Masami Hiramatsu e8f436c0f1 tracing: Fix event trigger to accept redundant spaces ...

commit 6784beada6 upstream.

Fix the event trigger to accept redundant spaces in
the trigger input.

For example, these return -EINVAL

echo " traceon" > events/ftrace/print/trigger
echo "traceon  if common_pid == 0" > events/ftrace/print/trigger
echo "disable_event:kmem:kmalloc " > events/ftrace/print/trigger

But these are hard to find what is wrong.

To fix this issue, use skip_spaces() to remove spaces
in front of actual tokens, and set NULL if there is no
token.

Link: http://lkml.kernel.org/r/159262476352.185015.5261566783045364186.stgit@devnote2

Cc: Tom Zanussi <zanussi@kernel.org>
Cc: stable@vger.kernel.org
Fixes: 85f2b08268 ("tracing: Add basic event trigger framework")
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-06-30 23:17:17 -04:00

..

blktrace.c

blktrace: break out of blktrace setup on concurrent calls

2020-06-30 23:17:15 -04:00

bpf_trace.c

bpf: fix nested bpf tracepoints with per-cpu data

2019-07-03 13:14:48 +02:00

ftrace.c

ftrace: fpid_next() should increase position index

2020-02-24 08:34:52 +01:00

Kconfig

Stop the ad-hoc games with -Wno-maybe-initialized

2020-05-20 08:18:45 +02:00

Makefile

tracing: Allow gcov profiling on only ftrace subsystem

2018-08-21 09:11:49 -04:00

power-traces.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

preemptirq_delay_test.c

tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c

2018-10-17 15:35:33 -04:00

ring_buffer_benchmark.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

ring_buffer.c

trace: Fix preempt_enable_no_resched() abuse

2019-05-02 09:58:54 +02:00

rpm-traces.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

trace_benchmark.c

rcu: Rename cond_resched_rcu_qs() to cond_resched_tasks_rcu_qs()

2018-05-15 10:27:29 -07:00

trace_benchmark.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_branch.c

Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"

2019-07-03 13:14:41 +02:00

trace_clock.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_entries.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_event_perf.c

tracing: Fix race in perf_trace_buf initialization

2019-10-29 09:20:03 +01:00

trace_events_filter_test.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_events_filter.c

tracing: Avoid memory leak in process_system_preds()

2020-01-09 10:19:02 +01:00

trace_events_hist.c

tracing: Fix histogram code when expression has same var as value

2020-01-29 16:43:23 +01:00

trace_events_trigger.c

tracing: Fix event trigger to accept redundant spaces

2020-06-30 23:17:17 -04:00

trace_events.c

tracing: Fix lock inversion in trace_event_enable_tgid_record()

2020-01-09 10:19:02 +01:00

trace_export.c

tracing: Add trigger file for trace_markers tracefs/ftrace/print

2018-05-29 08:28:53 -04:00

trace_functions_graph.c

tracing/fgraph: Fix set_graph_function from showing interrupts

2018-12-08 12:59:07 +01:00

trace_functions.c

tracing: Update stack trace skipping for ORC unwinder

2018-01-23 15:57:00 -05:00

trace_hwlat.c

tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency

2019-10-17 13:45:39 -07:00

trace_irqsoff.c

tracing/fgraph: Fix set_graph_function from showing interrupts

2018-12-08 12:59:07 +01:00

trace_kdb.c

tracing: Silence GCC 9 array bounds warning

2019-06-25 11:35:52 +08:00

trace_kprobe_selftest.c

selftest/ftrace: Move kprobe selftest function to separate compile unit

2018-07-30 18:41:04 -04:00

trace_kprobe_selftest.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_kprobe.c

tracing/kprobes: Fix a double initialization typo

2020-05-14 07:57:16 +02:00

trace_mmiotrace.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

trace_nop.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

trace_output.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_output.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_preemptirq.c

tracing: More reverting of "tracing: Centralize preemptirq tracepoints and unify their usage"

2018-08-10 15:12:00 -04:00

trace_printk.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_probe.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_probe.h

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_sched_switch.c

tracing: Fix sched switch start/stop refcount racy updates

2020-02-11 04:33:55 -08:00

trace_sched_wakeup.c

kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail

2020-01-14 20:06:59 +01:00

trace_selftest_dynamic.c

ftrace: Mark function tracer test functions noinline/noclone

2018-01-23 15:57:29 -05:00

trace_selftest.c

Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2017-11-17 14:58:01 -08:00

trace_seq.c

tracing: Add SPDX License format tags to tracing files

2018-08-16 19:08:06 -04:00

trace_stack.c

tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined

2020-01-14 20:06:59 +01:00

trace_stat.c

tracing: Fix very unlikely race of registering two stat tracers

2020-02-24 08:34:39 +01:00

trace_stat.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00

trace_syscalls.c

Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2017-11-17 14:58:01 -08:00

trace_uprobe.c

tracing/uprobes: Fix output for multiple string arguments

2019-02-20 10:25:48 +01:00

trace.c

tracing: Add a vmalloc_sync_mappings() for safe measure

2020-05-14 07:57:20 +02:00

trace.h

ftrace: Protect ftrace_graph_hash with ftrace_sync

2020-02-11 04:34:05 -08:00

tracing_map.c

tracing: Have the histogram compare functions convert to u64 first

2020-01-09 10:19:02 +01:00

tracing_map.h

tracing: Fix SPDX format headers to use C++ style comments

2018-08-16 19:08:06 -04:00