Marco Elver 3c25fc97f5 perf: Copy perf_event_attr::sig_data on modification ... The intent has always been that perf_event_attr::sig_data should also be modifiable along with PERF_EVENT_IOC_MODIFY_ATTRIBUTES, because it is observable by user space if SIGTRAP on events is requested. Currently only PERF_TYPE_BREAKPOINT is modifiable, and explicitly copies relevant breakpoint-related attributes in hw_breakpoint_copy_attr(). This misses copying perf_event_attr::sig_data. Since sig_data is not specific to PERF_TYPE_BREAKPOINT, introduce a helper to copy generic event-type-independent attributes on modification. Fixes: 97ba62b278 ("perf: Add support for SIGTRAP on perf events") Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Link: https://lore.kernel.org/r/20220131103407.1971678-1-elver@google.com		2022-02-02 13:11:40 +01:00
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callchain.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
core.c	perf: Copy perf_event_attr::sig_data on modification	2022-02-02 13:11:40 +01:00
hw_breakpoint.c	perf/hw_breakpoint: Replace deprecated CPU-hotplug functions	2021-08-26 09:14:36 +02:00
internal.h	tracing/perf: Add interrupt_context_level() helper	2021-10-19 20:33:20 -04:00
Makefile	perf/core: allow ftrace for functions in kernel/event/core.c	2021-10-25 22:50:42 -04:00
ring_buffer.c	perf: Cap allocation order at aux_watermark	2021-04-16 16:32:39 +02:00
uprobes.c	mm/memcg: Convert mem_cgroup_charge() to take a folio	2021-09-27 09:27:31 -04:00