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Code Issues Releases Wiki Activity

rtla: Avoid record NULL pointer dereference

Browse source 
Fix the following null/deref_null.cocci errors:
./tools/tracing/rtla/src/osnoise_hist.c:870:31-36: ERROR: record is NULL but dereferenced.
./tools/tracing/rtla/src/osnoise_top.c:650:31-36: ERROR: record is NULL but dereferenced.
./tools/tracing/rtla/src/timerlat_hist.c:905:31-36: ERROR: record is NULL but dereferenced.
./tools/tracing/rtla/src/timerlat_top.c:700:31-36: ERROR: record is NULL but dereferenced.

"record" is NULL before calling osnoise_init_trace_tool.
Add a tag "out_free" to avoid dereferring a NULL pointer.

Link: https://lkml.kernel.org/r/ae0e4500d383db0884eb2820286afe34ca303778.1651247710.git.bristot@kernel.org
Link: https://lore.kernel.org/r/20220408151406.34823-1-wanjiabing@vivo.com/

Cc: kael_w@yeah.net
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Fixes: 51d64c3a18 ("rtla: Add -e/--event support")
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Wan Jiabing 2022-04-29 18:28:10 +02:00 committed by Steven Rostedt (Google)
parent fe4d0d5dde
commit 2a6b52ed72
4 changed files with 20 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
tools/tracing/rtla/src/osnoise_hist.c
View file

@ -809,7 +809,7 @@ int osnoise_hist_main(int argc, char *argv[])
retval = set_comm_sched_attr("osnoise/", &params->sched_param);
if (retval) {
err_msg("Failed to set sched parameters\n");
goto out_hist;
goto out_free;
}
}
@ -819,7 +819,7 @@ int osnoise_hist_main(int argc, char *argv[])
record = osnoise_init_trace_tool("osnoise");
if (!record) {
err_msg("Failed to enable the trace instance\n");
goto out_hist;
goto out_free;
}
if (params->events) {
@ -869,6 +869,7 @@ int osnoise_hist_main(int argc, char *argv[])
out_hist:
trace_events_destroy(&record->trace, params->events);
params->events = NULL;
out_free:
osnoise_free_histogram(tool->data);
out_destroy:
osnoise_destroy_tool(record);

9
tools/tracing/rtla/src/osnoise_top.c
View file

@ -572,7 +572,7 @@ int osnoise_top_main(int argc, char **argv)
retval = osnoise_top_apply_config(tool, params);
if (retval) {
err_msg("Could not apply config\n");
goto out_top;
goto out_free;
}
trace = &tool->trace;
@ -580,14 +580,14 @@ int osnoise_top_main(int argc, char **argv)
retval = enable_osnoise(trace);
if (retval) {
err_msg("Failed to enable osnoise tracer\n");
goto out_top;
goto out_free;
}
if (params->set_sched) {
retval = set_comm_sched_attr("osnoise/", &params->sched_param);
if (retval) {
err_msg("Failed to set sched parameters\n");
goto out_top;
goto out_free;
}
}
@ -597,7 +597,7 @@ int osnoise_top_main(int argc, char **argv)
record = osnoise_init_trace_tool("osnoise");
if (!record) {
err_msg("Failed to enable the trace instance\n");
goto out_top;
goto out_free;
}
if (params->events) {
@ -649,6 +649,7 @@ int osnoise_top_main(int argc, char **argv)
out_top:
trace_events_destroy(&record->trace, params->events);
params->events = NULL;
out_free:
osnoise_free_top(tool->data);
osnoise_destroy_tool(record);
osnoise_destroy_tool(tool);

11
tools/tracing/rtla/src/timerlat_hist.c
View file

@ -821,7 +821,7 @@ int timerlat_hist_main(int argc, char *argv[])
retval = timerlat_hist_apply_config(tool, params);
if (retval) {
err_msg("Could not apply config\n");
goto out_hist;
goto out_free;
}
trace = &tool->trace;
@ -829,14 +829,14 @@ int timerlat_hist_main(int argc, char *argv[])
retval = enable_timerlat(trace);
if (retval) {
err_msg("Failed to enable timerlat tracer\n");
goto out_hist;
goto out_free;
}
if (params->set_sched) {
retval = set_comm_sched_attr("timerlat/", &params->sched_param);
if (retval) {
err_msg("Failed to set sched parameters\n");
goto out_hist;
goto out_free;
}
}
@ -844,7 +844,7 @@ int timerlat_hist_main(int argc, char *argv[])
dma_latency_fd = set_cpu_dma_latency(params->dma_latency);
if (dma_latency_fd < 0) {
err_msg("Could not set /dev/cpu_dma_latency.\n");
goto out_hist;
goto out_free;
}
}
@ -854,7 +854,7 @@ int timerlat_hist_main(int argc, char *argv[])
record = osnoise_init_trace_tool("timerlat");
if (!record) {
err_msg("Failed to enable the trace instance\n");
goto out_hist;
goto out_free;
}
if (params->events) {
@ -904,6 +904,7 @@ int timerlat_hist_main(int argc, char *argv[])
close(dma_latency_fd);
trace_events_destroy(&record->trace, params->events);
params->events = NULL;
out_free:
timerlat_free_histogram(tool->data);
osnoise_destroy_tool(record);
osnoise_destroy_tool(tool);

11
tools/tracing/rtla/src/timerlat_top.c
View file

@ -612,7 +612,7 @@ int timerlat_top_main(int argc, char *argv[])
retval = timerlat_top_apply_config(top, params);
if (retval) {
err_msg("Could not apply config\n");
goto out_top;
goto out_free;
}
trace = &top->trace;
@ -620,14 +620,14 @@ int timerlat_top_main(int argc, char *argv[])
retval = enable_timerlat(trace);
if (retval) {
err_msg("Failed to enable timerlat tracer\n");
goto out_top;
goto out_free;
}
if (params->set_sched) {
retval = set_comm_sched_attr("timerlat/", &params->sched_param);
if (retval) {
err_msg("Failed to set sched parameters\n");
goto out_top;
goto out_free;
}
}
@ -635,7 +635,7 @@ int timerlat_top_main(int argc, char *argv[])
dma_latency_fd = set_cpu_dma_latency(params->dma_latency);
if (dma_latency_fd < 0) {
err_msg("Could not set /dev/cpu_dma_latency.\n");
goto out_top;
goto out_free;
}
}
@ -645,7 +645,7 @@ int timerlat_top_main(int argc, char *argv[])
record = osnoise_init_trace_tool("timerlat");
if (!record) {
err_msg("Failed to enable the trace instance\n");
goto out_top;
goto out_free;
}
if (params->events) {
@ -699,6 +699,7 @@ int timerlat_top_main(int argc, char *argv[])
close(dma_latency_fd);
trace_events_destroy(&record->trace, params->events);
params->events = NULL;
out_free:
timerlat_free_top(top->data);
osnoise_destroy_tool(record);
osnoise_destroy_tool(top);