You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.0 KiB
84 lines
2.0 KiB
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
# Copyright (c) 2019 FUJITSU LIMITED. All rights reserved.
|
|
# Copyright (c) 2019 Petr Vorel <pvorel@suse.cz>
|
|
# Author: Yang Xu<xuyang2018.jy@cn.fujitsu.com>
|
|
#
|
|
# Test for these regressions causing buffer overflow when writing into
|
|
# /proc/sys/fs/file-max:
|
|
# 7f2923c4f73f ("sysctl: handle overflow in proc_get_long")
|
|
# 32a5ad9c2285 ("sysctl: handle overflow for file-max")
|
|
#
|
|
# This bug has been fixed in 9002b21465fa ("kernel/sysctl.c: fix
|
|
# out-of-bounds access when setting file-max")
|
|
#
|
|
# We test in sysctl02.sh setting 2^64, 2^64-1, 2^63 and 0.
|
|
|
|
TST_TESTFUNC=do_test
|
|
TST_SETUP=setup
|
|
TST_CLEANUP=cleanup
|
|
TST_CNT=4
|
|
TST_NEEDS_ROOT=1
|
|
TST_NEEDS_CMDS="sysctl"
|
|
sys_name="fs.file-max"
|
|
sys_file="/proc/sys/fs/file-max"
|
|
syms_file="/proc/kallsyms"
|
|
|
|
. tst_test.sh
|
|
|
|
setup()
|
|
{
|
|
[ ! -f "$sys_file" ] && tst_brk TCONF "$sys_file not enabled"
|
|
orig_value=$(cat "$sys_file")
|
|
}
|
|
|
|
do_test()
|
|
{
|
|
case $1 in
|
|
1) sysctl_test_overflow 18446744073709551616 ;;
|
|
2) sysctl_test_overflow 18446744073709551615 ;;
|
|
3) sysctl_test_overflow 9223372036854775808 ;;
|
|
4) sysctl_test_zero ;;
|
|
esac
|
|
}
|
|
|
|
sysctl_test_overflow()
|
|
{
|
|
local test_value="$1"
|
|
local old_value="$(cat $sys_file)"
|
|
|
|
tst_res TINFO "trying to set $sys_name=$test_value"
|
|
sysctl -w -q $sys_name=$test_value 2>/dev/null
|
|
local new_value="$(cat $sys_file)"
|
|
|
|
if [ "$new_value" = "$old_value" ]; then
|
|
tst_res TPASS "$sys_file keeps old value ($old_value)"
|
|
else
|
|
tst_res TFAIL "$sys_file overflows and is set to $new_value"
|
|
fi
|
|
cleanup
|
|
}
|
|
|
|
sysctl_test_zero()
|
|
{
|
|
[ ! -f "$syms_file" ] && tst_brk TCONF "$syms_file not enabled"
|
|
ROD sysctl -w -q $sys_name=0
|
|
|
|
if grep -q kasan_report $syms_file; then
|
|
if dmesg | grep -q "KASAN: global-out-of-bounds in __do_proc_doulongvec_minmax"; then
|
|
tst_res TFAIL "$sys_file is set 0 and trigger a KASAN error"
|
|
else
|
|
tst_res TPASS "$sys_file is set 0 and doesn't trigger a KASAN error"
|
|
fi
|
|
else
|
|
tst_res TCONF "kernel doesn't support KASAN"
|
|
fi
|
|
}
|
|
|
|
cleanup()
|
|
{
|
|
[ -n "$orig_value" ] && sysctl -w -q $sys_name=$orig_value
|
|
}
|
|
|
|
tst_run
|