Gaurav Kohli 089178161f tracing: Fix race in trace_open and buffer resize call ...

commit bbeb97464e upstream.

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: 83f40318da ("ring-buffer: Make removal of ring buffer pages atomic")
Reported-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Gaurav Kohli <gkohli@codeaurora.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-05-16 10:32:58 +09:00

..

blktrace.c

blktrace: break out of blktrace setup on concurrent calls

2023-05-16 08:21:50 +09:00

bpf_trace.c

bpf: fix check of allowed specifiers in bpf_trace_printk

2023-05-15 10:31:16 +09:00

ftrace.c

ftrace: Fix updating FTRACE_FL_TRAMP

2023-05-16 09:51:28 +09:00

gpu-traces.c

ANDROID: trace/events: add gpu trace events

2017-01-27 13:51:39 -08:00

Kconfig

Stop the ad-hoc games with -Wno-maybe-initialized

2023-05-12 16:26:08 +09:00

Makefile

FROMLIST: tracing: Add support for preempt and irq enable/disable events

2017-10-06 16:20:25 -07:00

power-traces.c

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

ring_buffer_benchmark.c

ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark

2015-11-03 16:19:02 -05:00

ring_buffer.c

tracing: Fix race in trace_open and buffer resize call

2023-05-16 10:32:58 +09:00

rpm-traces.c

PM / Runtime: Introduce trace points for tracing rpm_* functions

2011-09-27 22:53:27 +02:00

trace_benchmark.c

tracing: Only benchmark the time tracepoints take if tracing is on

2015-11-02 13:34:58 -05:00

trace_benchmark.h

tracing: Add tracepoint benchmark tracepoint

2014-05-29 22:49:54 -04:00

trace_branch.c

tracing: Remove {start,stop}_branch_trace

2015-10-21 10:10:09 -04:00

trace_clock.c

tracing: Export tracing clock functions

2015-05-12 15:56:57 -04:00

trace_entries.h

tracing: Set kernel_stack's caller size properly

2023-05-16 09:15:20 +09:00

trace_event_perf.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-05-17 16:26:30 -07:00

trace_events_filter_test.h

tracing/filter: Add startup tests for events filter

2011-08-19 14:35:59 -04:00

trace_events_filter.c

tracing: Fix regex_match_front() to not over compare the test string

2018-05-16 10:08:43 +02:00

trace_events_hist.c

tracing: Use strncpy instead of memcpy for string keys in hist triggers

2023-05-15 12:05:48 +09:00

trace_events_trigger.c

tracing: Fix event trigger to accept redundant spaces

2023-05-16 08:22:02 +09:00

trace_events.c

tracing: Adding NULL checks for trace_array descriptor pointer

2023-05-16 09:15:00 +09:00

trace_export.c

tracing: ftrace_event_is_function() can return boolean

2015-11-02 14:28:05 -05:00

trace_functions_graph.c

Merge 4.9.112 into android-4.9

2018-07-11 16:40:16 +02:00

trace_functions.c

ftrace: Have set_ftrace_pid use the bitmap like events do

2016-06-20 09:54:19 -04:00

trace_hwlat.c

tracing/hwlat: Honor the tracing_cpumask

2023-05-16 08:54:33 +09:00

trace_irqsoff.c

FROMLIST: tracing: Add support for preempt and irq enable/disable events

2017-10-06 16:20:25 -07:00

trace_kdb.c

tracing: Silence GCC 9 array bounds warning

2023-05-15 13:54:34 +09:00

trace_kprobe.c

tracing: Quiet gcc warning about maybe unused link variable

2023-05-12 16:39:00 +09:00

trace_mmiotrace.c

tracing: Expose CPU physical addresses (resource values) for PCI devices

2016-06-20 09:54:22 -04:00

trace_nop.c

tracing: Fix typoes in code comment and printk in trace_nop.c

2016-03-08 11:23:57 -05:00

trace_output.c

ANDROID: trace: fix compilation for 4.1

2017-01-27 13:51:42 -08:00

trace_output.h

tracing: Turn seq_print_user_ip() into a static function

2015-09-28 10:16:12 -04:00

trace_printk.c

tracing: Handle NULL formats in hold_module_trace_bprintk_format()

2016-06-20 09:46:12 -04:00

trace_probe.c

tracing: probeevent: Fix to support minus offset from symbol

2018-03-28 18:39:23 +02:00

trace_probe.h

tracing: probeevent: Fix to support minus offset from symbol

2018-03-28 18:39:23 +02:00

trace_sched_switch.c

sched/core: Fix trace_sched_switch()

2015-10-06 17:08:15 +02:00

trace_sched_wakeup.c

kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail

2023-05-15 16:33:02 +09:00

trace_selftest_dynamic.c

ftrace: Add self-tests for multiple function trace users

2011-05-18 19:24:51 -04:00

trace_selftest.c

ftrace: Handle tracing when switching between context

2023-05-16 09:46:07 +09:00

trace_seq.c

tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

trace_stack.c

tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined

2023-05-15 16:33:03 +09:00

trace_stat.c

tracing: Fix very unlikely race of registering two stat tracers

2023-05-15 16:58:23 +09:00

trace_stat.h

tracing/stat: Add stat_release() callback

2009-07-10 12:14:05 +02:00

trace_syscalls.c

tracing/syscalls: fix multiline in error message text

2016-09-29 10:25:23 +02:00

trace_uprobe.c

tracing/uprobes: Fix output for multiple string arguments

2023-05-15 11:34:35 +09:00

trace.c

tracing: Fix userstacktrace option for instances

2023-05-16 09:51:37 +09:00

trace.h

tracing: Fix userstacktrace option for instances

2023-05-16 09:51:37 +09:00

tracing_map.c

tracing: Have the histogram compare functions convert to u64 first

2023-05-15 16:30:35 +09:00

tracing_map.h

tracing: Update some tracing_map constants and comments

2016-04-19 12:16:06 -04:00