Zheng Yejian 99fe81d219 ftrace: Fix possible warning on checking all pages used in ftrace_process_locs() ... commit 26efd79c4624294e553aeaa3439c646729bad084 upstream. As comments in ftrace_process_locs(), there may be NULL pointers in mcount_loc section: > Some architecture linkers will pad between > the different mcount_loc sections of different > object files to satisfy alignments. > Skip any NULL pointers. After commit 20e5227e9f ("ftrace: allow NULL pointers in mcount_loc"), NULL pointers will be accounted when allocating ftrace pages but skipped before adding into ftrace pages, this may result in some pages not being used. Then after commit 706c81f87f ("ftrace: Remove extra helper functions"), warning may occur at: WARN_ON(pg->next); To fix it, only warn for case that no pointers skipped but pages not used up, then free those unused pages after releasing ftrace_lock. Link: https://lore.kernel.org/linux-trace-kernel/20230712060452.3175675-1-zhengyejian1@huawei.com Cc: stable@vger.kernel.org Fixes: 706c81f87f ("ftrace: Remove extra helper functions") Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-07-23 13:49:44 +02:00
..
rv	rv/monitor: Add __init/__exit annotations to module init/exit funcs	2022-09-26 18:10:51 -04:00
blktrace.c	trace/blktrace: fix memory leak with using debugfs_lookup()	2023-03-10 09:33:46 +01:00
bpf_trace.c	bpf: Add extra path pointer check to d_path helper	2023-06-14 11:15:22 +02:00
bpf_trace.h	bpf: Use dedicated bpf_trace_printk event instead of trace_printk()	2020-07-13 16:55:49 -07:00
error_report-traces.c	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
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 possible warning on checking all pages used in ftrace_process_locs()	2023-07-23 13:49:44 +02:00
ftrace_internal.h	x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up	2020-05-12 18:24:34 -04:00
Kconfig	tracing: Fix complicated dependency of CONFIG_TRACER_MAX_TRACE	2023-01-07 11:11:48 +01:00
kprobe_event_gen_test.c	tracing: Fix wrong return in kprobe_event_gen_test.c	2023-04-06 12:10:41 +02:00
Makefile	rv: Add Runtime Verification (RV) interface	2022-07-30 14:01:28 -04:00
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	kernel: trace: preemptirq_delay_test: add cpu affinity	2021-02-02 17:02:07 -05:00
rethook.c	rethook: use preempt_{disable, enable}_notrace in rethook_trampoline_handler	2023-05-24 17:32:52 +01:00
ring_buffer.c	ring-buffer: Fix deadloop issue on reading trace_pipe	2023-07-23 13:49:44 +02:00
ring_buffer_benchmark.c	sched,tracing: Convert to sched_set_fifo()	2020-07-29 11:43:53 +02:00
rpm-traces.c
synth_event_gen_test.c	tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()	2022-11-17 17:51:38 -05:00
trace.c	tracing: Fix memory leak of iter->temp when reading trace_pipe	2023-07-23 13:49:43 +02:00
trace.h	tracing: Fix TASK_COMM_LEN in trace event format file	2023-02-14 19:11:54 +01:00
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	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: Free buffers when a used dynamic event is removed	2022-11-23 19:07:12 -05:00
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	kernel/trace: Fix cleanup logic of enable_trace_eprobe	2023-07-23 13:49:24 +02:00
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: Make trace_define_field_ext() static	2023-02-22 12:59:53 +01:00
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/histograms: Add histograms to hist_vars if they have referenced variables	2023-07-23 13:49:43 +02:00
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/synthetic: Make lastcmd_mutex static	2023-04-13 16:55:35 +02:00
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: Fix incorrect return value for writing operation when events are disabled	2023-07-23 13:49:32 +02:00
trace_export.c	tracing: Fix TASK_COMM_LEN in trace event format file	2023-02-14 19:11:54 +01:00
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	tracing/hwlat: Replace sched_setaffinity with set_cpus_allowed_ptr	2023-03-30 12:48:59 +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.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	tracing: Remove definition of DEBUG in trace_mmiotrace.c	2021-02-02 17:02:07 -05:00
trace_nop.c
trace_osnoise.c	tracing/timerlat: Always wakeup the timerlat thread	2023-06-09 10:34:24 +02:00
trace_output.c	tracing: Make sure trace_printk() can output as soon as it can be used	2023-02-01 08:34:37 +01:00
trace_output.h	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
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: Handle system names with hyphens	2023-01-07 11:11:48 +01:00
trace_probe.h	tracing/probe: trace_probe_primary_from_call(): checked list_first_entry	2023-06-09 10:34:24 +02:00
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: Remove unused __bad_type_size() method	2022-11-17 20:21:06 -05:00
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	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00