Masami Hiramatsu (Google) c0f3bb4054 rethook: Reject getting a rethook if RCU is not watching ... Since the rethook_recycle() will involve the call_rcu() for reclaiming the rethook_instance, the rethook must be set up at the RCU available context (non idle). This rethook_recycle() in the rethook trampoline handler is inevitable, thus the RCU available check must be done before setting the rethook trampoline. This adds a rcu_is_watching() check in the rethook_try_get() so that it will return NULL if it is called when !rcu_is_watching(). Fixes: 54ecbe6f1e ("rethook: Add a generic return hook") Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/165461827269.280167.7379263615545598958.stgit@devnote2		2022-06-17 21:53:35 +02:00
..
blktrace.c	blk-cgroup: replace bio_blkcg with bio_blkcg_css	2022-05-02 14:06:20 -06:00
bpf_trace.c	bpf: Force cookies array to follow symbols sorting	2022-06-16 19:42:21 -07:00
bpf_trace.h
error_report-traces.c	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
fgraph.c	arm64 fixes for 5.19-rc1:	2022-06-03 14:05:34 -07:00
fprobe.c	fprobe: Resolve symbols with ftrace_lookup_symbols	2022-05-10 14:42:06 -07:00
ftrace_internal.h
ftrace.c	ftrace: Keep address offset in ftrace_lookup_symbols	2022-06-16 19:42:21 -07:00
Kconfig	Objtool changes for this cycle were:	2022-05-24 10:36:38 -07:00
kprobe_event_gen_test.c
Makefile	tracing: Disable kcov on trace_preemptirq.c	2022-05-26 21:13:00 -04:00
pid_list.c	tracing: Cleanup double word in comment	2022-04-26 17:58:50 -04:00
pid_list.h	tracing: Create a sparse bitmask for pid filtering	2021-10-05 17:38:45 -04:00
power-traces.c
preemptirq_delay_test.c	kernel: trace: preemptirq_delay_test: add cpu affinity	2021-02-02 17:02:07 -05:00
rethook.c	rethook: Reject getting a rethook if RCU is not watching	2022-06-17 21:53:35 +02:00
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: Have 32 bit time stamps use all 64 bits	2022-04-27 17:19:30 -04:00
rpm-traces.c
synth_event_gen_test.c	tracing: Fix various typos in comments	2021-03-23 14:08:18 -04:00
trace_benchmark.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_benchmark.h
trace_boot.c	tracing: Initialize integer variable to prevent garbage return value	2022-05-26 21:13:00 -04:00
trace_branch.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_clock.c	tracing: Do no increment trace_clock_global() by one	2021-06-18 09:10:00 -04:00
trace_dynevent.c	tracing: Use trace_create_file() to simplify creation of tracefs entries	2022-05-26 21:12:52 -04:00
trace_dynevent.h	tracing: Add DYNAMIC flag for dynamic events	2021-08-18 18:10:32 -04:00
trace_entries.h	trace: Add timerlat tracer	2021-06-25 19:57:24 -04:00
trace_eprobe.c	tracing: Remove check of list iterator against head past the loop body	2022-04-27 17:19:31 -04:00
trace_event_perf.c	tracing: Show size of requested perf buffer	2021-10-27 12:25:09 -04:00
trace_events_filter_test.h
trace_events_filter.c	tracing: Fix comments of create_filter()	2022-05-26 21:13:01 -04:00
trace_events_hist.c	tracing: Change "char *" string form to "char []"	2022-05-26 21:13:00 -04:00
trace_events_inject.c	tracing: Support __rel_loc relative dynamic data location attribute	2021-12-06 15:37:21 -05:00
trace_events_synth.c	tracing: Fix strncpy warning in trace_events_synth.c	2022-03-11 11:49:24 -05:00
trace_events_trigger.c	tracing: Fix comments for event_trigger_separate_filter()	2022-05-26 22:03:52 -04:00
trace_events_user.c	tracing: mark user_events as BROKEN	2022-04-02 10:32:14 -07:00
trace_events.c	tracing updates for 5.19:	2022-05-29 10:31:36 -07:00
trace_export.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_functions_graph.c	tracing: in_irq() cleanup	2021-10-13 18:19:41 -04:00
trace_functions.c	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
trace_hwlat.c	trace/hwlat: make use of the helper function kthread_run_on_cpu()	2022-01-15 16:30:24 +02:00
trace_irqsoff.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_kdb.c	kdb: Rename members of struct kdbtab_t	2021-07-27 17:05:06 +01:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	tracing: Use trace_create_file() to simplify creation of tracefs entries	2022-05-26 21:12:52 -04:00
trace_mmiotrace.c	tracing: Remove definition of DEBUG in trace_mmiotrace.c	2021-02-02 17:02:07 -05:00
trace_nop.c
trace_osnoise.c	tracing updates for 5.19:	2022-05-29 10:31:36 -07:00
trace_output.c	tracing: Remove usage of list iterator after the loop body	2022-04-27 17:19:30 -04:00
trace_output.h	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
trace_preemptirq.c	lockdep: Fix -Wunused-parameter for _THIS_IP_	2022-04-05 10:24:34 +02:00
trace_printk.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_probe_tmpl.h	tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs	2021-08-19 09:09:03 -04:00
trace_probe.c	eprobes: Remove redundant event type information	2022-02-25 12:07:01 -05:00
trace_probe.h	eprobes: Remove redundant event type information	2022-02-25 12:07:01 -05:00
trace_recursion_record.c	tracing: Use trace_create_file() to simplify creation of tracefs entries	2022-05-26 21:12:52 -04:00
trace_sched_switch.c	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
trace_sched_wakeup.c	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Reset the function filter after completing trampoline/graph selftest	2022-05-25 16:57:37 -04:00
trace_seq.c	tracing: Fix various typos in comments	2021-03-23 14:08:18 -04:00
trace_stack.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_stat.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_stat.h
trace_synth.h	tracing: synth events: increase max fields count	2021-09-08 15:29:16 -04:00
trace_syscalls.c	tracing: Make tp_printk work on syscall tracepoints	2022-04-26 17:58:52 -04:00
trace_uprobe.c	Tracing updates for 5.17:	2022-01-16 10:15:32 +02:00
trace.c	tracing updates for 5.19:	2022-05-29 10:31:36 -07:00
trace.h	tracing: Have existing event_command.parse() implementations use helpers	2022-04-26 17:58:50 -04:00
tracing_map.c	tracing: Fix tracing_map_sort_entries() kernel-doc comment	2022-04-26 17:58:51 -04:00
tracing_map.h	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00