Steven Rostedt (VMware) 938aa33f14 tracing: Add length protection to histogram string copies ... The string copies to the histogram storage has a max size of 256 bytes (defined by MAX_FILTER_STR_VAL). Only the string size of the event field needs to be copied to the event storage, but no more than what is in the event storage. Although nothing should be bigger than 256 bytes, there's no protection against overwriting of the storage if one day there is. Copy no more than the destination size, and enforce it. Also had to turn MAX_FILTER_STR_VAL into an unsigned int, to keep the min() comparison of the string sizes of comparable types. Link: https://lore.kernel.org/all/CAHk-=wjREUihCGrtRBwfX47y_KrLCGjiq3t6QtoNJpmVrAEb1w@mail.gmail.com/ Link: https://lkml.kernel.org/r/20211114132834.183429a4@rorschach.local.home Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Tom Zanussi <zanussi@kernel.org> Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Fixes: 63f84ae6b8 ("tracing/histogram: Do not copy the fixed-size char array field over the field size") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2021-11-14 21:21:08 -05:00
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blktrace.c	blktrace: Fix uaf in blk_trace access after removing by sysfs	2021-09-24 11:06:15 -06:00
bpf_trace.c	bpf: Fix bpf-next builds without CONFIG_BPF_EVENTS	2021-08-25 19:41:39 -07:00
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	x86/ftrace: Make function graph use ftrace directly	2021-10-20 23:44:43 -04:00
ftrace_internal.h
ftrace.c	ftrace/direct: Fix lockup in modify_ftrace_direct_multi	2021-11-10 11:56:43 -05:00
Kconfig	tracing: Simplify the Kconfig dependency of FTRACE	2021-08-16 11:37:20 -04:00
kprobe_event_gen_test.c
Makefile	tracing: Place trace_pid_list logic into abstract functions	2021-10-05 17:30:08 -04:00
pid_list.c	tracing: Initialize upper and lower vars in pid_list_refill_irq()	2021-10-07 09:56:38 -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
ring_buffer_benchmark.c	sched,tracing: Convert to sched_set_fifo()	2020-07-29 11:43:53 +02:00
ring_buffer.c	ring-buffer: Protect ring_buffer_reset() from reentrancy	2021-11-10 11:56:29 -05:00
rpm-traces.c
synth_event_gen_test.c	tracing: Fix various typos in comments	2021-03-23 14:08:18 -04:00
trace_benchmark.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_benchmark.h
trace_boot.c	tracing: Fix missing trace_boot_init_histograms kstrdup NULL checks	2021-10-26 09:18:10 -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: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
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	tracing: Fix some alloc_event_probe() error handling bugs	2021-09-07 20:58:23 -04:00
trace_event_perf.c	tracing: Show size of requested perf buffer	2021-10-27 12:25:09 -04:00
trace_events_filter_test.h
trace_events_filter.c	tracing: Update create_system_filter() kernel-doc comment	2021-03-25 16:04:35 -04:00
trace_events_hist.c	tracing: Add length protection to histogram string copies	2021-11-14 21:21:08 -05:00
trace_events_inject.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_events_synth.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_events_trigger.c	tracing: Add a probe that attaches to trace events	2021-08-20 14:18:40 -04:00
trace_events.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_export.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_functions_graph.c	tracing: in_irq() cleanup	2021-10-13 18:19:41 -04:00
trace_functions.c	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
trace_hwlat.c	tracing/hwlat: Make some internal symbols static	2021-10-26 09:18:28 -04:00
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_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
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/osnoise: Make osnoise_instances static	2021-11-12 09:25:59 -05:00
trace_output.c	tracing: Show kretprobe unknown indicator only for kretprobe_trampoline	2021-09-30 21:24:08 -04:00
trace_output.h	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
trace_preemptirq.c	lockdep: fix order in trace_hardirqs_off_caller()	2020-09-14 10:08:07 +02:00
trace_printk.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -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_probe.c	tracing: Add a probe that attaches to trace events	2021-08-20 14:18:40 -04:00
trace_probe.h	tracing: Add a probe that attaches to trace events	2021-08-20 14:18:40 -04:00
trace_recursion_record.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_sched_switch.c
trace_sched_wakeup.c	tracing: Change variable type as bool for clean-up	2021-06-30 09:19:14 -04:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Fix selftest config check for function graph start up test	2021-10-21 14:18:48 -04:00
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: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_uprobe.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace.c	tracing/histogram: Document hist trigger variables	2021-11-01 20:46:52 -04:00
trace.h	tracing: in_irq() cleanup	2021-10-13 18:19:41 -04:00
tracing_map.c	tracing/cfi: Fix cmp_entries_* functions signature mismatch	2021-10-19 20:33:20 -04:00
tracing_map.h	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00