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linux-6.15.y
linux/kernel/trace
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Masami Hiramatsu (Google) 3d95aed41f tracing: fprobe: Fix infinite recursion using preempt_*_notrace() 
commit a3e892ab0f upstream.

Since preempt_count_add/del() are tracable functions, it is not allowed
to use preempt_disable/enable() in ftrace handlers. Without this fix,
probing on `preempt_count_add%return` will cause an infinite recursion
of fprobes.

To fix this problem, use preempt_disable/enable_notrace() in
fprobe_return().

Link: https://lore.kernel.org/all/175374642359.1471729.1054175011228386560.stgit@mhiramat.tok.corp.google.com/

Fixes: 4346ba1604 ("fprobe: Rewrite fprobe on function-graph tracer")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-08-20 18:36:34 +02:00
..
rv
rv: Add #undef TRACE_INCLUDE_FILE
2025-08-20 18:36:06 +02:00
blktrace.c
blktrace: remove redundant return at end of function
2024-12-23 08:17:23 -07:00
bpf_trace.c
bpf: Revert "bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic"
2025-06-19 15:39:59 +02:00
bpf_trace.h
tracing/treewide: Remove second parameter of __assign_str()
2024-05-22 20:14:47 -04:00
error_report-traces.c
…
fgraph.c
fgraph: Correct typo in ftrace_return_to_handler comment
2025-03-04 11:15:50 -05:00
fprobe.c
tracing: fprobe: Fix infinite recursion using preempt_*_notrace()
2025-08-20 18:36:34 +02:00
ftrace_internal.h
function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE
2024-06-10 18:08:23 -04:00
ftrace.c
ftrace: Fix UAF when lookup kallsym after ftrace disabled
2025-06-27 11:13:07 +01:00
Kconfig
ftrace: Have tracing function args depend on PROBE_EVENTS_BTF_ARGS
2025-04-02 09:50:56 -04:00
kprobe_event_gen_test.c
…
Makefile
…
pid_list.c
pid: allow pid_max to be set per pid namespace
2024-12-02 11:25:25 +01:00
pid_list.h
…
power-traces.c
PM: cpufreq: powernv/tracing: Move powernv_throttle trace event
2025-08-15 12:16:33 +02:00
preemptirq_delay_test.c
kernel: trace: preemptirq_delay_test: use offstack cpu mask
2025-08-15 12:16:44 +02:00
rethook.c
rethook: honor CONFIG_FTRACE_VALIDATE_RCU_IS_WATCHING in rethook_try_get()
2024-05-01 23:18:48 +09:00
ring_buffer_benchmark.c
ring-buffer: Use str_low_high() helper in ring_buffer_producer()
2024-10-19 11:12:25 -04:00
ring_buffer.c
ring-buffer: Remove ring_buffer_read_prepare_sync()
2025-08-15 12:16:33 +02:00
rpm-traces.c
…
synth_event_gen_test.c
tracing / synthetic: Disable events after testing in synth_event_gen_test_init()
2023-12-21 10:04:45 -05:00
trace_benchmark.c
tracing: Improve benchmark test performance by using do_div()
2024-05-13 20:00:57 -04:00
trace_benchmark.h
…
trace_boot.c
tracing: Allow creating instances with specified system events
2023-12-18 23:14:16 -05:00
trace_branch.c
tracing: Remove TRACE_EVENT_FL_FILTERED logic
2024-10-08 15:24:49 -04:00
trace_btf.c
tracing/probes: Fix to search structure fields correctly
2024-02-17 21:25:42 +09:00
trace_btf.h
…
trace_clock.c
tracing: Use atomic64_inc_return() in trace_clock_counter()
2024-10-09 19:59:49 -04:00
trace_dynevent.c
tracing: probes: Fix a possible race in trace_probe_log APIs
2025-05-13 22:23:34 +09:00
trace_dynevent.h
tracing: probes: Fix a possible race in trace_probe_log APIs
2025-05-13 22:23:34 +09:00
trace_entries.h
ftrace: Fix type of ftrace_graph_ent_entry.depth
2025-04-17 15:19:15 -04:00
trace_eprobe.c
tracing: add missing trace_probe_log_clear for eprobes
2025-05-10 08:44:50 +09:00
trace_event_perf.c
perf: Remove unnecessary parameter of security check
