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 ^$none_var' # BAD_VAR
39
40check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME
41check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR
42check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE
43
44check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE
45check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS
46check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE
47
48if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
49check_error 'p vfs_read +0(^$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