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| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-08-20 09:43:21 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 11:18:39 +0200 |
| commit | 5c9637279f656b0da817ed9705dfbf86d78186be (patch) | |
| tree | 19a5ff75f5e30af15f02bf8a700e3042af7406ae | |
| parent | 5d8244d42d34e13de423c345ac2b6b66499098dc (diff) | |
| download | linux-stable-5c9637279f656b0da817ed9705dfbf86d78186be.tar.gz linux-stable-5c9637279f656b0da817ed9705dfbf86d78186be.tar.bz2 linux-stable-5c9637279f656b0da817ed9705dfbf86d78186be.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>
| -rw-r--r-- | kernel/trace/trace_probe.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 23e85cb15134..476a685c6b6c 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -300,7 +300,7 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t, } } else goto inval_var; - } else if (strcmp(arg, "comm") == 0) { + } else if (strcmp(arg, "comm") == 0 || strcmp(arg, "COMM") == 0) { code->op = FETCH_OP_COMM; #ifdef CONFIG_HAVE_FUNCTION_ARG_ACCESS_API } else if (((flags & TPARG_FL_MASK) == @@ -595,7 +595,8 @@ static int traceprobe_parse_probe_arg_body(char *arg, ssize_t *size, * Since $comm and immediate string can not be dereferred, * we can find those by strcmp. */ - if (strcmp(arg, "$comm") == 0 || strncmp(arg, "\\\"", 2) == 0) { + if (strcmp(arg, "$comm") == 0 || strcmp(arg, "$COMM") == 0 || + strncmp(arg, "\\\"", 2) == 0) { /* The type of $comm must be "string", and not an array. */ if (parg->count || (t && strcmp(t, "string"))) return -EINVAL; |