tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc

   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
   9 check_error() { # command-with-error-pos-by-^
  10     ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events'
  11 }
  12
  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
  17 fi
  18
  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
  25
  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
  30
  31 check_error 'p vfs_read ^$retval'       # RETVAL_ON_PROBE
  32 check_error 'p vfs_read ^$stack10000'   # BAD_STACK_NUM
  33
  34 if grep -q '$arg<N>' README; then
  35 check_error 'p vfs_read ^$arg10000'     # BAD_ARG_NUM
  36 fi
  37
  38 check_error 'p vfs_read ^$none_var'     # BAD_VAR
  39
  40 check_error 'p vfs_read ^%none_reg'     # BAD_REG_NAME
  41 check_error 'p vfs_read ^@12345678abcde'        # BAD_MEM_ADDR
  42 check_error 'p vfs_read ^@+10'          # FILE_ON_KPROBE
  43
  44 check_error 'p vfs_read ^+0@0)'         # DEREF_NEED_BRACE
  45 check_error 'p vfs_read ^+0ab1(@0)'     # BAD_DEREF_OFFS
  46 check_error 'p vfs_read +0(+0(@0^)'     # DEREF_OPEN_BRACE
  47
  48 if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
  49 check_error 'p vfs_read +0(^$comm)'     # COMM_CANT_DEREF
  50 fi
  51
  52 check_error 'p vfs_read ^&1'            # BAD_FETCH_ARG
  53
  54
  55 # We've introduced this limitation with array support
  56 if grep -q ' <type>\\\[<array-size>\\\]' README; then
  57 check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))'    # TOO_MANY_OPS?
  58 check_error 'p vfs_read +0(@11):u8[10^'         # ARRAY_NO_CLOSE
  59 check_error 'p vfs_read +0(@11):u8[10]^a'       # BAD_ARRAY_SUFFIX
  60 check_error 'p vfs_read +0(@11):u8[^10a]'       # BAD_ARRAY_NUM
  61 check_error 'p vfs_read +0(@11):u8[^256]'       # ARRAY_TOO_BIG
  62 fi
  63
  64 check_error 'p vfs_read @11:^unknown_type'      # BAD_TYPE
  65 check_error 'p vfs_read $stack0:^string'        # BAD_STRING
  66 check_error 'p vfs_read @11:^b10@a/16'          # BAD_BITFIELD
  67
  68 check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG
  69 check_error 'p vfs_read ^=@11'                  # NO_ARG_NAME
  70 check_error 'p vfs_read ^var.1=@11'             # BAD_ARG_NAME
  71 check_error 'p vfs_read var1=@11 ^var1=@12'     # USED_ARG_NAME
  72 check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))'     # ARG_TOO_LONG
  73 check_error 'p vfs_read arg1=^'                 # NO_ARG_BODY
  74
  75 # instruction boundary check is valid on x86 (at this moment)
  76 case $(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     ;;
  83 esac
  84
  85 exit 0