Gaurav Kohli bbeb97464e tracing: Fix race in trace_open and buffer resize call ... Below race can come, if trace_open and resize of cpu buffer is running parallely on different cpus CPUX CPUY ring_buffer_resize atomic_read(&buffer->resize_disabled) tracing_open tracing_reset_online_cpus ring_buffer_reset_cpu rb_reset_cpu rb_update_pages remove/insert pages resetting pointer This race can cause data abort or some times infinte loop in rb_remove_pages and rb_insert_pages while checking pages for sanity. Take buffer lock to fix this. Link: https://lkml.kernel.org/r/1601976833-24377-1-git-send-email-gkohli@codeaurora.org Cc: stable@vger.kernel.org Fixes: b23d7a5f4a ("ring-buffer: speed up buffer resets by avoiding synchronize_rcu for each CPU") Signed-off-by: Gaurav Kohli <gkohli@codeaurora.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2020-10-15 12:01:13 -04:00
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Kconfig	Tracing updates for 5.8:	2020-06-09 10:06:18 -07:00
Makefile	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
blktrace.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
bpf_trace.c	bpf: Remove inline from bpf_do_trace_printk	2020-08-06 16:53:17 -07:00
bpf_trace.h	bpf: Use dedicated bpf_trace_printk event instead of trace_printk()	2020-07-13 16:55:49 -07:00
fgraph.c	fgraph: Convert ret_stack tasklist scanning to rcu	2020-09-21 21:06:02 -04:00
ftrace.c	ftrace: Format variable declarations of ftrace_allocate_records	2020-10-08 15:29:06 -04:00
ftrace_internal.h	x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up	2020-05-12 18:24:34 -04:00
kprobe_event_gen_test.c	tracing: Add kprobe event command generation test module	2020-01-30 09:46:28 -05:00
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: Wait for preempt irq delay thread to execute	2020-05-11 17:00:34 -04:00
ring_buffer.c	tracing: Fix race in trace_open and buffer resize call	2020-10-15 12:01:13 -04:00
ring_buffer_benchmark.c	sched,tracing: Convert to sched_set_fifo()	2020-07-29 11:43:53 +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
synth_event_gen_test.c	tracing: Add support for dynamic strings to synthetic events	2020-10-05 19:32:18 -04:00
trace.c	tracing: Remove a pointless assignment	2020-10-08 15:29:06 -04:00
trace.h	tracing/boot: Initialize per-instance event list in early boot	2020-09-25 15:36:03 -04:00
trace_benchmark.c	trace: Use pr_warn instead of pr_warning	2019-10-18 15:01:57 +02:00
trace_benchmark.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_boot.c	tracing/boot, kprobe, synth: Initialize boot-time tracing earlier	2020-09-21 21:06:04 -04:00
trace_branch.c	tracing: Make struct ring_buffer less ambiguous	2020-01-13 13:19:38 -05:00
trace_clock.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_dynevent.c	tracing: Delete repeated words in comments	2020-09-21 21:06:02 -04:00
trace_dynevent.h	tracing: Remove check_arg() callbacks from dynevent args	2020-02-01 13:09:23 -05:00
trace_entries.h	tracing: Make ftrace packed events have align of 1	2020-06-16 21:21:02 -04:00
trace_event_perf.c	Merge branch 'perf/urgent' into perf/core, to pick up fixes	2019-10-28 12:38:26 +01:00
trace_events.c	tracing/boot: Initialize per-instance event list in early boot	2020-09-25 15:36:03 -04:00
trace_events_filter.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
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_hist.c	tracing: Check return value of __create_val_fields() before using its result	2020-10-15 12:00:59 -04:00
trace_events_inject.c	tracing: Initialize val to zero in parse_entry of inject code	2020-01-02 19:04:57 -05:00
trace_events_synth.c	tracing: Fix synthetic print fmt check for use of __get_str()	2020-10-08 15:29:07 -04:00
trace_events_trigger.c	tracing: Fix event trigger to accept redundant spaces	2020-06-23 21:51:40 -04:00
trace_export.c	tracing: Make ftrace packed events have align of 1	2020-06-16 21:21:02 -04:00
trace_functions.c	tracing: Enable creating new instance early boot	2020-09-21 21:06:04 -04:00
trace_functions_graph.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_hwlat.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_irqsoff.c	tracing: Rename trace_buffer to array_buffer	2020-01-13 13:19:38 -05:00
trace_kdb.c	tracing: Rename trace_buffer to array_buffer	2020-01-13 13:19:38 -05:00
trace_kprobe.c	tracing/boot, kprobe, synth: Initialize boot-time tracing earlier	2020-09-21 21:06:04 -04:00
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_mmiotrace.c	tracing: Make struct ring_buffer less ambiguous	2020-01-13 13:19:38 -05:00
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: Make the space reserved for the pid wider	2020-09-18 12:42:11 -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	x86/entry: Rename trace_hardirqs_off_prepare()	2020-06-11 15:15:24 +02:00
trace_printk.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_probe.c	tracing/probe: Fix memleak in fetch_op_data operations	2020-06-16 21:21:02 -04:00
trace_probe.h	tracing/kprobes: Support perf-style return probe	2020-09-21 21:06:03 -04:00
trace_probe_tmpl.h	tracing/probe: Support user-space dereference	2019-05-25 23:04:42 -04:00
trace_sched_switch.c	tracing: Fix sched switch start/stop refcount racy updates	2020-01-30 09:46:10 -05:00
trace_sched_wakeup.c	tracing: Make struct ring_buffer less ambiguous	2020-01-13 13:19:38 -05:00
trace_selftest.c	tracing: Rename trace_buffer to array_buffer	2020-01-13 13:19:38 -05:00
trace_selftest_dynamic.c	ftrace: Mark function tracer test functions noinline/noclone	2018-01-23 15:57:29 -05:00
trace_seq.c	tracing: Remove unused TRACE_SEQ_BUF_USED	2020-01-21 18:39:54 -05:00
trace_stack.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_stat.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_stat.h	tracing: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
trace_synth.h	tracing: Add support for dynamic strings to synthetic events	2020-10-05 19:32:18 -04:00
trace_syscalls.c	Tracing updates:	2020-02-06 07:12:11 +00:00
trace_uprobe.c	tracing/uprobes: Support perf-style return probe	2020-09-21 21:06:03 -04:00
tracing_map.c	tracing: Delete repeated words in comments	2020-09-21 21:06:02 -04:00
tracing_map.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00