e58e19dfc4" >&2
130134 		exit $ksft_skip
131135 	fi
132136 
....@@ -149,6 +153,7 @@
149153 
150154 test_finish()
151155 {
156
+	echo "$MODPROBE" > /proc/sys/kernel/modprobe
152157 	echo "Test completed"
153158 }
154159 
....@@ -263,7 +268,7 @@
263268 config_reset()
264269 {
265270 	if ! echo -n "1" >"$DIR"/reset; then
266
-		echo "$0: reset shuld have worked" >&2
271
+		echo "$0: reset should have worked" >&2
267272 		exit 1
268273 	fi
269274 }
....@@ -338,7 +343,7 @@
338343 
339344 	kmod_defaults_driver
340345 	config_num_threads 1
341
-	printf '\000' >"$DIR"/config_test_driver
346
+	printf $NAME >"$DIR"/config_test_driver
342347 	config_trigger ${FUNCNAME[0]}
343348 	config_expect_result ${FUNCNAME[0]} MODULE_NOT_FOUND
344349 }
....@@ -349,7 +354,7 @@
349354 
350355 	kmod_defaults_fs
351356 	config_num_threads 1
352
-	printf '\000' >"$DIR"/config_test_fs
357
+	printf $NAME >"$DIR"/config_test_fs
353358 	config_trigger ${FUNCNAME[0]}
354359 	config_expect_result ${FUNCNAME[0]} -EINVAL
355360 }
....@@ -443,6 +448,62 @@
443448 	config_expect_result ${FUNCNAME[0]} SUCCESS
444449 }
445450 
451
+kmod_test_0010()
452
+{
453
+	kmod_defaults_driver
454
+	config_num_threads 1
455
+	echo "/KMOD_TEST_NONEXISTENT" > /proc/sys/kernel/modprobe
456
+	config_trigger ${FUNCNAME[0]}
457
+	config_expect_result ${FUNCNAME[0]} -ENOENT
458
+	echo "$MODPROBE" > /proc/sys/kernel/modprobe
459
+}
460
+
461
+kmod_test_0011()
462
+{
463
+	kmod_defaults_driver
464
+	config_num_threads 1
465
+	# This causes the kernel to not even try executing modprobe.  The error
466
+	# code is still -ENOENT like when modprobe doesn't exist, so we can't
467
+	# easily test for the exact difference.  But this still is a useful test
468
+	# since there was a bug where request_module() returned 0 in this case.
469
+	echo > /proc/sys/kernel/modprobe
470
+	config_trigger ${FUNCNAME[0]}
471
+	config_expect_result ${FUNCNAME[0]} -ENOENT
472
+	echo "$MODPROBE" > /proc/sys/kernel/modprobe
473
+}
474
+
475
+kmod_check_visibility()
476
+{
477
+	local name="$1"
478
+	local cmd="$2"
479
+
480
+	modprobe $DEFAULT_KMOD_DRIVER
481
+
482
+	local priv=$(eval $cmd)
483
+	local unpriv=$(capsh --drop=CAP_SYSLOG -- -c "$cmd")
484
+
485
+	if [ "$priv" = "$unpriv" ] || \
486
+	   [ "${priv:0:3}" = "0x0" ] || \
487
+	   [ "${unpriv:0:3}" != "0x0" ] ; then
488
+		echo "${FUNCNAME[0]}: FAIL, $name visible to unpriv: '$priv' vs '$unpriv'" >&2
489
+		exit 1
490
+	else
491
+		echo "${FUNCNAME[0]}: OK!"
492
+	fi
493
+}
494
+
495
+kmod_test_0012()
496
+{
497
+	kmod_check_visibility /proc/modules \
498
+		"grep '^${DEFAULT_KMOD_DRIVER}\b' /proc/modules | awk '{print \$NF}'"
499
+}
500
+
501
+kmod_test_0013()
502
+{
503
+	kmod_check_visibility '/sys/module/*/sections/*' \
504
+		"cat /sys/module/${DEFAULT_KMOD_DRIVER}/sections/.*text | head -n1"
505
+}
506
+
446507 list_tests()
447508 {
448509 	echo "Test ID list:"
....@@ -460,6 +521,10 @@
460521 	echo "0007 x $(get_test_count 0007) - multithreaded tests with default setup test request_module() and get_fs_type()"
461522 	echo "0008 x $(get_test_count 0008) - multithreaded - push kmod_concurrent over max_modprobes for request_module()"
462523 	echo "0009 x $(get_test_count 0009) - multithreaded - push kmod_concurrent over max_modprobes for get_fs_type()"
524
+	echo "0010 x $(get_test_count 0010) - test nonexistent modprobe path"
525
+	echo "0011 x $(get_test_count 0011) - test completely disabling module autoloading"
526
+	echo "0012 x $(get_test_count 0012) - test /proc/modules address visibility under CAP_SYSLOG"
527
+	echo "0013 x $(get_test_count 0013) - test /sys/module/*/sections/* visibility under CAP_SYSLOG"
463528 }
464529 
465530 usage()
....@@ -488,7 +553,7 @@
488553 	echo Example uses:
489554 	echo
490555 	echo "${TEST_NAME}.sh		-- executes all tests"
491
-	echo "${TEST_NAME}.sh -t 0008	-- Executes test ID 0008 number of times is recomended"
556
+	echo "${TEST_NAME}.sh -t 0008	-- Executes test ID 0008 number of times is recommended"
492557 	echo "${TEST_NAME}.sh -w 0008	-- Watch test ID 0008 run until an error occurs"
493558 	echo "${TEST_NAME}.sh -s 0008	-- Run test ID 0008 once"
494559 	echo "${TEST_NAME}.sh -c 0008 3	-- Run test ID 0008 three times"
....@@ -616,6 +681,7 @@
616681 allow_user_defaults
617682 load_req_mod
618683 
684
+MODPROBE=$(</proc/sys/kernel/modprobe)
619685 trap "test_finish" EXIT
620686 
621687 parse_args $@