Steven Rostedt (VMware) 1f9b3546cf tracing: Have traceprobe_probes_write() not access userspace unnecessarily ... The code in traceprobe_probes_write() reads up to 4096 bytes from userpace for each line. If userspace passes in several lines to execute, the code will do a large read for each line, even though, it is highly likely that the first read from userspace received all of the lines at once. I changed the logic to do a single read from userspace, and to only read from userspace again if not all of the read from userspace made it in. I tested this by adding printk()s and writing files that would test -1, ==, and +1 the buffer size, to make sure that there's no overflows and that if a single line is written with +1 the buffer size, that it fails properly. Link: http://lkml.kernel.org/r/20170209180458.5c829ab2@gandalf.local.home Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2017-02-15 09:00:55 -05:00
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blktrace.c	block: better op and flags encoding	2016-10-28 08:48:16 -06:00
bpf_trace.c	bpf: add helper for retrieving current numa node id	2016-10-22 17:05:52 -04:00
ftrace.c	ftrace: Have set_graph_function handle multiple functions in one write	2017-02-03 10:59:52 -05:00
Kconfig	ftrace: Support full glob matching	2016-11-14 16:42:58 -05:00
Makefile	Disable the __builtin_return_address() warning globally after all	2016-10-12 10:23:41 -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.c	This release has a few updates:	2016-12-15 13:49:34 -08:00
rpm-traces.c
trace_benchmark.c	tracing: Allow benchmark to be enabled at early_initcall()	2016-12-09 09:16:15 -05:00
trace_benchmark.h	tracing: Have the reg function allow to fail	2016-12-09 09:13:30 -05:00
trace_branch.c	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
trace_clock.c
trace_entries.h	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
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
trace_events_filter.c	tracing/filter: Define op as the enum that it is	2016-11-14 16:42:59 -05:00
trace_events_hist.c	tracing: Fix use-after-free in hist_register_trigger()	2016-08-02 15:16:30 -04:00
trace_events_trigger.c	tracing: Call traceoff trigger after event is recorded	2016-09-23 09:47:59 -04:00
trace_events.c	tracing: Have system enable return error if one of the events fail	2016-12-09 09:15:41 -05:00
trace_export.c
trace_functions_graph.c	tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too	2016-12-09 09:21:35 -05:00
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: Make __buffer_unlock_commit() always_inline	2016-11-23 20:30:51 -05:00
trace_irqsoff.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_kdb.c
trace_kprobe.c	kprobes/trace: Fix kprobe selftest for newer gcc	2016-12-12 21:21:43 -05:00
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	tracing: Add new trace_marker_raw	2016-11-15 15:13:59 -05:00
trace_output.h
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: Have traceprobe_probes_write() not access userspace unnecessarily	2017-02-15 09:00:55 -05:00
trace_probe.h	ftrace: kprobe: uprobe: Show u8/u16/u32/u64 types in decimal	2016-08-23 17:06:38 -03:00
trace_sched_switch.c
trace_sched_wakeup.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_selftest_dynamic.c
trace_selftest.c
trace_seq.c
trace_stack.c
trace_stat.c	kernel/...: convert pr_warning to pr_warn	2016-03-22 15:36:02 -07:00
trace_stat.h
trace_syscalls.c	tracing/syscalls: fix multiline in error message text	2016-09-29 10:25:23 +02:00
trace_uprobe.c	uprobe: Find last occurrence of ':' when parsing uprobe PATH:OFFSET	2017-01-17 12:57:47 -05:00
trace.c	tracing: Reset parser->buffer to allow multiple "puts"	2017-02-03 10:59:31 -05:00
trace.h	tracing: Have COMM event filter key be treated as a string	2017-02-10 14:19:45 -05:00
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