Jiri Olsa f70986902c bpf: Fix kprobe_multi return probe backtrace ... Andrii reported that backtraces from kprobe_multi program attached as return probes are not complete and showing just initial entry [1]. It's caused by changing registers to have original function ip address as instruction pointer even for return probe, which will screw backtrace from return probe. This change keeps registers intact and store original entry ip and link address on the stack in bpf_kprobe_multi_run_ctx struct, where bpf_get_func_ip and bpf_get_attach_cookie helpers for kprobe_multi programs can find it. [1] https://lore.kernel.org/bpf/CAEf4BzZDDqK24rSKwXNp7XL3ErGD4bZa1M6c_c4EvDSt3jrZcg@mail.gmail.com/T/#m8d1301c0ea0892ddf9dc6fba57a57b8cf11b8c51 Fixes: ca74823c6e ("bpf: Add cookie support to programs attached with kprobe multi link") Reported-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220321070113.1449167-3-jolsa@kernel.org		2022-03-21 14:54:15 +01:00
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blktrace.c	blktrace: switch trace spinlock to a raw spinlock	2021-12-20 13:50:14 -07:00
bpf_trace.c	bpf: Fix kprobe_multi return probe backtrace	2022-03-21 14:54:15 +01:00
bpf_trace.h
error_report-traces.c	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
fgraph.c	x86/ftrace: Make function graph use ftrace directly	2021-10-20 23:44:43 -04:00
fprobe.c	fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe	2022-03-17 20:17:02 -07:00
ftrace_internal.h
ftrace.c	ftrace: Add ftrace_set_filter_ips function	2022-03-17 20:15:17 -07:00
Kconfig	fprobe: Add exit_handler support	2022-03-17 20:16:52 -07:00
kprobe_event_gen_test.c
Makefile	rethook: Add a generic return hook	2022-03-17 20:16:29 -07:00
pid_list.c	tracing: Initialize upper and lower vars in pid_list_refill_irq()	2021-10-07 09:56:38 -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: Add a generic return hook	2022-03-17 20:16:29 -07:00
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: make use of the helper function kthread_run_on_cpu()	2022-01-15 16:30:23 +02:00
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: Fix missing trace_boot_init_histograms kstrdup NULL checks	2021-10-26 09:18:10 -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: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -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	eprobes: Remove redundant event type information	2022-02-25 12:07:01 -05:00
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: Add ustring operation to filtering string pointers	2022-01-14 03:42:24 -05:00
trace_events_hist.c	tracing: Propagate is_signed to expression	2022-01-27 19:15:49 -05:00
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 updates for 5.17:	2022-01-16 10:15:32 +02:00
trace_events_trigger.c	tracing: Uninline trace_trigger_soft_disabled() partly	2022-02-25 12:07:01 -05:00
trace_events.c	tracing: Remove duplicate warnings when calling trace_create_file()	2022-01-13 17:02:42 -05:00
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 updates for 5.17:	2022-01-16 10:15:32 +02:00
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/osnoise: Make osnoise_main to sleep for microseconds	2022-02-25 12:07:01 -05:00
trace_output.c	tracing: Account bottom half disabled sections.	2022-01-13 16:23:04 -05:00
trace_output.h	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
trace_preemptirq.c	lockdep: fix order in trace_hardirqs_off_caller()	2020-09-14 10:08:07 +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: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_sched_switch.c
trace_sched_wakeup.c	tracing: Change variable type as bool for clean-up	2021-06-30 09:19:14 -04:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Fix selftest config check for function graph start up test	2022-02-25 21:05:29 -05:00
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: Have syscall trace events use trace_event_buffer_lock_reserve()	2022-01-13 16:23:05 -05:00
trace_uprobe.c	Tracing updates for 5.17:	2022-01-16 10:15:32 +02:00
trace.c	tracing: Ensure trace buffer is at least 4096 bytes large	2022-02-25 12:07:01 -05:00
trace.h	eprobes: Remove redundant event type information	2022-02-25 12:07:01 -05:00
tracing_map.c	tracing: Fix a kmemleak false positive in tracing_map	2021-12-01 21:04:34 -05:00
tracing_map.h	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00