[Bug 567956] Re: ARM: Incorrect prefetch abort handling can cause a spin instead of SIGSEGV

[Dave Martin]

** Description changed:

  http://article.gmane.org/gmane.linux.kernel.commits.head/213639
  
  "    ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7
  
      Currently, on ARMv6 and ARMv7, if an application tries to execute
      code (or garbage) on non-executable page it hangs. It caused by
      incorrect prefetch abort handling. Now every prefetch abort
      processes as a translation fault. "
  
- I believe the patch was merges in 2.6.32, so it is _probably_ already
- applied in the dove tree (but it might be worth checking)
+ I believe the patch was merges in 2.6.32, so it is _probably_ already applied in the dove tree (but it might be worth checking)
+ [update: This bug does *not* affect the dove tree— confirmed]
  
  This patch doesn't appear critical; it just affects cases where
  processes are already crashing by trying to execute in invalid address
  space.  I'm not aware of any real problems in lucid caused by this at
  present.
  
  Test case:
  
  int main(void)
  {
   ((void (*)(void))0xc0000000)();
  }
  
  Desired result is SIGSEGV.

-- 
ARM: Incorrect prefetch abort handling can cause a spin instead of SIGSEGV
https://bugs.launchpad.net/bugs/567956
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux-fsl-imx51 in ubuntu.