2025-02-26 14:13:58 -05:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing: Use queue_rcu_work() to free filters
2025-08-15 12:16:44 +02:00
trace_events_hist.c
tracing: Rename event_trigger_alloc() to trigger_data_alloc()
2025-06-19 15:39:51 +02:00
trace_events_inject.c
tracing: Have format file honor EVENT_FILE_FL_FREED
2024-08-07 18:12:46 -04:00
trace_events_synth.c
tracing: Do not add length to print format in synthetic events
2025-04-09 11:34:21 -04:00
trace_events_trigger.c
tracing: Fix error handling in event_trigger_parse()
2025-06-19 15:39:51 +02:00
trace_events_user.c
tracing/user_events: Slightly simplify user_seq_show()
2025-03-06 13:35:27 -05:00
trace_events.c
tracing: Add down_write(trace_event_sem) when adding trace event
2025-07-24 08:58:24 +02:00
trace_export.c
…
trace_fprobe.c
Merge tag 'probes-fixes-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-04-08 12:51:34 -07:00
trace_functions_graph.c
fgraph: Do not enable function_graph tracer when setting funcgraph-args
2025-06-27 11:13:34 +01:00
trace_functions.c
ftrace: Fix preemption accounting for stacktrace filter command
2025-05-14 13:53:23 -04:00
trace_hwlat.c
tracing: Remove TRACE_EVENT_FL_FILTERED logic
2024-10-08 15:24:49 -04:00
trace_irqsoff.c
tracing: Fix use-after-free in print_graph_function_flags during tracer switching
2025-03-22 05:42:42 -04:00
trace_kdb.c
ring-buffer: Remove ring_buffer_read_prepare_sync()
2025-08-15 12:16:33 +02:00
trace_kprobe_selftest.c
…
trace_kprobe_selftest.h
…
trace_kprobe.c
tracing: probes: Fix a possible race in trace_probe_log APIs
2025-05-13 22:23:34 +09:00
trace_mmiotrace.c
tracing: Remove TRACE_EVENT_FL_FILTERED logic
2024-10-08 15:24:49 -04:00
trace_nop.c
…
trace_osnoise.c
tracing/osnoise: Fix crash in timerlat_dump_stack()
2025-07-24 08:58:24 +02:00
trace_output.c
tracing: Do not take trace_event_sem in print_event_fields()
2025-05-01 22:44:52 -04:00
trace_output.h
ftrace: Add print_function_args()
2025-03-04 11:27:23 -05:00
trace_preemptirq.c
tracing: Fix archs that still call tracepoints without RCU watching
2024-12-05 09:28:58 -05:00
trace_printk.c
…
trace_probe_kernel.h
…
trace_probe_tmpl.h
tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS
2024-12-26 10:50:04 -05:00
trace_probe.c
tracing/probes: Avoid using params uninitialized in parse_btf_arg()
2025-07-24 08:58:24 +02:00
trace_probe.h
tracing: probe-events: Log error for exceeding the number of arguments
2025-03-27 21:19:54 +09:00
trace_recursion_record.c
…
trace_sched_switch.c
pid: allow pid_max to be set per pid namespace
2024-12-02 11:25:25 +01:00
trace_sched_wakeup.c
tracing: Fix use-after-free in print_graph_function_flags during tracer switching
2025-03-22 05:42:42 -04:00
trace_selftest_dynamic.c
…
trace_selftest.c
fgraph: Pass ftrace_regs to retfunc
2024-12-26 10:50:03 -05:00
trace_seq.c
trace_seq: Increase the buffer size to almost two pages
2023-12-18 23:14:16 -05:00
trace_stack.c
tracing: Switch trace_stack.c code over to use guard()
2024-12-26 10:38:37 -05:00
trace_stat.c
tracing: Switch trace_stat.c code over to use guard()
2024-12-26 10:38:37 -05:00
trace_stat.h
…
trace_synth.h
…
trace_syscalls.c
tracing/perf: Add might_fault check to syscall probes
2024-10-09 17:09:46 -04:00
trace_uprobe.c
tracing: probes: Fix a possible race in trace_probe_log APIs
2025-05-13 22:23:34 +09:00
trace.c
ring-buffer: Remove ring_buffer_read_prepare_sync()
2025-08-15 12:16:33 +02:00
trace.h
tracing: Rename event_trigger_alloc() to trigger_data_alloc()
2025-06-19 15:39:51 +02:00
tracing_map.c
tracing: Fix cmp_entries_dup() to respect sort() comparison rules
2024-12-04 10:38:24 -05:00
tracing_map.h
…