From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
kbuild test robot <fengguang.wu@intel.com>
Subject: [for-next][PATCH 30/30] tracing: Fix unsigned comparison to zero in hist trigger code
Date: Wed, 20 Apr 2016 15:30:08 -0400 [thread overview]
Message-ID: <20160420193031.378245561@goodmis.org> (raw)
In-Reply-To: <20160420192938.515326341@goodmis.org>
[-- Attachment #1: 0030-tracing-Fix-unsigned-comparison-to-zero-in-hist-trig.patch --]
[-- Type: text/plain, Size: 1443 bytes --]
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
Fengguang Wu's bot found two comparisons of unsigned integers to zero. These
were real bugs, as it would miss error conditions returned to zero.
trace_events_hist.c:426:6-9: WARNING: Unsigned expression compared with zero: idx < 0
trace_events_hist.c:568:5-14: WARNING: Unsigned expression compared with zero: n_entries < 0
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace_events_hist.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 23df38aab503..f98b6b3a2804 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -734,7 +734,7 @@ static int create_tracing_map_fields(struct hist_trigger_data *hist_data)
struct tracing_map *map = hist_data->map;
struct ftrace_event_field *field;
struct hist_field *hist_field;
- unsigned int i, idx;
+ int i, idx;
for_each_hist_field(i, hist_data) {
hist_field = hist_data->fields[i];
@@ -1036,7 +1036,7 @@ static int print_entries(struct seq_file *m,
{
struct tracing_map_sort_entry **sort_entries = NULL;
struct tracing_map *map = hist_data->map;
- unsigned int i, n_entries;
+ int i, n_entries;
n_entries = tracing_map_sort_entries(map, hist_data->sort_keys,
hist_data->n_sort_keys,
--
2.8.0.rc3
prev parent reply other threads:[~2016-04-20 19:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-20 19:29 [for-next][PATCH 00/30] tracing: Add features for event-fork and histograms Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 01/30] tracing: Rename check_ignore_pid() to ignore_this_task() Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 02/30] tracing: Use pid bitmap instead of a pid array for set_event_pid Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 03/30] tracing: Add infrastructure to allow set_event_pid to follow children Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 04/30] tracing: Update the documentation to describe "event-fork" option Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 05/30] tracing: Add lock-free tracing_map Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 06/30] tracing: Fix TRACING_MAP Kconfig Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 07/30] tracing: Update some tracing_map constants and comments Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 08/30] tracing: Add hist event trigger command Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 09/30] tracing: Add hist trigger support for multiple values (vals= param) Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 10/30] tracing: Add hist trigger support for compound keys Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 11/30] tracing: Add hist trigger support for user-defined sorting (sort= param) Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 12/30] tracing: Add hist trigger support for pausing and continuing a trace Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 13/30] tracing: Add hist trigger support for clearing " Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 14/30] tracing: Add hist trigger hex modifier for displaying numeric fields Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 15/30] tracing: Add hist trigger sym and sym-offset modifiers Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 16/30] tracing: Add hist trigger execname modifier Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 17/30] tracing: Add hist trigger syscall modifier Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 18/30] tracing: Add hist trigger support for stacktraces as keys Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 19/30] tracing: Support string type key properly Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 20/30] tracing: Remove restriction on string position in hist trigger keys Steven Rostedt
2016-04-20 19:29 ` [for-next][PATCH 21/30] tracing: Add enable_hist/disable_hist triggers Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 22/30] tracing: Add hist trigger Documentation Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 23/30] tracing: Add support for multiple hist triggers per event Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 24/30] tracing: Add support for named triggers Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 25/30] tracing: Add support for named hist triggers Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 26/30] kselftests/ftrace : Add event trigger testcases Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 27/30] kselftests/ftrace: Add hist " Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 28/30] tracing: Add hist trigger log2 modifier Steven Rostedt
2016-04-20 19:30 ` [for-next][PATCH 29/30] kselftests/ftrace: Add a test for log2 modifier of hist trigger Steven Rostedt
2016-04-20 19:30 ` Steven Rostedt [this message]
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