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Red Hat Bugzilla – Attachment 297257 Details for
Bug 436131
CVE-2008-1367 [RHEL5] Kernel doesn't clear DF for signal handlers
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32-bit test case
test.c (text/x-csrc), 467 bytes, created by
Jason Baron
on 2008-03-07 22:07:05 UTC
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Description:
32-bit test case
Filename:
MIME Type:
Creator:
Jason Baron
Created:
2008-03-07 22:07:05 UTC
Size:
467 bytes
patch
obsolete
> >#include <stdint.h> >#include <stdlib.h> >#include <stdio.h> >#include <signal.h> > >void handler(int signal) { > uint64_t rflags; > > asm volatile("pushf ; pop %0" : "=g" (rflags)); > > if (rflags & (1 << 10)) > printf("DF = 1\n"); > else > printf("DF = 0\n"); >} > >int main() { > signal(SIGUSR1, handler); > > while(1) > { > asm volatile("std\r\n"); > } > > return 0; >} >
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