diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-08-20 09:43:21 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 11:15:48 +0200 |
| commit | 821bd4715f8eed4eec8b895e60d7bb415022711e (patch) | |
| tree | 216b79f7e1d9cc97072f157f1cc22a7d2fd6915f /kernel | |
| parent | b37e0f17653c00b586cdbcdf0dbca475358ecffd (diff) | |
| download | linux-stable-821bd4715f8eed4eec8b895e60d7bb415022711e.tar.gz linux-stable-821bd4715f8eed4eec8b895e60d7bb415022711e.tar.bz2 linux-stable-821bd4715f8eed4eec8b895e60d7bb415022711e.zip | |
tracing/probes: Have kprobes and uprobes use $COMM too
commit ab8384442ee512fc0fc72deeb036110843d0e7ff upstream.
Both $comm and $COMM can be used to get current->comm in eprobes and the
filtering and histogram logic. Make kprobes and uprobes consistent in this
regard and allow both $comm and $COMM as well. Currently kprobes and
uprobes only handle $comm, which is inconsistent with the other utilities,
and can be confusing to users.
Link: https://lkml.kernel.org/r/20220820134401.317014913@goodmis.org
Link: https://lore.kernel.org/all/20220820220442.776e1ddaf8836e82edb34d01@kernel.org/
Cc: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Fixes: 533059281ee5 ("tracing: probeevent: Introduce new argument fetching code")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_probe.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index e99c3ce7aa65..d85ee1778b99 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -361,7 +361,7 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t, } } else ret = -EINVAL; - } else if (strcmp(arg, "comm") == 0) { + } else if (strcmp(arg, "comm") == 0 || strcmp(arg, "COMM") == 0) { if (strcmp(t->name, "string") != 0 && strcmp(t->name, "string_size") != 0) return -EINVAL; @@ -544,7 +544,7 @@ int traceprobe_parse_probe_arg(char *arg, ssize_t *size, * The default type of $comm should be "string", and it can't be * dereferenced. */ - if (!t && strcmp(arg, "$comm") == 0) + if (!t && (strcmp(arg, "$comm") == 0 || strcmp(arg, "$COMM") == 0)) t = "string"; parg->type = find_fetch_type(t, ftbl); if (!parg->type) { |