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Beau Belgrave 4fe46b5adf tracing/user_events: Ensure write index cannot be negative 
[ Upstream commit cd98c93286 ]

The write index indicates which event the data is for and accesses a
per-file array. The index is passed by user processes during write()
calls as the first 4 bytes. Ensure that it cannot be negative by
returning -EINVAL to prevent out of bounds accesses.

Update ftrace self-test to ensure this occurs properly.

Link: https://lkml.kernel.org/r/20230425225107.8525-2-beaub@linux.microsoft.com

Fixes: 7f5a08c79d ("user_events: Add minimal support for trace_event into ftrace")
Reported-by: Doug Cook <dcook@linux.microsoft.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2023-05-11 23:11:25 +09:00
..
rv rv: remove redundant initialization of pointer ptr 2023-01-25 10:31:02 -05:00
Kconfig tracing: Kconfig: Fix spelling/grammar/punctuation 2023-01-24 13:22:38 -05:00
Makefile rv: Add Runtime Verification (RV) interface 2022-07-30 14:01:28 -04:00
blktrace.c trace/blktrace: fix memory leak with using debugfs_lookup() 2023-03-10 09:29:06 +01:00
bpf_trace.c bpf: Fix a possible task gone issue with bpf_send_signal[_thread]() helpers 2023-01-18 18:44:16 -08:00
bpf_trace.h
…
error_report-traces.c
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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 issue that 'direct->addr' not restored in modify_ftrace_direct() 2023-04-13 17:02:50 +02:00
ftrace_internal.h
…
kprobe_event_gen_test.c tracing: Fix wrong return in kprobe_event_gen_test.c 2023-04-06 12:12:30 +02:00
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
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rethook.c rethook: fix a potential memleak in rethook_alloc() 2022-11-18 10:15:34 +09:00
ring_buffer.c ring-buffer: Sync IRQ works before buffer destruction 2023-05-11 23:10:52 +09:00
ring_buffer_benchmark.c ring_buffer: Remove unused "event" parameter 2022-11-23 19:08:30 -05:00
rpm-traces.c
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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 permissions for the buffer_percent file 2023-05-11 23:10:54 +09:00
trace.h tracing: Fix TASK_COMM_LEN in trace event format file 2023-02-12 10:23:39 -05:00
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
…
trace_clock.c
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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
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trace_eprobe.c tracing: Fix race where eprobes can be called before the event 2022-11-24 00:42:18 +09:00
trace_event_perf.c tracing/perf: Use strndup_user instead of kzalloc/strncpy_from_user 2022-11-23 19:08:31 -05:00
trace_events.c tracing: Make trace_define_field_ext() static 2023-02-12 20:14:11 -05:00
trace_events_filter.c tracing/filter: fix kernel-doc warnings 2023-01-25 10:28:13 -05:00
trace_events_filter_test.h
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trace_events_hist.c tracing: Check field value in hist_field_name() 2023-03-22 13:38:01 +01:00
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 17:02:54 +02:00
trace_events_trigger.c tracing: Do not synchronize freeing of trigger filter on boot up 2022-12-14 08:50:56 -05:00
trace_events_user.c tracing/user_events: Ensure write index cannot be negative 2023-05-11 23:11:25 +09:00
trace_export.c tracing: Fix TASK_COMM_LEN in trace event format file 2023-02-12 10:23:39 -05:00
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 12:50:48 +02:00
trace_irqsoff.c
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trace_kdb.c kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
trace_kprobe.c trace/kprobe: remove duplicated calls of ring_buffer_event_data 2022-12-09 23:48:05 -05:00
trace_kprobe_selftest.c
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trace_kprobe_selftest.h
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trace_mmiotrace.c
…
trace_nop.c
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trace_osnoise.c tracing/osnoise: Fix notify new tracing_max_latency 2023-04-13 17:02:51 +02:00
trace_output.c tracing: Make sure trace_printk() can output as soon as it can be used 2023-01-24 11:27:29 -05:00
trace_output.h
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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 Trace probes updates for 6.2: 2022-12-21 18:57:24 -08:00
trace_probe.h tracing/probes: Reject symbol/symstr type for uprobe 2022-12-15 09:00:20 +09:00
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: Add symstr type for dynamic events 2022-12-15 08:48:57 +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 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 x86/ftrace: Make it call depth tracking aware 2022-10-17 16:41:19 +02:00
trace_selftest_dynamic.c
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trace_seq.c
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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
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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/probes: Reject symbol/symstr type for uprobe 2022-12-15 09:00:20 +09:00
tracing_map.c tracing: Remove unused variable 'dups' 2022-10-03 12:20:31 -04:00
tracing_map.h
…