Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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' # BAD_MAXACT_TYPE
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:^ 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 $FUNCTION_FORK abcd=\\1" # SAME_PROBE
98fi
99
100# %return suffix errors
101if grep -q "place (kretprobe): .*%return.*" README; then
102check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX
103check_error 'p ^vfs_read+10%return' # BAD_RETPROBE
104fi
105
106# BTF arguments errors
107if grep -q "<argname>" README; then
108check_error 'p vfs_read args=^$arg*' # BAD_VAR_ARGS
109check_error 'p vfs_read +0(^$arg*)' # BAD_VAR_ARGS
110check_error 'p vfs_read $arg* ^$arg*' # DOUBLE_ARGS
111if !grep -q 'kernel return probes support:' README; then
112check_error 'r vfs_read ^$arg*' # NOFENTRY_ARGS
113fi
114check_error 'p vfs_read+20 ^$arg*' # NOFENTRY_ARGS
115check_error 'p vfs_read ^hoge' # NO_BTFARG
116check_error 'p kfree ^$arg10' # NO_BTFARG (exceed the number of parameters)
117check_error 'r kfree ^$retval' # NO_RETVAL
118else
119check_error 'p vfs_read ^$arg*' # NOSUP_BTFARG
120fi
121
122exit 0