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linke li fb8579acac ring-buffer: use READ_ONCE() to read cpu_buffer->commit_page in concurrent environment 
[ Upstream commit f1e30cb636 ]

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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Kconfig
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Makefile tracing/probes: Move finding func-proto API and getting func-param API to trace_btf 2023-08-23 09:39:45 +09:00
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 fprobe: Fix to ensure the number of active retprobes is not zero 2023-10-17 10:22:42 +09:00
ftrace.c tracing: Fix HAVE_DYNAMIC_FTRACE_WITH_REGS ifdef 2024-02-23 09:25:17 +01:00
ftrace_internal.h
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kprobe_event_gen_test.c
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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.c ring-buffer: use READ_ONCE() to read cpu_buffer->commit_page in concurrent environment 2024-04-13 13:07:38 +02:00
ring_buffer_benchmark.c
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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.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
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 tracing/probes: Add a function to search a member of a struct/union 2023-08-23 09:40:16 +09:00
trace_clock.c
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trace_dynevent.c
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trace_dynevent.h
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trace_entries.h tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure 2023-07-30 18:11:44 -04:00
trace_eprobe.c tracing/probes: Support BTF argument on module functions 2023-08-23 09:39:15 +09:00
trace_event_perf.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_events_filter.c tracing: Have trace_event_file have ref counters 2023-11-08 11:56:21 +01:00
trace_events_filter_test.h
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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 tracing: Have event inject files inc the trace array ref count 2023-09-07 16:38:54 -04:00
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 tracing/user_events: Align set_bit() address for all archs 2023-09-30 16:25:41 -04:00
trace_export.c tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure 2023-07-30 18:11:44 -04:00
trace_fprobe.c tracing: fprobe-event: Fix to check tracepoint event and return 2023-11-28 17:20:13 +00:00
trace_functions.c
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trace_functions_graph.c
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trace_hwlat.c tracing: Remove extra space at the end of hwlat_detector/mode 2023-09-01 21:00:00 -04:00
trace_irqsoff.c tracing: Fix memleak due to race between current_tracer and trace 2023-08-17 13:49:37 -04:00
trace_kdb.c
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trace_kprobe.c tracing/kprobes: Fix the order of argument descriptions 2023-11-20 11:59:38 +01:00
trace_kprobe_selftest.c
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trace_kprobe_selftest.h
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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.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_probe_kernel.h tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails 2023-07-14 17:04:58 +09:00
trace_probe_tmpl.h tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails 2023-07-14 17:04:58 +09:00
trace_recursion_record.c
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trace_sched_switch.c
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trace_sched_wakeup.c tracing: Fix memleak due to race between current_tracer and trace 2023-08-17 13:49:37 -04:00
trace_selftest.c
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trace_selftest_dynamic.c
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trace_seq.c tracing: Fix kernel-doc warnings in trace_seq.c 2023-07-28 19:59:04 -04:00
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 tracing: bpf: use struct trace_entry in struct syscall_tp_t 2023-08-01 10:53:28 -07:00
trace_uprobe.c Probes updates for v6.6: 2023-09-02 11:10:50 -07:00
tracing_map.c tracing: Ensure visibility when inserting an element into tracing_map 2024-01-31 16:19:01 -08:00
tracing_map.h tracing: Remove unused extern declaration tracing_map_set_field_descr() 2023-07-23 11:08:14 -04:00