kprobe_syntax_errors.tc (4110B)
1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe event parser error log check 4# requires: kprobe_events error_log 5 6check_error() { # command-with-error-pos-by-^ 7 ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events' 8} 9 10if grep -q 'r\[maxactive\]' README; then 11check_error 'p^100 vfs_read' # MAXACT_NO_KPROBE 12check_error 'r^1a111 vfs_read' # BAD_MAXACT 13check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG 14fi 15 16check_error 'p ^non_exist_func' # BAD_PROBE_ADDR (enoent) 17check_error 'p ^hoge-fuga' # BAD_PROBE_ADDR (bad syntax) 18check_error 'p ^hoge+1000-1000' # BAD_PROBE_ADDR (bad syntax) 19check_error 'r ^vfs_read+10' # BAD_RETPROBE 20check_error 'p:^/bar vfs_read' # NO_GROUP_NAME 21check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG 22 23check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME 24check_error 'p:foo/^ vfs_read' # NO_EVENT_NAME 25check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG 26check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME 27 28check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE 29check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM 30 31if grep -q '$arg<N>' README; then 32check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM 33fi 34 35check_error 'p vfs_read ^$none_var' # BAD_VAR 36 37check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME 38check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR 39check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE 40 41grep -q "imm-value" README && \ 42check_error 'p vfs_read arg1=\^x' # BAD_IMM 43grep -q "imm-string" README && \ 44check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE 45 46check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE 47check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS 48check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE 49 50if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then 51check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF 52fi 53 54check_error 'p vfs_read ^&1' # BAD_FETCH_ARG 55 56 57# We've introduced this limitation with array support 58if grep -q ' <type>\\\[<array-size>\\\]' README; then 59check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS? 60check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE 61check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX 62check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM 63check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG 64fi 65 66check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE 67check_error 'p vfs_read $stack0:^string' # BAD_STRING 68check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD 69 70check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG 71check_error 'p vfs_read ^=@11' # NO_ARG_NAME 72check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME 73check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME 74check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG 75check_error 'p vfs_read arg1=^' # NO_ARG_BODY 76 77# instruction boundary check is valid on x86 (at this moment) 78case $(uname -m) in 79 x86_64|i[3456]86) 80 echo 'p vfs_read' > kprobe_events 81 if grep -q FTRACE ../kprobes/list ; then 82 check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled) 83 fi 84 ;; 85esac 86 87# multiprobe errors 88if grep -q "Create/append/" README && grep -q "imm-value" README; then 89echo "p:kprobes/testevent $FUNCTION_FORK" > kprobe_events 90check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE 91 92# Explicitly use printf "%s" to not interpret \1 93printf "%s" "p:kprobes/testevent $FUNCTION_FORK abcd=\\1" > kprobe_events 94check_error "p:kprobes/testevent $FUNCTION_FORK ^bcd=\\1" # DIFF_ARG_TYPE 95check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\1:u8" # DIFF_ARG_TYPE 96check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\\"foo\"" # DIFF_ARG_TYPE 97check_error "^p:kprobes/testevent $FUNCTION_FORK abcd=\\1" # SAME_PROBE 98fi 99 100# %return suffix errors 101if grep -q "place (kretprobe): .*%return.*" README; then 102check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX 103check_error 'p ^vfs_read+10%return' # BAD_RETPROBE 104fi 105 106exit 0