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Natalia Petrova d2d1ada58e trace_events_hist: add check for return value of 'create_hist_field' 
commit 8b152e9150d07a885f95e1fd401fc81af202d9a4 upstream.

Function 'create_hist_field' is called recursively at
trace_events_hist.c:1954 and can return NULL-value that's why we have
to check it to avoid null pointer dereference.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Link: https://lkml.kernel.org/r/20230111120409.4111-1-n.petrova@fintech.ru

Cc: stable@vger.kernel.org
Fixes: 30350d65ac56 ("tracing: Add variable support to hist triggers")
Signed-off-by: Natalia Petrova <n.petrova@fintech.ru>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-06 07:49:41 +01:00
..
blktrace.c
blktrace: Fix output non-blktrace event when blk_classic option enabled
2023-01-18 11:30:17 +01:00
bpf_trace.c
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
2021-07-20 16:15:42 +02:00
ftrace.c
ftrace: Fix null pointer dereference in ftrace_add_mod()
2022-11-25 17:40:25 +01:00
Kconfig
tracing/kprobes: Do the notrace functions check without kprobes on ftrace
2021-01-19 18:22:35 +01:00
Makefile
tracing: Allow gcov profiling on only ftrace subsystem
2018-08-21 09:11:49 -04:00
power-traces.c
…
preemptirq_delay_test.c
tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c
2018-10-17 15:35:33 -04:00
ring_buffer_benchmark.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
ring_buffer.c
ring_buffer: Do not deactivate non-existant pages
2022-11-25 17:40:25 +01:00
rpm-traces.c
…
trace_benchmark.c
…
trace_benchmark.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_branch.c
Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"
2019-07-03 13:14:41 +02:00
trace_clock.c
tracing: Do no increment trace_clock_global() by one
2021-06-30 08:48:23 -04:00
trace_entries.h
tracing: Set kernel_stack's caller size properly
2020-10-01 13:14:31 +02:00
trace_event_perf.c
tracing: Fix race in perf_trace_buf initialization
2019-10-29 09:20:03 +01:00
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: Have error path in predicate_parse() free its allocated memory
2020-08-05 10:05:59 +02:00
trace_events_hist.c
trace_events_hist: add check for return value of 'create_hist_field'
2023-02-06 07:49:41 +01:00
trace_events_trigger.c
tracing: Dump stacktrace trigger to the corresponding instance
2022-04-27 13:39:42 +02:00
trace_events.c
tracing: Have filter accept "common_cpu" to be consistent
2022-08-25 11:15:35 +02:00
trace_export.c
…
trace_functions_graph.c
tracing/fgraph: Fix set_graph_function from showing interrupts
2018-12-08 12:59:07 +01:00
trace_functions.c
tracing: Have all levels of checks prevent recursion
2021-10-27 09:53:15 +02:00
trace_hwlat.c
tracing: Remove WARN_ON in start_thread()
2020-12-08 10:18:55 +01:00
trace_irqsoff.c
tracing/fgraph: Fix set_graph_function from showing interrupts
2018-12-08 12:59:07 +01:00
trace_kdb.c
tracing: Silence GCC 9 array bounds warning
2019-06-25 11:35:52 +08:00
trace_kprobe_selftest.c
selftest/ftrace: Move kprobe selftest function to separate compile unit
2018-07-30 18:41:04 -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
tracing/kprobe: Fix kprobe_on_func_entry() modification
2021-09-26 13:39:47 +02:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_output.c
tracing: Make sure trace_printk() can output as soon as it can be used
2023-02-06 07:49:41 +01:00
trace_output.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_preemptirq.c
lockdep: fix order in trace_hardirqs_off_caller()
2020-10-01 13:14:50 +02:00
trace_printk.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_probe.c
tracing/probes: Have kprobes and uprobes use $COMM too
2022-08-25 11:15:48 +02:00
trace_probe.h
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_sched_switch.c
tracing: Fix sched switch start/stop refcount racy updates
2020-02-11 04:33:55 -08:00
trace_sched_wakeup.c
kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail
2020-01-14 20:06:59 +01:00
trace_selftest_dynamic.c
…
trace_selftest.c
ftrace: Handle tracing when switching between context
2020-11-10 12:35:58 +01:00
trace_seq.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_stack.c
tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
2020-01-14 20:06:59 +01:00
trace_stat.c
tracing: Fix very unlikely race of registering two stat tracers
2020-02-24 08:34:39 +01:00
trace_stat.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_syscalls.c
…
trace_uprobe.c
tracing/uprobes: Fix output for multiple string arguments
2019-02-20 10:25:48 +01:00
trace.c
tracing: Make sure trace_printk() can output as soon as it can be used
2023-02-06 07:49:41 +01:00
trace.h
tracing: Make sure trace_printk() can output as soon as it can be used
2023-02-06 07:49:41 +01:00
tracing_map.c
tracing: Fix a kmemleak false positive in tracing_map
2021-12-22 09:19:00 +01:00
tracing_map.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00