Daniel Borkmann 5b6c1b4d46 bpf, trace: use READ_ONCE for retrieving file ptr ... In bpf_perf_event_read() and bpf_perf_event_output(), we must use READ_ONCE() for fetching the struct file pointer, which could get updated concurrently, so we must prevent the compiler from potential refetching. We already do this with tail calls for fetching the related bpf_prog, but not so on stored perf events. Semantics for both are the same with regards to updates. Fixes: a43eec3042 ("bpf: introduce bpf_perf_event_output() helper") Fixes: 35578d7984 ("bpf: Implement function bpf_perf_event_read() that get the selected hardware PMU conuter") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-06-07 14:48:03 -07:00
..
blktrace.c	blktrace: add missed mask name	2016-05-10 08:41:36 -06:00
bpf_trace.c	bpf, trace: use READ_ONCE for retrieving file ptr	2016-06-07 14:48:03 -07:00
ftrace.c	Three more changes.	2016-05-22 19:40:39 -07:00
Kconfig	tracing: Add 'hist' event trigger command	2016-04-19 12:16:14 -04:00
Makefile	tracing: Add 'hist' event trigger command	2016-04-19 12:16:14 -04:00
power-traces.c
ring_buffer.c	ring-buffer: Prevent overflow of size in ring_buffer_resize()	2016-05-13 16:44:20 -04:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c	tracing: Use temp buffer when filtering events	2016-05-03 17:59:24 -04:00
trace.h	tracing: Use temp buffer when filtering events	2016-05-03 17:59:24 -04:00
trace_benchmark.c
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_entries.h
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.c	This includes two new updates for the ftrace infrastructure.	2016-05-18 18:55:19 -07:00
trace_events_filter.c	tracing: Use temp buffer when filtering events	2016-05-03 17:59:24 -04:00
trace_events_filter_test.h
trace_events_hist.c	tracing: Add check for NULL event field when creating hist field	2016-04-26 09:40:29 -04:00
trace_events_trigger.c	tracing: Add support for named triggers	2016-04-19 18:56:00 -04:00
trace_export.c
trace_functions.c
trace_functions_graph.c
trace_irqsoff.c
trace_kdb.c
trace_kprobe.c
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_printk.c
trace_probe.c
trace_probe.h
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest.c
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_syscalls.c
trace_uprobe.c
tracing_map.c	tracing: Handle tracing_map_alloc_elts() error path correctly	2016-04-26 09:40:30 -04:00
tracing_map.h	tracing: Update some tracing_map constants and comments	2016-04-19 12:16:06 -04:00