OpenCloudOS-Kernel/kernel/trace
Steven Rostedt (Google) d5f30a7da8 tracing: Fix race where eprobes can be called before the event
The flag that tells the event to call its triggers after reading the event
is set for eprobes after the eprobe is enabled. This leads to a race where
the eprobe may be triggered at the beginning of the event where the record
information is NULL. The eprobe then dereferences the NULL record causing
a NULL kernel pointer bug.

Test for a NULL record to keep this from happening.

Link: https://lore.kernel.org/linux-trace-kernel/20221116192552.1066630-1-rafaelmendsr@gmail.com/
Link: https://lore.kernel.org/all/20221117214249.2addbe10@gandalf.local.home/

Cc: stable@vger.kernel.org
Fixes: 7491e2c442 ("tracing: Add a probe that attaches to trace events")
Reported-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
2022-11-24 00:42:18 +09:00
..
rv rv/monitor: Add __init/__exit annotations to module init/exit funcs 2022-09-26 18:10:51 -04:00
Kconfig ftrace: Add HAVE_DYNAMIC_FTRACE_NO_PATCHABLE 2022-09-16 22:16:48 +02:00
Makefile rv: Add Runtime Verification (RV) interface 2022-07-30 14:01:28 -04:00
blktrace.c blktrace: remove unnessary stop block trace in 'blk_trace_shutdown' 2022-10-20 06:02:52 -07:00
bpf_trace.c bpf: Fix sample_flags for bpf_perf_event_output 2022-10-17 16:32:06 +02:00
bpf_trace.h
error_report-traces.c
fgraph.c arm64 fixes for 5.19-rc1: 2022-06-03 14:05:34 -07:00
fprobe.c tracing/fprobe: Fix to check whether fprobe is registered correctly 2022-11-04 08:50:07 +09:00
ftrace.c ftrace: Fix use-after-free for dynamic ftrace_ops 2022-11-02 23:53:22 -04:00
ftrace_internal.h
kprobe_event_gen_test.c tracing: kprobe: Fix potential null-ptr-deref on trace_array in kprobe_event_gen_test_exit() 2022-11-18 10:15:34 +09:00
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
rethook.c rethook: fix a potential memleak in rethook_alloc() 2022-11-18 10:15:34 +09:00
ring_buffer.c ring-buffer: Include dropped pages in counting dirty patches 2022-11-16 18:08:29 -05:00
ring_buffer_benchmark.c
rpm-traces.c
synth_event_gen_test.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
trace.c tracing/ring-buffer: Have polling block on watermark 2022-11-16 17:13:04 -05:00
trace.h tracing: Move struct filter_pred into trace_events_filter.c 2022-09-26 13:01:10 -04:00
trace_benchmark.c tracing: Add numeric delta time to the trace event benchmark 2022-09-26 13:01:09 -04:00
trace_benchmark.h tracing: Add numeric delta time to the trace event benchmark 2022-09-26 13:01:09 -04:00
trace_boot.c tracing: Initialize integer variable to prevent garbage return value 2022-05-26 21:13:00 -04:00
trace_branch.c
trace_clock.c tracing: Do no increment trace_clock_global() by one 2021-06-18 09:10:00 -04:00
trace_dynevent.c tracing: Auto generate event name when creating a group of events 2022-07-24 19:11:17 -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: Fix race where eprobes can be called before the event 2022-11-24 00:42:18 +09:00
trace_event_perf.c tracing/perf: Fix double put of trace event when init fails 2022-08-21 15:56:07 -04:00
trace_events.c tracing: Have filter accept "common_cpu" to be consistent 2022-08-21 15:56:08 -04:00
trace_events_filter.c tracing/filter: Call filter predicate functions directly via a switch statement 2022-09-26 13:01:10 -04:00
trace_events_filter_test.h
trace_events_hist.c tracing/hist: Call hist functions directly via a switch statement 2022-09-26 13:01:10 -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 reading strings from synthetic events 2022-10-12 13:51:16 -04:00
trace_events_trigger.c tracing: Fix to check event_mutex is held while accessing trigger list 2022-09-06 22:26:00 -04:00
trace_events_user.c tracing/user_events: Move pages/locks into groups to prepare for namespaces 2022-10-03 13:28:46 -04:00
trace_export.c
trace_functions.c ftrace: disable preemption when recursion locked 2021-10-27 11:21:49 -04:00
trace_functions_graph.c tracing: in_irq() cleanup 2021-10-13 18:19:41 -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
trace_kdb.c kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
trace_kprobe.c tracing: Move duplicate code of trace_kprobe/eprobe.c into header 2022-10-12 13:50:00 -04:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_mmiotrace.c
trace_nop.c
trace_osnoise.c tracing/osnoise: Fix possible recursive locking in stop_per_cpu_kthreads 2022-09-26 16:05:18 -04:00
trace_output.c tracing: Remove usage of list iterator after the loop body 2022-04-27 17:19:30 -04:00
trace_output.h
trace_preemptirq.c tracing: hold caller_addr to hardirq_{enable,disable}_ip 2022-09-06 22:26:00 -04:00
trace_printk.c tracing: Disable "other" permission bits in the tracefs files 2021-10-08 18:08:43 -04:00
trace_probe.c tracing/probes: Have kprobes and uprobes use $COMM too 2022-08-21 15:56:08 -04:00
trace_probe.h tracing/eprobe: Add eprobe filter support 2022-09-26 13:01:08 -04:00
trace_probe_kernel.h tracing: Add "(fault)" name injection to kernel probes 2022-10-12 13:50:20 -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_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.c tracing: Reset the function filter after completing trampoline/graph selftest 2022-05-25 16:57:37 -04:00
trace_selftest_dynamic.c
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 5.20 / 6.0 2022-08-05 09:41:12 -07:00
tracing_map.c tracing: Remove unused variable 'dups' 2022-10-03 12:20:31 -04:00
tracing_map.h