Steven Rostedt (Red Hat) 8b275b4522 tracing: Move mutex to protect against resetting of seq data ...

commit 1245800c0f96eb6ebb368593e251d66c01e61022 upstream.

The iter->seq can be reset outside the protection of the mutex. So can
reading of user data. Move the mutex up to the beginning of the function.

Fixes: d7350c3f45 ("tracing/core: make the read callbacks reentrants")
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2016-09-30 10:18:38 +02:00

..

blktrace.c

Merge tag 'trace-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2015-11-06 13:30:20 -08:00

bpf_trace.c

bpf: make tracing helpers gpl only

2015-10-26 21:53:34 -07:00

ftrace.c

Merge tag 'trace-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2015-11-06 13:30:20 -08:00

Kconfig

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

2015-11-10 18:11:41 -08:00

Makefile

Makefile: Mute warning for __builtin_return_address(>0) for tracing only

2016-09-30 10:18:35 +02:00

power-traces.c

PM / sleep: export suspend_resume trace event

2015-01-30 02:10:41 +01:00

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

ring-buffer: Prevent overflow of size in ring_buffer_resize()

2016-06-01 12:15:49 -07:00

rpm-traces.c

…

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

…

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: %pF is only for function pointers

2015-03-25 08:57:22 -04:00

trace_event_perf.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

trace_events_filter_test.h

…

trace_events_filter.c

tracing: Do not have 'comm' filter override event 'comm' field

2016-03-09 15:34:52 -08:00

trace_events_trigger.c

tracing: Rename ftrace_raw_##call event structures to trace_event_raw_##call

2015-05-13 21:48:40 -04:00

trace_events.c

tracing: Don't display trigger file for events that can't be enabled

2016-05-11 11:21:13 +02:00

trace_export.c

tracing: ftrace_event_is_function() can return boolean

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

trace_functions_graph.c

tracing: Remove unused ftrace_cpu_disabled per cpu variable

2015-11-07 13:25:14 -05:00

trace_functions.c

…

trace_irqsoff.c

tracing: Have preempt(irqs)off trace preempt disabled functions

2016-04-12 09:08:59 -07:00

trace_kdb.c

tracing: Move trace_flags from global to a trace_array field

2015-09-30 15:22:55 -04:00

trace_kprobe.c

lib: introduce strncpy_from_unsafe()

2015-08-28 16:27:27 -07:00

trace_mmiotrace.c

tracing: Pass trace_array into trace_buffer_unlock_commit()

2015-09-25 17:38:44 -04:00

trace_nop.c

tracing: Remove unneeded includes of debugfs.h and fs.h

2015-01-22 11:19:48 -05:00

trace_output.c

tracing: Move trace_flags from global to a trace_array field

2015-09-30 15:22:55 -04:00

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()

2016-07-27 09:47:32 -07:00

trace_probe.c

trace: Don't use __weak in header files

2015-03-25 08:57:23 -04:00

trace_probe.h

kernel/trace_probe: is_good_name can be boolean

2015-09-22 13:11:30 -04:00

trace_sched_switch.c

sched/core: Fix trace_sched_switch()

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

trace_sched_wakeup.c

Merge tag 'trace-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2015-11-06 13:30:20 -08:00

trace_selftest_dynamic.c

…

trace_selftest.c

…

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/stacktrace: Show entire trace if passed in function not found

2016-02-17 12:30:57 -08:00

trace_stat.c

tracing: Convert the tracing facility over to use tracefs

2015-02-03 12:48:41 -05:00

trace_stat.h

…

trace_syscalls.c

tracing: Move trace_flags from global to a trace_array field

2015-09-30 15:22:55 -04:00

trace_uprobe.c

tracing/uprobes: Do not print '0x (null)' when offset is 0

2015-08-26 10:43:01 -03:00

trace.c

tracing: Move mutex to protect against resetting of seq data

2016-09-30 10:18:38 +02:00

trace.h

tracing: Remove unused ftrace_cpu_disabled per cpu variable

2015-11-07 13:25:14 -05:00