lkml.org 
[lkml]   [2022]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject[PATCH v2 0/6] tracing/eprobes: Fixes for unexpected arguments

While using eprobes, I decided to entertain the thougth of what would
happen if I tried to get the instruction pointer "%rip", knowing full
well that eprobes do not have access to pt_regs. Well, I found out, and
it led me down a rabbit hole of bugs.

This series fixes those bugs, by not allowing register access for eprobes,
and also filling the holes of @symbol and @immediate argument.

Changes since v1: https://lore.kernel.org/all/20220820014035.531145719@goodmis.org/
- Fixed parenthesis warning

- Fixed comment about comm arguments

- Made kprobes and eprobes process "$COMM" as well as "$comm"

- Made filters consistent with histograms with "common_cpu"

Steven Rostedt (Google) (6):
tracing/eprobes: Do not allow eprobes to use $stack, or % for regs
tracing/eprobes: Do not hardcode $comm as a string
tracing/eprobes: Fix reading of string fields
tracing/eprobes: Have event probes be consistent with kprobes and uprobes
tracing/probes: Have kprobes and uprobes use $COMM too
tracing: Have filter accept "common_cpu" to be consistent

----
kernel/trace/trace_eprobe.c | 91 ++++++++++++++++++++++++++++++++++++++++++---
kernel/trace/trace_events.c | 1 +
kernel/trace/trace_probe.c | 29 +++++++++------
3 files changed, 104 insertions(+), 17 deletions(-)

\
 
 \ /
  Last update: 2022-08-20 15:44    [W:0.744 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site