From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Dmitry Rokosov <DDRokosov@sberdevices.ru>,
linux-kernel@vger.kernel.org
Cc: Mark Brown <broonie@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>
Subject: [PATCH v1 1/3] regmap: trace: Remove useless check for NULL for bulk ops
Date: Thu, 1 Sep 2022 16:23:34 +0300 [thread overview]
Message-ID: <20220901132336.33234-1-andriy.shevchenko@linux.intel.com> (raw)
If the buffer pointer is NULL we already are in troubles since
regmap bulk API expects caller to provide valid parameters,
it dereferences that without any checks before we call for
traces.
Moreover, the current code will print garbage in the case of
buffer is NULL and length is not 0.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/base/regmap/trace.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/base/regmap/trace.h b/drivers/base/regmap/trace.h
index 04329ba68ec5..e92edc4f4ca5 100644
--- a/drivers/base/regmap/trace.h
+++ b/drivers/base/regmap/trace.h
@@ -82,8 +82,7 @@ DECLARE_EVENT_CLASS(regmap_bulk,
__assign_str(name, regmap_name(map));
__entry->reg = reg;
__entry->val_len = val_len;
- if (val)
- memcpy(__get_dynamic_array(buf), val, val_len);
+ memcpy(__get_dynamic_array(buf), val, val_len);
),
TP_printk("%s reg=%x val=%s", __get_str(name),
--
2.35.1
next reply other threads:[~2022-09-01 13:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 13:23 Andy Shevchenko [this message]
2022-09-01 13:23 ` [PATCH v1 2/3] regmap: trace: Remove explicit castings Andy Shevchenko
2022-09-01 13:31 ` Mark Brown
2022-09-01 14:18 ` Andy Shevchenko
2022-09-01 14:46 ` Steven Rostedt
2022-09-01 14:50 ` Mark Brown
2022-09-01 15:28 ` Steven Rostedt
2022-09-01 22:22 ` Dmitry Rokosov
2022-09-01 13:23 ` [PATCH v1 3/3] regmap: trace: Remove unneeded blank lines Andy Shevchenko
2022-09-01 22:22 ` Dmitry Rokosov
2022-09-01 22:20 ` [PATCH v1 1/3] regmap: trace: Remove useless check for NULL for bulk ops Dmitry Rokosov
2022-09-05 17:44 ` Mark Brown
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