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linux/kernel/trace
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Steven Rostedt 0a8f11f856 tracing: Do not take trace_event_sem in print_event_fields() 
On some paths in print_event_fields() it takes the trace_event_sem for
read, even though it should always be held when the function is called.

Remove the taking of that mutex and add a lockdep_assert_held_read() to
make sure the trace_event_sem is held when print_event_fields() is called.

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250501224128.0b1f0571@batman.local.home
Fixes: 80a76994b2 ("tracing: Add "fields" option to show raw trace event fields")
Reported-by: syzbot+441582c1592938fccf09@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/6813ff5e.050a0220.14dd7d.001b.GAE@google.com/
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-05-01 22:44:52 -04:00
..
rv
rv: Fix out-of-bound memory access in rv_is_container_monitor()
2025-04-12 12:13:30 -04:00
blktrace.c
blktrace: remove redundant return at end of function
2024-12-23 08:17:23 -07:00
bpf_trace.c
Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
2025-03-30 15:44:36 -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
tracing: add error_report_end trace point
2021-02-26 09:41:02 -08:00
fgraph.c
fgraph: Correct typo in ftrace_return_to_handler comment
2025-03-04 11:15:50 -05:00
fprobe.c
tracing: fprobe: Cleanup fprobe hash when module unloading
2025-04-08 08:46:25 +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
ftrace: Fix NULL memory allocation check
2025-05-01 15:46:19 -04:00
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
tracing: Fix wrong return in kprobe_event_gen_test.c
2023-03-19 12:20:48 -04:00
Makefile
tracing/probes: Move finding func-proto API and getting func-param API to trace_btf
2023-08-23 09:39:45 +09:00
pid_list.c
pid: allow pid_max to be set per pid namespace
2024-12-02 11:25:25 +01:00
pid_list.h
tracing: Create a sparse bitmask for pid filtering
2021-10-05 17:38:45 -04:00
power-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
preemptirq_delay_test.c
minmax: make generic MIN() and MAX() macros available everywhere
2024-07-28 15:49:18 -07:00
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
Merge tag 'trace-ringbuffer-v6.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-04-03 16:09:29 -07:00
rpm-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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: 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
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/string: Create and use __free(argv_free) in trace_dynevent.c
2024-12-26 10:38:37 -05:00
trace_dynevent.h
tracing: Add DYNAMIC flag for dynamic events
2021-08-18 18:10:32 -04:00
trace_entries.h
ftrace: Fix type of ftrace_graph_ent_entry.depth
2025-04-17 15:19:15 -04:00
trace_eprobe.c
Merge tag 'probes-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-03-27 19:31:34 -07:00
trace_event_perf.c
perf: Remove unnecessary parameter of security check
2025-02-26 14:13:58 -05:00
trace_events_filter_test.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_events_filter.c
tracing: Fix filter string testing
2025-04-17 22:16:56 -04:00
trace_events_hist.c
Merge tag 'trace-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-03-27 16:22:12 -07:00
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: Constify struct event_trigger_ops
2025-03-20 07:04:00 -04:00
trace_events_user.c
tracing/user_events: Slightly simplify user_seq_show()
2025-03-06 13:35:27 -05:00
trace_events.c
tracing: Verify event formats that have "%*p.."
2025-04-02 09:51:26 -04:00
trace_export.c
tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure
2023-07-30 18:11:44 -04:00
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
ftrace: Do not have print_graph_retval() add a newline
2025-04-12 12:13:30 -04:00
trace_functions.c
ftrace: Add arguments to function tracer
2025-03-04 11:27:24 -05:00
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
trace: kdb: Replace simple_strtoul with kstrtoul in kdb_ftdump
2024-11-02 08:33:13 +00:00
trace_kprobe_selftest.c
tracing: arm64: Avoid missing-prototype warnings
2023-07-12 12:06:04 -04:00
trace_kprobe_selftest.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_kprobe.c
Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
2025-03-30 15:44:36 -07:00
trace_mmiotrace.c
tracing: Remove TRACE_EVENT_FL_FILTERED logic
2024-10-08 15:24:49 -04:00
trace_nop.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_osnoise.c
Merge tag 'trace-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-03-27 16:22:12 -07:00
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
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -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-events: Add comments about entry data storing code
2025-03-27 21:19:54 +09:00
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
tracing: Use trace_create_file() to simplify creation of tracefs entries
2022-05-26 21:12:52 -04:00
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
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
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
tracing: Use generic type for comparator function
2019-11-14 13:15:11 -05:00
trace_synth.h
tracing: Allow synthetic events to pass around stacktraces
2023-01-25 10:31:24 -05:00
trace_syscalls.c
tracing/perf: Add might_fault check to syscall probes
2024-10-09 17:09:46 -04:00
trace_uprobe.c
tracing: probe-events: Log error for exceeding the number of arguments
2025-03-27 21:19:54 +09:00
trace.c
tracing: Fix trace_adjust_address() when there is no modules in scratch area
2025-05-01 16:06:55 -04:00
trace.h
Merge tag 'trace-ringbuffer-v6.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-04-03 16:09:29 -07:00
tracing_map.c
tracing: Fix cmp_entries_dup() to respect sort() comparison rules
2024-12-04 10:38:24 -05:00
tracing_map.h
tracing: Remove unused extern declaration tracing_map_set_field_descr()
2023-07-23 11:08:14 -04:00