Messages in this thread | | | Date | Thu, 04 Oct 2007 21:33:12 +0900 | From | Shi Weihua <> | Subject | Re: [PATCH 1/3] signal(i386): alternative signal stack wraparound occurs |
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KAMEZAWA Hiroyuki wrote:: > On Thu, 04 Oct 2007 20:56:14 +0900 > Shi Weihua <shiwh@cn.fujitsu.com> wrote: > >> stack.ss_sp = addr + pagesize; >> stack.ss_flags = 0; >> stack.ss_size = pagesize; > Here is bad. > stack,ss_sp = addr; > stack.ss_flags = 0; > stack.ss_size = pagesize * 2; [What the test code want to do] addr+pagesize*2 - addr+pagesize -> sigaltstack addr+pagesize - addr -> protected region The code want to catch overflow when esp enter the protected region.
But it failed ... > > cheers. > -Kame > > >
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