Steven Rostedt (VMware)
43e172e31b
tracing: Move pipe reference to trace array instead of current_tracer ...
commit 7ef282e05132d56b6f6b71e3873f317664bea78b upstream.
If a process has the trace_pipe open on a trace_array, the current tracer
for that trace array should not be changed. This was original enforced by a
global lock, but when instances were introduced, it was moved to the
current_trace. But this structure is shared by all instances, and a
trace_pipe is for a single instance. There's no reason that a process that
has trace_pipe open on one instance should prevent another instance from
changing its current tracer. Move the reference counter to the trace_array
instead.
This is marked as "Fixes" but is more of a clean up than a true fix.
Backport if you want, but its not critical.
Fixes: cf6ab6d914
2020-08-21 13:05:27 +02:00
blktrace: fix debugfs use after free
2020-08-19 08:15:55 +02:00
bpf: Fix deadlock with rq_lock in bpf_send_signal()
2020-04-17 10:49:57 +02:00
ftrace: Look up the address of return_to_handler() using helpers
2019-09-18 12:24:47 +10:00
tracing: Use trace_sched_process_free() instead of exit() for pid tracing
2020-08-21 13:05:27 +02:00
treewide: Rename rcu_dereference_raw_notrace() to _check()
2019-08-01 14:16:21 -07:00
Stop the ad-hoc games with -Wno-maybe-initialized
2020-05-20 08:20:28 +02:00
ring-buffer: Zero out time extend if it is nested and not absolute
2020-06-30 15:37:10 -04:00
tracing: Use CONFIG_PREEMPTION
2019-07-31 19:03:35 +02:00
tracing: Move pipe reference to trace array instead of current_tracer
2020-08-21 13:05:27 +02:00
tracing: Move pipe reference to trace array instead of current_tracer
2020-08-21 13:05:27 +02:00
tracing: Add tracing_check_open_get_tr()
2019-10-12 20:44:07 -04:00
tracing/dynevent: Pass extra arguments to match operation
2019-08-31 12:19:38 -04:00
tracing: Fix race in perf_trace_buf initialization
2019-10-21 19:38:28 -04:00
tracing: Use trace_sched_process_free() instead of exit() for pid tracing
2020-08-21 13:05:27 +02:00
tracing: Avoid memory leak in process_system_preds()
2020-01-09 10:20:00 +01:00
tracing: Fix memory leaks in trace_events_hist.c
2020-05-10 10:31:28 +02:00
tracing: Fix event trigger to accept redundant spaces
2020-06-30 15:37:10 -04:00
fgraph: Remove redundant ftrace_graph_notrace_addr() test
2019-07-30 21:50:03 -04:00
tracing/hwlat: Honor the tracing_cpumask
2020-08-21 13:05:27 +02:00
tracing/probe: Fix bpf_task_fd_query() for kprobes and uprobes
2020-06-24 17:50:43 +02:00
tracing: Be more clever when dumping hex in __print_hex()
2019-09-17 11:21:28 -04:00
tracing: Add locked_down checks to the open calls of files created for tracefs
2019-10-12 20:48:06 -04:00
tracing/probe: Fix memleak in fetch_op_data operations
2020-06-24 17:50:51 +02:00
tracing/uprobe: Fix to make trace_uprobe_filter alignment safe
2020-02-05 21:22:53 +00:00
tracing: Fix sched switch start/stop refcount racy updates
2020-02-11 04:35:07 -08:00
kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail
2020-01-14 20:08:22 +01:00
tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
2020-01-14 20:08:22 +01:00
tracing: Fix very unlikely race of registering two stat tracers
2020-02-24 08:36:30 +01:00
tracing/probe: Fix bpf_task_fd_query() for kprobes and uprobes
2020-06-24 17:50:43 +02:00
tracing: Have the histogram compare functions convert to u64 first
2020-01-09 10:20:00 +01:00
43e172e31b