1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe event parser error log check 4 5[ -f kprobe_events ] || exit_unsupported # this is configurable 6 7[ -f error_log ] || exit_unsupported 8 9check_error() { # command-with-error-pos-by-^ 10 ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events' 11} 12 13if grep -q 'r\[maxactive\]' README; then 14check_error 'p^100 vfs_read' # MAXACT_NO_KPROBE 15check_error 'r^1a111 vfs_read' # BAD_MAXACT 16check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG 17fi 18 19check_error 'p ^non_exist_func' # BAD_PROBE_ADDR (enoent) 20check_error 'p ^hoge-fuga' # BAD_PROBE_ADDR (bad syntax) 21check_error 'p ^hoge+1000-1000' # BAD_PROBE_ADDR (bad syntax) 22check_error 'r ^vfs_read+10' # BAD_RETPROBE 23check_error 'p:^/bar vfs_read' # NO_GROUP_NAME 24check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG 25 26check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME 27check_error 'p:foo/^ vfs_read' # NO_EVENT_NAME 28check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG 29check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME 30 31check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE 32check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM 33 34if grep -q '$arg<N>' README; then 35check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM 36fi 37 38check_error 'p vfs_read ^$none_var' # BAD_VAR 39 40check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME 41check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR 42check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE 43 44check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE 45check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS 46check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE 47 48if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then 49check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF 50fi 51 52check_error 'p vfs_read ^&1' # BAD_FETCH_ARG 53 54 55# We've introduced this limitation with array support 56if grep -q ' <type>\\\[<array-size>\\\]' README; then 57check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS? 58check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE 59check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX 60check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM 61check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG 62fi 63 64check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE 65check_error 'p vfs_read $stack0:^string' # BAD_STRING 66check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD 67 68check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG 69check_error 'p vfs_read ^=@11' # NO_ARG_NAME 70check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME 71check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME 72check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG 73check_error 'p vfs_read arg1=^' # NO_ARG_BODY 74 75# instruction boundary check is valid on x86 (at this moment) 76case $(uname -m) in 77 x86_64|i[3456]86) 78 echo 'p vfs_read' > kprobe_events 79 if grep -q FTRACE ../kprobes/list ; then 80 check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled) 81 fi 82 ;; 83esac 84 85exit 0 86