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Date: Fri, 7 Jan 2022 12:49:48 +0800 From: Pingfan Liu <kernelfans@...il.com> To: linux-kernel@...r.kernel.org Cc: Pingfan Liu <kernelfans@...il.com>, Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...hat.com> Subject: [PATCH 0/3] tracing/filter: make filter_pred_pchar() survive the access to user space 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@...dmis.org> Cc: Ingo Molnar <mingo@...hat.com> To: linux-kernel@...r.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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