linke li fb8579acac ring-buffer: use READ_ONCE() to read cpu_buffer->commit_page in concurrent environment ...

[ Upstream commit f1e30cb6369251c03f63c564006f96a54197dcc4 ]

In function ring_buffer_iter_empty(), cpu_buffer->commit_page is read
while other threads may change it. It may cause the time_stamp that read
in the next line come from a different page. Use READ_ONCE() to avoid
having to reason about compiler optimizations now and in future.

Link: https://lore.kernel.org/linux-trace-kernel/tencent_DFF7D3561A0686B5E8FC079150A02505180A@qq.com

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: linke li <lilinke99@qq.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-04-13 13:07:38 +02:00

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rv

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blktrace.c

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bpf_trace.c

bpf: support deferring bpf_link dealloc to after RCU grace period

2024-04-10 16:36:06 +02:00

bpf_trace.h

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error_report-traces.c

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fgraph.c

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fprobe.c

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ftrace_internal.h

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ftrace.c

tracing: Fix HAVE_DYNAMIC_FTRACE_WITH_REGS ifdef

2024-02-23 09:25:17 +01:00

Kconfig

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kprobe_event_gen_test.c

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Makefile

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pid_list.c

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pid_list.h

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power-traces.c

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preemptirq_delay_test.c

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rethook.c

rethook: Use __rcu pointer for rethook::handler

2023-12-13 18:45:19 +01:00

ring_buffer_benchmark.c

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ring_buffer.c

ring-buffer: use READ_ONCE() to read cpu_buffer->commit_page in concurrent environment

2024-04-13 13:07:38 +02:00

rpm-traces.c

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synth_event_gen_test.c

tracing / synthetic: Disable events after testing in synth_event_gen_test_init()

2024-01-01 12:42:45 +00:00

trace_benchmark.c

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trace_benchmark.h

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trace_boot.c

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trace_branch.c

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trace_btf.c

tracing/probes: Fix to search structure fields correctly

2024-02-23 09:25:05 +01:00

trace_btf.h

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trace_clock.c

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trace_dynevent.c

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trace_dynevent.h

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trace_entries.h

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trace_eprobe.c

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trace_event_perf.c

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trace_events_filter_test.h

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trace_events_filter.c

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trace_events_hist.c

tracing: Fix uaf issue when open the hist or hist_debug file

2024-01-20 11:51:43 +01:00

trace_events_inject.c

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trace_events_synth.c

tracing/synthetic: Fix trace_string() return value

2024-02-23 09:25:05 +01:00

trace_events_trigger.c

tracing/trigger: Fix to return error if failed to alloc snapshot

2024-02-23 09:24:54 +01:00

trace_events_user.c

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trace_events.c

tracing: Fix a NULL vs IS_ERR() bug in event_subsystem_dir()

2024-02-23 09:25:28 +01:00

trace_export.c

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trace_fprobe.c

tracing: fprobe-event: Fix to check tracepoint event and return

2023-11-28 17:20:13 +00:00

trace_functions_graph.c

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trace_functions.c

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trace_hwlat.c

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trace_irqsoff.c

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trace_kdb.c

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trace_kprobe_selftest.c

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trace_kprobe_selftest.h

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trace_kprobe.c

tracing/kprobes: Fix the order of argument descriptions

2023-11-20 11:59:38 +01:00

trace_mmiotrace.c

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trace_nop.c

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trace_osnoise.c

tracing/timerlat: Move hrtimer_init to timerlat_fd open()

2024-02-23 09:25:05 +01:00

trace_output.c

tracing: Add size check when printing trace_marker output

2024-01-20 11:51:43 +01:00

trace_output.h

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trace_preemptirq.c

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trace_printk.c

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trace_probe_kernel.h

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trace_probe_tmpl.h

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trace_probe.c

tracing/probes: Fix to set arg size and fmt after setting type from BTF

2024-02-23 09:25:05 +01:00

trace_probe.h

tracing/probes: Fix to show a parse error for bad type for $comm

2024-02-23 09:25:05 +01:00

trace_recursion_record.c

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trace_sched_switch.c

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trace_sched_wakeup.c

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trace_selftest_dynamic.c

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trace_selftest.c

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trace_seq.c

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trace_stack.c

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trace_stat.c

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trace_stat.h

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trace_synth.h

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trace_syscalls.c

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trace_uprobe.c

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trace.c

tracing: Use .flush() call to wake up readers

2024-04-03 15:28:41 +02:00

trace.h

eventfs: Remove eventfs_file and just use eventfs_inode

2024-02-23 09:25:19 +01:00

tracing_map.c

tracing: Ensure visibility when inserting an element into tracing_map

2024-01-31 16:19:01 -08:00

tracing_map.h

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