2 # SPDX-License-Identifier: GPL-2.0
3 # description: Kprobe event parser error log check
5 [ -f kprobe_events ] || exit_unsupported # this is configurable
7 [ -f error_log ] || exit_unsupported
9 check_error() { # command-with-error-pos-by-^
10 ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events'
13 if grep -q 'r\[maxactive\]' README; then
14 check_error 'p^100 vfs_read' # MAXACT_NO_KPROBE
15 check_error 'r^1a111 vfs_read' # BAD_MAXACT
16 check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG
19 check_error 'p ^non_exist_func' # BAD_PROBE_ADDR (enoent)
20 check_error 'p ^hoge-fuga' # BAD_PROBE_ADDR (bad syntax)
21 check_error 'p ^hoge+1000-1000' # BAD_PROBE_ADDR (bad syntax)
22 check_error 'r ^vfs_read+10' # BAD_RETPROBE
23 check_error 'p:^/bar vfs_read' # NO_GROUP_NAME
24 check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG
26 check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME
27 check_error 'p:foo/^ vfs_read' # NO_EVENT_NAME
28 check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG
29 check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME
31 check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE
32 check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM
34 if grep -q '$arg<N>' README; then
35 check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM
38 check_error 'p vfs_read ^$none_var' # BAD_VAR
40 check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME
41 check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR
42 check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE
44 grep -q "imm-value" README && \
45 check_error 'p vfs_read arg1=\^x' # BAD_IMM
46 grep -q "imm-string" README && \
47 check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE
49 check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE
50 check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS
51 check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE
53 if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
54 check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF
57 check_error 'p vfs_read ^&1' # BAD_FETCH_ARG
60 # We've introduced this limitation with array support
61 if grep -q ' <type>\\\[<array-size>\\\]' README; then
62 check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS?
63 check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE
64 check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX
65 check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM
66 check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG
69 check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE
70 check_error 'p vfs_read $stack0:^string' # BAD_STRING
71 check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD
73 check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG
74 check_error 'p vfs_read ^=@11' # NO_ARG_NAME
75 check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME
76 check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME
77 check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG
78 check_error 'p vfs_read arg1=^' # NO_ARG_BODY
80 # instruction boundary check is valid on x86 (at this moment)
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)
91 if grep -q "Create/append/" README && grep -q "imm-value" README; then
92 echo 'p:kprobes/testevent _do_fork' > kprobe_events
93 check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE
94 echo 'p:kprobes/testevent _do_fork abcd=\1' > kprobe_events
95 check_error 'p:kprobes/testevent _do_fork ^bcd=\1' # DIFF_ARG_TYPE
96 check_error 'p:kprobes/testevent _do_fork ^abcd=\1:u8' # DIFF_ARG_TYPE
97 check_error 'p:kprobes/testevent _do_fork ^abcd=\"foo"' # DIFF_ARG_TYPE
98 check_error '^p:kprobes/testevent _do_fork abcd=\1' # SAME_PROBE