linux-kernel - [PATCH 0/2] Fix the bug that function never be patched, if the name is larger than KSYM_NAME

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Message-ID: <BLU436-SMTP24381975C80B5DE3AB36F7C94F80@phx.gbl>
Date:	Sun, 12 Apr 2015 21:15:52 +0800
From:	Minfei Huang <minfei.huang@...mail.com>
To:	jpoimboe@...hat.com, sjenning@...hat.com, jkosina@...e.cz,
	vojtech@...e.cz
CC:	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
	Minfei Huang <minfei.huang@...mail.com>
Subject: [PATCH 0/2] Fix the bug that function never be patched, if the name is larger than KSYM_NAME_LEN-1 

For now, the kallsyms will only store the first (KSYM_NAME_LEN-1). The
kallsyms name is same for the function which first (KSYM_NAME_LEN-1) is
same, but the rest is not.

Livepatch will verify the function name to confirm the patch is
validation or not for extra module. Once the function name is larger
than (KSYM_NAME_LEN-1), the function never be patched, although
function name and address provided both, according to above verification.

Now, livepatch will verify the function name with first (KSYM_NAME_LEN-1)
and address, if provided. Once they are matched, we can confirm that the
patched function is found.

Minfei Huang (2):
  livepatch: Add a new function to verify the address and name match for
        patched module
  livepatch: Fix the bug if the function name is larger than
    KSYM_NAME_LEN-1

 kernel/livepatch/core.c | 55 ++++++++++++++++++++++++++++++++++---------------
 1 file changed, 38 insertions(+), 17 deletions(-)

-- 
2.2.2

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