Messages in this thread | | | From | Pingfan Liu <> | Subject | [PATCH 0/3] tracing/filter: make filter_pred_pchar() survive the access to user space | Date | Fri, 7 Jan 2022 12:49:48 +0800 |
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When echo "filename ~ \"cpu\"" > events/syscalls/sys_enter_openat/filter echo 1 > events/syscalls/sys_enter_at/enable The kernel will run into a #PF (see [3/3]. This series resorts to copy_from_user() to cope with the access to user space.
Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> To: linux-kernel@vger.kernel.org
Pingfan Liu (3): tracing/filter: degrade addr in filter_pred_string() from double pointer to pointer tracing/filter: harden the prototype of predicate_parse() tracing/filter: make filter_pred_pchar() survive the access to user space
kernel/trace/trace.h | 1 + kernel/trace/trace_events_filter.c | 38 ++++++++++++++++++++++++------ 2 files changed, 32 insertions(+), 7 deletions(-)
-- 2.31.1
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