1#! /bin/sh 2 3########################################################################### 4## ## 5## Copyright (c) 2015, Red Hat Inc. ## 6## ## 7## This program is free software: you can redistribute it and/or modify ## 8## it under the terms of the GNU General Public License as published by ## 9## the Free Software Foundation, either version 3 of the License, or ## 10## (at your option) any later version. ## 11## ## 12## This program is distributed in the hope that it will be useful, ## 13## but WITHOUT ANY WARRANTY; without even the implied warranty of ## 14## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## 15## GNU General Public License for more details. ## 16## ## 17## You should have received a copy of the GNU General Public License ## 18## along with this program. If not, see <http://www.gnu.org/licenses/>. ## 19## ## 20## Author: Li Wang <liwang@redhat.com> ## 21## ## 22########################################################################### 23## ## 24## Summary: panic while using userstacktrace ## 25## ## 26## BUG: unable to handle kernel paging request at 00000000417683c0 ## 27## IP: [<ffffffff8105c834>] update_curr+0x124/0x1e0 ## 28## PGD 41a796067 PUD 0 ## 29## Thread overran stack, or stack corrupted ## 30## Oops: 0000 [#1] SMP ## 31## last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map ## 32## ## 33## The bug was fixed by: ## 34## 1dbd195 (tracing: Fix preempt count leak) ## 35## ## 36########################################################################### 37 38export TCID="ftrace_regression01" 39export TST_TOTAL=1 40 41. ftrace_lib.sh 42 43LOOP=10 44 45TSTACK_TRACE_PATH="/proc/sys/kernel/stack_tracer_enabled" 46EXC_PAGE_FAULT_ENABLE="$TRACING_PATH/events/exceptions/page_fault_kernel/enable" 47MM_PAGE_FAULT_ENABLE="$TRACING_PATH/events/kmem/mm_kernel_pagefault/enable" 48 49ftrace_userstacktrace_test() 50{ 51 if [ ! -e "$TSTACK_TRACE_PATH" ]; then 52 tst_brkm TCONF "Stack Tracer is not cofigured in This kernel" 53 fi 54 55 for i in $(seq $LOOP); do 56 echo 1 > $TSTACK_TRACE_PATH 57 echo userstacktrace > $TRACING_PATH/trace_options 58 grep -q "^userstacktrace" $TRACING_PATH/trace_options 59 if [ $? -ne 0 ]; then 60 tst_brkm TBROK "Failed to set userstacktrace" 61 fi 62 63 if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then 64 exc_page_fault_enable=`cat $EXC_PAGE_FAULT_ENABLE` 65 echo 1 > $EXC_PAGE_FAULT_ENABLE 66 else 67 mm_page_fault_enable=`cat $MM_PAGE_FAULT_ENABLE` 68 echo 1 > $MM_PAGE_FAULT_ENABLE 69 fi 70 done 71 72 if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then 73 echo "$exc_page_fault_enable" > $EXC_PAGE_FAULT_ENABLE 74 else 75 echo "$mm_page_fault_enable" > $MM_PAGE_FAULT_ENABLE 76 fi 77 78 tst_resm TPASS "Finished running the test" 79} 80 81ftrace_userstacktrace_test 82 83tst_exit 84