Steven Rostedt (Google) 8479f5ca8b tracing: Stop current tracer when resizing buffer ... [ Upstream commit d78ab79270 ] When the ring buffer is being resized, it can cause side effects to the running tracer. For instance, there's a race with irqsoff tracer that swaps individual per cpu buffers between the main buffer and the snapshot buffer. The resize operation modifies the main buffer and then the snapshot buffer. If a swap happens in between those two operations it will break the tracer. Simply stop the running tracer before resizing the buffers and enable it again when finished. Link: https://lkml.kernel.org/r/20231205220010.748996423@goodmis.org Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Fixes: 3928a8a2d9 ("ftrace: make work with new ring buffer") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-12-13 18:39:23 +01:00
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rv	…
Kconfig	tracing: Fix complicated dependency of CONFIG_TRACER_MAX_TRACE	2023-01-07 11:11:48 +01:00
Makefile	…
blktrace.c	trace/blktrace: fix memory leak with using debugfs_lookup()	2023-03-10 09:33:46 +01:00
bpf_trace.c	fprobe: Pass entry_data to handlers	2023-10-25 12:03:12 +02:00
bpf_trace.h	…
error_report-traces.c	…
fgraph.c	…
fprobe.c	fprobe: Fix to ensure the number of active retprobes is not zero	2023-10-25 12:03:12 +02:00
ftrace.c	ftrace: Fix possible warning on checking all pages used in ftrace_process_locs()	2023-07-23 13:49:44 +02:00
ftrace_internal.h	…
kprobe_event_gen_test.c	tracing: Fix wrong return in kprobe_event_gen_test.c	2023-04-06 12:10:41 +02:00
pid_list.c	…
pid_list.h	…
power-traces.c	…
preemptirq_delay_test.c	…
rethook.c	rethook: Use __rcu pointer for rethook::handler	2023-12-13 18:39:17 +01:00
ring_buffer.c	ring-buffer: Force absolute timestamp on discard of event	2023-12-13 18:39:23 +01:00
ring_buffer_benchmark.c	…
rpm-traces.c	…
synth_event_gen_test.c	tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()	2022-11-17 17:51:38 -05:00
trace.c	tracing: Stop current tracer when resizing buffer	2023-12-13 18:39:23 +01:00
trace.h	tracing: Have trace_event_file have ref counters	2023-11-28 17:07:23 +00:00
trace_benchmark.c	…
trace_benchmark.h	…
trace_boot.c	…
trace_branch.c	…
trace_clock.c	…
trace_dynevent.c	tracing: Free buffers when a used dynamic event is removed	2022-11-23 19:07:12 -05:00
trace_dynevent.h	…
trace_entries.h	…
trace_eprobe.c	kernel/trace: Fix cleanup logic of enable_trace_eprobe	2023-07-23 13:49:24 +02:00
trace_event_perf.c	…
trace_events.c	tracing: Have trace_event_file have ref counters	2023-11-28 17:07:23 +00:00
trace_events_filter.c	tracing: Have trace_event_file have ref counters	2023-11-28 17:07:23 +00:00
trace_events_filter_test.h	…
trace_events_hist.c	tracing: Allow synthetic events to pass around stacktraces	2023-08-03 10:23:55 +02:00
trace_events_inject.c	tracing: Have event inject files inc the trace array ref count	2023-09-23 11:11:11 +02:00
trace_events_synth.c	tracing: Have the user copy of synthetic event address use correct context	2023-11-28 17:07:13 +00:00
trace_events_trigger.c	…
trace_events_user.c	tracing/user_events: Fix struct arg size match check	2023-07-23 13:49:47 +02:00
trace_export.c	tracing: Fix TASK_COMM_LEN in trace event format file	2023-02-14 19:11:54 +01:00
trace_functions.c	…
trace_functions_graph.c	…
trace_hwlat.c	tracing: Remove extra space at the end of hwlat_detector/mode	2023-09-13 09:42:57 +02:00
trace_irqsoff.c	tracing: Fix memleak due to race between current_tracer and trace	2023-08-30 16:11:00 +02:00
trace_kdb.c	…
trace_kprobe.c	tracing/kprobes: Fix the order of argument descriptions	2023-11-20 11:52:18 +01:00
trace_kprobe_selftest.c	…
trace_kprobe_selftest.h	…
trace_mmiotrace.c	…
trace_nop.c	…
trace_osnoise.c	tracing/timerlat: Always wakeup the timerlat thread	2023-06-09 10:34:24 +02:00
trace_output.c	tracing: Make sure trace_printk() can output as soon as it can be used	2023-02-01 08:34:37 +01:00
trace_output.h	…
trace_preemptirq.c	…
trace_printk.c	…
trace_probe.c	Revert "tracing: Add "(fault)" name injection to kernel probes"	2023-08-03 10:23:55 +02:00
trace_probe.h	tracing/kprobes: Return EADDRNOTAVAIL when func matches several symbols	2023-10-25 12:03:16 +02:00
trace_probe_kernel.h	tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails	2023-08-03 10:23:55 +02:00
trace_probe_tmpl.h	tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails	2023-08-03 10:23:55 +02:00
trace_recursion_record.c	…
trace_sched_switch.c	…
trace_sched_wakeup.c	tracing: Fix memleak due to race between current_tracer and trace	2023-08-30 16:11:00 +02:00
trace_selftest.c	…
trace_selftest_dynamic.c	…
trace_seq.c	…
trace_stack.c	…
trace_stat.c	…
trace_stat.h	…
trace_synth.h	tracing: Allow synthetic events to pass around stacktraces	2023-08-03 10:23:55 +02:00
trace_syscalls.c	tracing: Remove unused __bad_type_size() method	2022-11-17 20:21:06 -05:00
trace_uprobe.c	bpf: Clear the probe_addr for uprobe	2023-09-13 09:42:30 +02:00
tracing_map.c	tracing: Remove unused variable 'dups'	2022-10-03 12:20:31 -04:00
tracing_map.h	…