question about Make CONFIG_STRICT_MEMORY_RWX even stricter patch

[Wang, Yalin]

Hi  

I see ,

__patch_text( )   this function has been changed to make sure
The text section can be writable .


Thanks 

-----Original Message-----
From: Wang, Yalin 
Sent: Tuesday, October 29, 2013 1:50 PM
To: 'lbassel at codeaurora.org'
Cc: 'linux-arm-msm-owner at vger.kernel.org'; linux-arm-msm at vger.kernel.org; linux-arm-kernel at lists.infradead.org; Peng, Arthur; Zhang, Bojie
Subject: question about Make CONFIG_STRICT_MEMORY_RWX even stricter patch 

Hi  ,

We will cherry-pick this patch :
http://cgit.sonyericsson.net/cgit.cgi/kernel/msm.git/commit/?id=2504e77ddedfa34dbd64e757a14e5b21a613c000

for security reason ,

but I have a question about this patch , this patch will make .text  section  permission become RX but not writable , so  some features like  kprobe / jump_label  may can't work correct, these  features will change code during runtime , so it will result in page fault  if it write .text section .


Thanks 



Yalin.Wang
Software Engineer
OS Kernel&Graphics
 
Sony Mobile Communications
Tel: +86 10 5966 9819
Phone: 18610323092
Address: No.16 Guangshun South Street, Chaoyang, Beijing, P.R.C.

sonymobile.com