Masami Hiramatsu (Google) b4700c089a tracing: ring-buffer: Fix to check event length before using ...

[ Upstream commit 912b0ee248 ]

Check the event length before adding it for accessing next index in
rb_read_data_buffer(). Since this function is used for validating
possibly broken ring buffers, the length of the event could be broken.
In that case, the new event (e + len) can point a wrong address.
To avoid invalid memory access at boot, check whether the length of
each event is in the possible range before using it.

Cc: stable@vger.kernel.org
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fixes: 5f3b6e839f ("ring-buffer: Validate boot range memory events")
Link: https://patch.msgid.link/177123421541.142205.9414352170164678966.stgit@devnote2
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-03-04 07:21:59 -05:00

..

rv

…

blktrace.c

…

bpf_trace.c

bpf: Remove migrate_disable in kprobe_multi_link_prog_run

2025-10-15 11:59:56 +02:00

bpf_trace.h

…

error_report-traces.c

…

fgraph.c

function_graph: Restore direct mode when callbacks drop to one

2026-03-04 07:21:57 -05:00

fprobe.c

…

ftrace_internal.h

…

ftrace.c

kallsyms/ftrace: set module buildid in ftrace_mod_address_lookup()

2026-03-04 07:20:02 -05:00

Kconfig

fgraph: Replace fgraph_ret_regs with ftrace_regs

2026-03-04 07:19:36 -05:00

kprobe_event_gen_test.c

…

Makefile

…

pid_list.c

…

pid_list.h

…

power-traces.c

…

preemptirq_delay_test.c

kernel: trace: preemptirq_delay_test: use offstack cpu mask

2025-08-15 12:13:53 +02:00

rethook.c

…

ring_buffer_benchmark.c

…

ring_buffer.c

tracing: ring-buffer: Fix to check event length before using

2026-03-04 07:21:59 -05:00

rpm-traces.c

…

synth_event_gen_test.c

…

trace_benchmark.c

…

trace_benchmark.h

…

trace_boot.c

…

trace_branch.c

…

trace_btf.c

…

trace_btf.h

…

trace_clock.c

…

trace_dynevent.c

tracing: dynevent: Add a missing lockdown check on dynevent

2025-10-02 13:44:13 +02:00

trace_dynevent.h

…

trace_entries.h

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

trace_eprobe.c

…

trace_event_perf.c

…

trace_events_filter_test.h

…

trace_events_filter.c

…

trace_events_hist.c

tracing: Properly process error handling in event_hist_trigger_parse()

2026-03-04 07:20:24 -05:00

trace_events_inject.c

…

trace_events_synth.c

tracing: Fix crash on synthetic stacktrace field usage

2026-01-30 10:28:46 +01:00

trace_events_trigger.c

…

trace_events_user.c

…

trace_events.c

tracing: Remove duplicate ENABLE_EVENT_STR and DISABLE_EVENT_STR macros

2026-03-04 07:20:25 -05:00

trace_export.c

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

trace_fprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_functions_graph.c

…

trace_functions.c

…

trace_hwlat.c

tracing: Fix false sharing in hwlat get_sample()

2026-03-04 07:21:21 -05:00

trace_irqsoff.c

…

trace_kdb.c

…

trace_kprobe_selftest.c

…

trace_kprobe_selftest.h

…

trace_kprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_mmiotrace.c

…

trace_nop.c

…

trace_osnoise.c

…

trace_output.c

…

trace_output.h

…

trace_preemptirq.c

…

trace_printk.c

…

trace_probe_kernel.h

…

trace_probe_tmpl.h

…

trace_probe.c

…

trace_probe.h

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_recursion_record.c

…

trace_sched_switch.c

…

trace_sched_wakeup.c

…

trace_selftest_dynamic.c

…

trace_selftest.c

…

trace_seq.c

…

trace_stack.c

…

trace_stat.c

…

trace_stat.h

…

trace_synth.h

…

trace_syscalls.c

…

trace_uprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace.c

tracing: Fix to set write permission to per-cpu buffer_size_kb

2026-03-04 07:21:56 -05:00

trace.h

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

tracing_map.c

…

tracing_map.h

…