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Date: Thu, 23 Nov 2017 10:45:31 +0530
From: kaiwan.billimoria@...il.com
To: "Tobin C. Harding" <me@...in.cc>
Cc: linux-kernel@...r.kernel.org, "kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>
Subject: [PATCH 2/2] scripts: leaking_addresses: help screen updates
The current leaking_addresses.pl script only supports showing "leaked"
64-bit kernel virtual addresses. This patch modifies the "help" screen in the
following manner:
- the '--raw', '--suppress-dmesg', '--squash-by-path' and '--squash-by-filename'
option switches are only meaningful when the '--input-raw=' option switch is
used. So, indent the 'Help' screen lines to reflect the fact.
- an additional example demonstrating usage of the new '--page-offset'
parameter.
Feedback welcome..
Signed-off-by: Kaiwan N Billimoria <kaiwan.billimoria@...il.com>
---
diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl
index 7ca218221486..3832abb743d7 100755
--- a/scripts/leaking_addresses.pl
+++ b/scripts/leaking_addresses.pl
@@ -105,10 +105,10 @@ Options:
-o, --output-raw=<file> Save results for future processing.
-i, --input-raw=<file> Read results from file instead of scanning.
- --raw Show raw results (default).
- --suppress-dmesg Do not show dmesg results.
- --squash-by-path Show one result per unique path.
- --squash-by-filename Show one result per unique filename.
+ --raw Show raw results (default).
+ --suppress-dmesg Do not show dmesg results.
+ --squash-by-path Show one result per unique path.
+ --squash-by-filename Show one result per unique filename.
--page-offset=<hex> PAGE_OFFSET value (for 32-bit kernels).
-d, --debug Display debugging output.
-h, --help, --version Display this help and exit.
@@ -124,6 +124,10 @@ Examples:
# View summary report.
$0 --input-raw scan.out --squash-by-filename
+ # (On a 32-bit system with a 2GB:2GB VMSPLIT), pass PAGE_OFFSET value
+ # as a parameter
+ $0 --page-offset=0x80000000
+
Scans the running (32 or 64 bit) kernel for potential leaking addresses.
EOM
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