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Red Hat Bugzilla – Attachment 159853 Details for
Bug 249409
Mapping guest pages can crash Dom0
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Simple test program to map and read arbitrary mfns
crash249409.c (text/x-csrc), 741 bytes, created by
Markus Armbruster
on 2007-07-24 14:56:26 UTC
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Description:
Simple test program to map and read arbitrary mfns
Filename:
MIME Type:
Creator:
Markus Armbruster
Created:
2007-07-24 14:56:26 UTC
Size:
741 bytes
patch
obsolete
>#include <stdio.h> >#include <stdlib.h> >#include <sys/mman.h> >#include <xenctrl.h> > >int >main(int argc, char *argv[]) >{ > int n, i, xc; > unsigned domid; > unsigned long *mfn; > unsigned long *p; > > if (argc < 3) { > fprintf(stderr, "Usage: %s domid mfn...\n", argv[0]); > exit(1); > } > domid = strtoul(argv[1], NULL, 0); > n = argc - 2; > mfn = malloc(n * sizeof(*mfn)); > for (i = 1; i < argc; i++) > mfn[i] = strtoul(argv[i], NULL, 0); > > xc = xc_interface_open(); > if (xc == -1) { > perror("open"); > exit(1); > } > p = xc_map_foreign_batch(xc, domid, PROT_READ | PROT_WRITE, mfn, n); > if (!p) { > perror("map"); > exit(1); > } > > for (i = 0; i < 4096 / sizeof(unsigned long); i++) > printf(" %lu", p[i]); > munmap(p, n * 4096); > free(mfn); > return 0; >}
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