Daniel Borkmann 9c481b908b bpf: fix bpf_prog_array_copy_to_user warning from perf event prog query ... syzkaller tried to perform a prog query in perf_event_query_prog_array() where struct perf_event_query_bpf had an ids_len of 1,073,741,353 and thus causing a warning due to failed kcalloc() allocation out of the bpf_prog_array_copy_to_user() helper. Given we cannot attach more than 64 programs to a perf event, there's no point in allowing huge ids_len. Therefore, allow a buffer that would fix the maximum number of ids and also add a __GFP_NOWARN to the temporary ids buffer. Fixes: f371b304f1 ("bpf/tracing: allow user space to query prog array on the same tp") Fixes: 0911287ce3 ("bpf: fix bpf_prog_array_copy_to_user() issues") Reported-by: syzbot+cab5816b0edbabf598b3@syzkaller.appspotmail.com Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2018-02-14 08:59:37 -08:00
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Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-01-17 00:10:42 -05:00
Makefile	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
blktrace.c	blktrace: fix trace mutex deadlock	2017-11-27 12:03:58 -07:00
bpf_trace.c	bpf: fix bpf_prog_array_copy_to_user warning from perf event prog query	2018-02-14 08:59:37 -08:00
ftrace.c	ftrace: Remove incorrect setting of glob search field	2018-02-08 10:11:11 -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
ring_buffer.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
ring_buffer_benchmark.c	ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU	2017-08-02 14:23:02 -04:00
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
trace.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
trace.h	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
trace_benchmark.c	trace: Eliminate cond_resched_rcu_qs() in favor of cond_resched()	2017-12-04 10:28:58 -08:00
trace_benchmark.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_branch.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_clock.c	…
trace_entries.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_event_perf.c	perf/ftrace: Small cleanup	2017-10-16 18:13:28 -04:00
trace_events.c	tracing: Make sure the parsed string always terminates with '\0'	2018-01-23 15:57:28 -05:00
trace_events_filter.c	tracing: Fix parsing of globs with a wildcard at the beginning	2018-02-08 10:11:47 -05:00
trace_events_filter_test.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_events_hist.c	tracing: Reimplement log2	2017-10-04 13:10:39 -04:00
trace_events_trigger.c	tracing: Update stack trace skipping for ORC unwinder	2018-01-23 15:57:00 -05:00
trace_export.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_functions.c	tracing: Update stack trace skipping for ORC unwinder	2018-01-23 15:57:00 -05:00
trace_functions_graph.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_hwlat.c	…
trace_irqsoff.c	tracing: Add support for preempt and irq enable/disable events	2017-10-10 18:58:43 -04:00
trace_kdb.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_kprobe.c	error-injection: Separate error-injection from kprobe	2018-01-12 17:33:38 -08:00
trace_mmiotrace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	sched/debug: Rename task-state printing helpers	2017-10-10 11:43:29 +02:00
trace_output.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_printk.c	…
trace_probe.c	tracing: Make traceprobe parsing code reusable	2017-10-04 13:06:44 -04:00
trace_probe.h	tracing/kprobe: bpf: Check error injectable event is on function entry	2018-01-12 17:33:37 -08:00
trace_sched_switch.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_sched_wakeup.c	Merge branch 'linus' into sched/core, to pick up fixes	2017-11-08 10:17:15 +01:00
trace_selftest.c	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
trace_selftest_dynamic.c	ftrace: Mark function tracer test functions noinline/noclone	2018-01-23 15:57:29 -05:00
trace_seq.c	…
trace_stack.c	tracing: Have stack trace not record if RCU is not watching	2017-12-14 20:48:22 -05:00
trace_stat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_stat.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_syscalls.c	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
trace_uprobe.c	trace_uprobe: Display correct offset in uprobe_events	2018-01-23 15:57:29 -05:00
tracing_map.c	tracing: Remove lookups from tracing_map hitcount	2017-10-04 13:05:42 -04:00
tracing_map.h	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00