Messages in this thread | | | Date | Mon, 02 Jul 2007 18:03:46 -0400 | From | Chuck Ebbert <> | Subject | Re: [PATCH] i386 - Fix regression, endless loop in ptrace singlestep over an int80 |
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On 07/02/2007 04:53 PM, Jason Wessel wrote: > > Attached is a patch with a complete test case to fix the regression > introduced by the commit: 635cf99a80f4ebee59d70eb64bb85ce829e4591f. > > This patch is against kernel 2.6.21 but the fix is applicable to 2.6.21 > and up. Prior to the commit that introduced the regression the ltp > ptrace tests would complete correctly. I augmented the test case from > the original patch header to include the problem case that shows up in > the lpt tests. > > The brief summary is that the the TIF_SINGLESTEP state needs to be > altered on the exit path and not the entry path to a syscall, else it > can loop forever on the same instruction right after the syscall is > executed in certain cases.
Where does it loop?
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