Kamal Agrawal 0671bafa24 UPSTREAM: tracing: Fix NULL pointer dereference in start_creating ... The event_trace_add_tracer() can fail. In this case, it leads to a crash in start_creating with below call stack. Handle the error scenario properly in trace_array_create_dir. Call trace: down_write+0x7c/0x204 start_creating.25017+0x6c/0x194 tracefs_create_file+0xc4/0x2b4 init_tracer_tracefs+0x5c/0x940 trace_array_create_dir+0x58/0xb4 trace_array_create+0x1bc/0x2b8 trace_array_get_by_name+0xdc/0x18c Link: https://lkml.kernel.org/r/1627651386-21315-1-git-send-email-kamaagra@codeaurora.org Cc: stable@vger.kernel.org Fixes: 4114fbfd02 ("tracing: Enable creating new instance early boot") Signed-off-by: Kamal Agrawal <kamaagra@codeaurora.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Bug: 200485226 Change-Id: I79946d9bfc3ffd129bbb1e5fa6460ec0a51f8e59 (cherry picked from commit ff41c28c4b) Signed-off-by: Kamal Agrawal <kamaagra@codeaurora.org>		2021-09-20 19:02:31 +05:30
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blktrace.c	block: add a bdget_part helper	2020-10-05 10:38:33 -06:00
bpf_trace.c	bpf, lockdown, audit: Fix buggy SELinux lockdown permission checks	2021-06-10 13:39:19 +02:00
bpf_trace.h
error_report-traces.c	FROMGIT: tracing: add error_report_end trace point	2021-02-05 09:20:54 -08:00
fgraph.c	fgraph: Initialize tracing_graph_pause at task creation	2021-02-10 09:29:16 +01:00
ftrace_internal.h
ftrace.c	ftrace: Handle commands when closing set_ftrace_filter file	2021-05-11 14:47:12 +02:00
Kconfig	ANDROID: tracing: Make automounting in debugfs optional	2021-04-06 13:01:51 +00:00
kprobe_event_gen_test.c
Makefile	FROMGIT: tracing: add error_report_end trace point	2021-02-05 09:20:54 -08:00
power-traces.c	ANDROID: sched: cpufreq_schedutil: move sugov traces to sched	2021-01-12 12:57:37 -08:00
preemptirq_delay_test.c
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: Force before_stamp and write_stamp to be different on discard	2021-03-09 11:11:12 +01:00
rpm-traces.c
synth_event_gen_test.c	tracing: Add support for dynamic strings to synthetic events	2020-10-05 19:32:18 -04:00
trace_benchmark.c
trace_benchmark.h
trace_boot.c	tracing: Disable ftrace selftests when any tracer is running	2020-12-30 11:54:28 +01:00
trace_branch.c
trace_clock.c	tracing: Restructure trace_clock_global() to never block	2021-05-11 14:47:40 +02:00
trace_dynevent.c
trace_dynevent.h
trace_entries.h
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c	tracing: Check return value of __create_val_fields() before using its result	2020-10-15 12:00:59 -04:00
trace_events_inject.c
trace_events_synth.c	tracing: Make -ENOMEM the default error for parse_synth_field()	2020-11-02 15:58:32 -05:00
trace_events_trigger.c
trace_events.c	tracing: Do not count ftrace events in top level enable output	2021-02-17 11:02:20 +01:00
trace_export.c	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
trace_functions_graph.c
trace_functions.c
trace_hwlat.c	tracing: Remove WARN_ON in start_thread()	2020-11-30 21:43:07 -05:00
trace_irqsoff.c	tracing: Use pause-on-trace with the latency tracers	2021-02-10 09:29:16 +01:00
trace_kdb.c
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	tracing/kprobe: Fix to support kretprobe events on unloaded modules	2021-02-10 09:29:16 +01:00
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_preemptirq.c	ANDROID: tracing: Add restricted vendor hooks for preemptirq events	2020-12-03 17:44:38 +00:00
trace_printk.c	Updates for tracing and bootconfig:	2020-10-15 15:51:28 -07:00
trace_probe_tmpl.h
trace_probe.c
trace_probe.h	tracing: Move is_good_name() from trace_probe.h to trace.h	2020-10-15 12:01:13 -04:00
trace_readwrite.c	ANDROID: tracing: Add register read and write tracing support	2021-01-11 16:43:50 +00:00
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest_dynamic.c
trace_selftest.c	tracing: Disable ftrace selftests when any tracer is running	2020-12-30 11:54:28 +01:00
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_synth.h	tracing: Add support for dynamic strings to synthetic events	2020-10-05 19:32:18 -04:00
trace_syscalls.c
trace_uprobe.c
trace.c	UPSTREAM: tracing: Fix NULL pointer dereference in start_creating	2021-09-20 19:02:31 +05:30
trace.h	tracing: Disable ftrace selftests when any tracer is running	2020-12-30 11:54:28 +01:00
tracing_map.c
tracing_map.h