* FAILED: patch "[PATCH] tracing/probes: Have kprobes and uprobes use $COMM too" failed to apply to 5.10-stable tree
@ 2022-08-22 7:29 gregkh
2022-08-22 16:17 ` Steven Rostedt
0 siblings, 1 reply; 2+ messages in thread
From: gregkh @ 2022-08-22 7:29 UTC (permalink / raw)
To: rostedt, akpm, mhiramat, mingo, tz.stoyanov, zanussi; +Cc: stable
The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From ab8384442ee512fc0fc72deeb036110843d0e7ff Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
Date: Sat, 20 Aug 2022 09:43:21 -0400
Subject: [PATCH] tracing/probes: Have kprobes and uprobes use $COMM too
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 $comm, which is inconsistent with the other utilities,
and can be confusing to users.
Link: https://lkml.kernel.org/r/20220820134401.317014913@goodmis.org
Link: https://lore.kernel.org/all/20220820220442.776e1ddaf8836e82edb34d01@kernel.org/
Cc: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Fixes: 533059281ee5 ("tracing: probeevent: Introduce new argument fetching code")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 4daabbb8b772..36dff277de46 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -314,7 +314,7 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t,
}
} else
goto inval_var;
- } else if (strcmp(arg, "comm") == 0) {
+ } else if (strcmp(arg, "comm") == 0 || strcmp(arg, "COMM") == 0) {
code->op = FETCH_OP_COMM;
#ifdef CONFIG_HAVE_FUNCTION_ARG_ACCESS_API
} else if (((flags & TPARG_FL_MASK) ==
@@ -625,7 +625,8 @@ static int traceprobe_parse_probe_arg_body(const char *argv, ssize_t *size,
* we can find those by strcmp. But ignore for eprobes.
*/
if (!(flags & TPARG_FL_TPOINT) &&
- (strcmp(arg, "$comm") == 0 || strncmp(arg, "\\\"", 2) == 0)) {
+ (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")))
goto out;
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: FAILED: patch "[PATCH] tracing/probes: Have kprobes and uprobes use $COMM too" failed to apply to 5.10-stable tree
2022-08-22 7:29 FAILED: patch "[PATCH] tracing/probes: Have kprobes and uprobes use $COMM too" failed to apply to 5.10-stable tree gregkh
@ 2022-08-22 16:17 ` Steven Rostedt
0 siblings, 0 replies; 2+ messages in thread
From: Steven Rostedt @ 2022-08-22 16:17 UTC (permalink / raw)
To: gregkh; +Cc: akpm, mhiramat, mingo, tz.stoyanov, zanussi, stable
Below is the backport to 5.10 and 5.4.
-- Steve
------------------ original commit in Linus's tree ------------------
>From ab8384442ee512fc0fc72deeb036110843d0e7ff Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
Date: Sat, 20 Aug 2022 09:43:21 -0400
Subject: [PATCH] tracing/probes: Have kprobes and uprobes use $COMM too
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>
---
kernel/trace/trace_probe.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Index: linux-test.git/kernel/trace/trace_probe.c
===================================================================
--- linux-test.git.orig/kernel/trace/trace_probe.c 2022-08-22 11:11:31.068828616 -0400
+++ linux-test.git/kernel/trace/trace_probe.c 2022-08-22 11:13:36.916829113 -0400
@@ -300,7 +300,7 @@ static int parse_probe_vars(char *arg, c
}
} 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_bo
* 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;
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-08-22 7:29 FAILED: patch "[PATCH] tracing/probes: Have kprobes and uprobes use $COMM too" failed to apply to 5.10-stable tree gregkh
2022-08-22 16:17 ` Steven Rostedt
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