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aa72812b49104bb5a38272fc9541feb62ca6fd32
linux/kernel/trace
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Masami Hiramatsu (Google) aa72812b49 tracing/fprobe: Avoid kcalloc() in rcu_read_lock section 
fprobe_remove_node_in_module() is called under RCU read locked, but
this invokes kcalloc() if there are more than 8 fprobes installed
on the module. Sashiko warns it because kcalloc() can sleep [1].

 [1] https://sashiko.dev/#/patchset/177552432201.853249.5125045538812833325.stgit%40mhiramat.tok.corp.google.com

To fix this issue, expand the batch size to 128 and do not expand
the fprobe_addr_list, but just cancel walking on fprobe_ip_table,
update fgraph/ftrace_ops and retry the loop again.

Link: https://lore.kernel.org/all/177669367206.132053.1493637946869032744.stgit@mhiramat.tok.corp.google.com/

Fixes: 0de4c70d04 ("tracing: fprobe: use rhltable for fprobe_ip_table")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
2026-04-22 00:02:59 +09:00
..
rv
rv: Allow epoll in rtapp-sleep monitor
2026-04-01 15:18:30 +02:00
.gitignore
tracing: tell git to ignore the generated 'undefsyms_base.c' file
2026-04-20 17:25:56 -07:00
blktrace.c
Merge tag 'block-7.0-20260305' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2026-03-06 08:36:18 -08:00
bpf_trace.c
bpf: Reject sleepable kprobe_multi programs at attach time
2026-04-02 09:48:46 -07:00
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: Do not call handlers direct when not using ftrace_ops
2026-02-19 15:21:22 -05:00
fprobe.c
tracing/fprobe: Avoid kcalloc() in rcu_read_lock section
2026-04-22 00:02:59 +09:00
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
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
Kconfig
tracing: Add a trace remote module for testing
2026-03-09 12:33:55 -04:00
kprobe_event_gen_test.c
tracing: Fix wrong return in kprobe_event_gen_test.c
2023-03-19 12:20:48 -04:00
Makefile
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
pid_list.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
pid_list.h
trace/pid_list: optimize pid_list->lock contention
2025-11-13 15:15:54 -05:00
power-traces.c
PM: cpufreq: powernv/tracing: Move powernv_throttle trace event
2025-07-21 16:40:56 -04:00
preemptirq_delay_test.c
kernel: trace: preemptirq_delay_test: use offstack cpu mask
2025-07-08 18:17:38 -04:00
remote_test_events.h
tracing: Add a trace remote module for testing
2026-03-09 12:33:55 -04:00
remote_test.c
tracing: Add a trace remote module for testing
2026-03-09 12:33:55 -04:00
rethook.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ring_buffer_benchmark.c
tracing: Fix typo in ring_buffer_benchmark.c
2025-12-05 15:43:40 -05:00
ring_buffer.c
ring-buffer: Prevent off-by-one array access in ring_buffer_desc_page()
2026-04-14 05:13:09 -04:00
rpm-traces.c
…
simple_ring_buffer.c
tracing: load/unload page callbacks for simple_ring_buffer
2026-03-09 12:33:55 -04:00
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
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_boot.c
tracing: Make the backup instance non-reusable
2026-04-02 13:20:38 -04:00
trace_branch.c
tracing: branch: Use trace_tracing_is_on_cpu() instead of "disabled" field
2025-05-09 15:19:10 -04:00
trace_btf.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_btf.h
tracing/probes: Add a function to search a member of a struct/union
2023-08-23 09:40:16 +09:00
trace_clock.c
tracing: Use atomic64_inc_return() in trace_clock_counter()
2024-10-09 19:59:49 -04:00
trace_dynevent.c
tracing: Report wrong dynamic event command
2025-11-10 19:26:14 -05:00
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
tracing: Fix ftrace event field alignments
2026-02-05 09:47:11 -05:00
trace_eprobe.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
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
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_events_hist.c
tracing: Fix fully-qualified variable reference printing in histograms
2026-04-14 05:28:10 -04:00
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: Use explicit array size instead of sentinel elements in symbol printing
2026-03-12 12:15:53 +01:00
trace_events_trigger.c
tracing: Drain deferred trigger frees if kthread creation fails
2026-03-28 08:32:44 -04:00
trace_events_user.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_events.c
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
trace_export.c
tracing: Fix ftrace event field alignments
2026-02-05 09:47:11 -05:00
trace_fprobe.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_functions_graph.c
fgraph: Fix thresh_return nosleeptime double-adjust
2026-03-03 22:11:20 -05:00
trace_functions.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_hwlat.c
tracing: Fix false sharing in hwlat get_sample()
2026-02-10 03:36:39 -05:00
trace_irqsoff.c
tracing: Allow tracer to add more than 32 options
2025-11-04 21:44:00 +09:00
trace_kdb.c
tracing: Allow tracer to add more than 32 options
2025-11-04 21:44:00 +09:00
trace_kprobe_selftest.c
tracing: arm64: Avoid missing-prototype warnings
2023-07-12 12:06:04 -04:00
trace_kprobe_selftest.h
…
trace_kprobe.c
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
trace_mmiotrace.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_nop.c
…
trace_osnoise.c
Merge tag 'trace-latency-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 10:12:11 -07:00
trace_output.c
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
trace_output.h
tracing: Allow tracer to add more than 32 options
2025-11-04 21:44:00 +09:00
trace_pid.c
tracing: Move pid filtering into trace_pid.c
2026-02-08 21:01:13 -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
tracing: move __printf() attribute on __ftrace_vbprintk()
2026-03-23 20:16:45 -04:00
trace_probe_kernel.h
tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails
2023-07-14 17:04:58 +09:00
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/probe: reject non-closed empty immediate strings
2026-04-06 09:22:42 +09:00
trace_probe.h
tracing: probes: Use __free() for trace_probe_log
2025-11-01 01:10:28 +09:00
trace_recursion_record.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_remote.c
tracing: Non-consuming read for trace remotes with an offline CPU
2026-04-02 14:16:09 +01:00
trace_sched_switch.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_sched_wakeup.c
tracing: Allow tracer to add more than 32 options
2025-11-04 21:44:00 +09:00
trace_selftest_dynamic.c
…
trace_selftest.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_seq.c
tracing: Add bitmask-list option for human-readable bitmask display
2026-01-26 17:00:50 -05:00
trace_snapshot.c
tracing: Remove duplicate latency_fsnotify() stub
2026-03-31 14:58:39 -04:00
trace_stack.c
Merge tag 'trace-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-05-29 21:04:36 -07:00
trace_stat.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace_stat.h
…
trace_synth.h
tracing: Allow synthetic events to pass around stacktraces
2023-01-25 10:31:24 -05:00
trace_syscalls.c
tracing: Use explicit array size instead of sentinel elements in symbol printing
2026-03-12 12:15:53 +01:00
trace_uprobe.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
trace.c
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
trace.h
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
tracing_map.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
tracing_map.h
tracing: Remove unused extern declaration tracing_map_set_field_descr()
2023-07-23 11:08:14 -04:00