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
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 ^$none_var' # BAD_VAR
39
40check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME
41check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR
42check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE
43
44grep -q "imm-value" README && \
45check_error 'p vfs_read arg1=\^x' # BAD_IMM
46grep -q "imm-string" README && \
47check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE
48
49check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE
50check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS
51check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE
52
53if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
54check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF
55fi
56
57check_error 'p vfs_read ^&1' # BAD_FETCH_ARG
58
59
60# We've introduced this limitation with array support
61if grep -q ' <type>\\\[<array-size>\\\]' README; then
62check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS?
63check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE
64check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX
65check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM
66check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG
67fi
68
69check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE
70check_error 'p vfs_read $stack0:^string' # BAD_STRING
71check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD
72
73check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG
74check_error 'p vfs_read ^=@11' # NO_ARG_NAME
75check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME
76check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME
77check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG
78check_error 'p vfs_read arg1=^' # NO_ARG_BODY
79
80# instruction boundary check is valid on x86 (at this moment)
81case $(uname -m) in
82 x86_64|i[3456]86)
83 echo 'p vfs_read' > kprobe_events
84 if grep -q FTRACE ../kprobes/list ; then
85 check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled)
86 fi
87 ;;
88esac
89
90# multiprobe errors
91if grep -q "Create/append/" README && grep -q "imm-value" README; then
92echo 'p:kprobes/testevent _do_fork' > kprobe_events
93check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE
94echo 'p:kprobes/testevent _do_fork abcd=\1' > kprobe_events
95check_error 'p:kprobes/testevent _do_fork ^bcd=\1' # DIFF_ARG_TYPE
96check_error 'p:kprobes/testevent _do_fork ^abcd=\1:u8' # DIFF_ARG_TYPE
97check_error 'p:kprobes/testevent _do_fork ^abcd=\"foo"' # DIFF_ARG_TYPE
98check_error '^p:kprobes/testevent _do_fork abcd=\1' # SAME_PROBE
99fi
100
101exit 0