This is a note to let you know that I've just added the patch titled
tracing: Fix issue of missing one synthetic field
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-fix-issue-of-missing-one-synthetic-field.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ff4837f7fe59ff018eca4705a70eca5e0b486b97 Mon Sep 17 00:00:00 2001
From: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
Date: Wed, 7 Dec 2022 17:15:57 +0800
Subject: tracing: Fix issue of missing one synthetic field
From: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
commit ff4837f7fe59ff018eca4705a70eca5e0b486b97 upstream.
The maximum number of synthetic fields supported is defined as
SYNTH_FIELDS_MAX which value currently is 64, but it actually fails
when try to generate a synthetic event with 64 fields by executing like:
# echo "my_synth_event int v1; int v2; int v3; int v4; int v5; int v6;\
int v7; int v8; int v9; int v10; int v11; int v12; int v13; int v14;\
int v15; int v16; int v17; int v18; int v19; int v20; int v21; int v22;\
int v23; int v24; int v25; int v26; int v27; int v28; int v29; int v30;\
int v31; int v32; int v33; int v34; int v35; int v36; int v37; int v38;\
int v39; int v40; int v41; int v42; int v43; int v44; int v45; int v46;\
int v47; int v48; int v49; int v50; int v51; int v52; int v53; int v54;\
int v55; int v56; int v57; int v58; int v59; int v60; int v61; int v62;\
int v63; int v64" >> /sys/kernel/tracing/synthetic_events
Correct the field counting to fix it.
Link: https://lore.kernel.org/linux-trace-kernel/20221207091557.3137904-1-zhengyejian1@xxxxxxxxxx
Cc: <mhiramat@xxxxxxxxxx>
Cc: <zanussi@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: c9e759b1e845 ("tracing: Rework synthetic event command parsing")
Signed-off-by: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/trace/trace_events_synth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/trace/trace_events_synth.c
+++ b/kernel/trace/trace_events_synth.c
@@ -1282,12 +1282,12 @@ static int __create_synth_event(const ch
goto err_free_arg;
}
- fields[n_fields++] = field;
if (n_fields == SYNTH_FIELDS_MAX) {
synth_err(SYNTH_ERR_TOO_MANY_FIELDS, 0);
ret = -EINVAL;
goto err_free_arg;
}
+ fields[n_fields++] = field;
n_fields_this_loop++;
}
Patches currently in stable-queue which might be from zhengyejian1@xxxxxxxxxx are
queue-6.0/tracing-fix-issue-of-missing-one-synthetic-field.patch
queue-6.0/tracing-hist-fix-wrong-return-value-in-parse_action_params.patch
queue-6.0/tracing-hist-fix-out-of-bound-write-on-action_data.var_ref_idx.patch
