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qemu / qemu / 8561c9244ddf1122dfe7ccac9b23f506062f1499
commit8561c9244ddf1122dfe7ccac9b23f506062f1499[log] [tgz]
authorMichael S. Tsirkin <mst@redhat.com>Thu Sep 10 16:41:17 2015 +0300
committerMichael S. Tsirkin <mst@redhat.com>Thu Oct 01 16:16:52 2015 +0300
tree80ad18ab7472e7cdc9bab615093c29cd92067cdb
parent9fac18f03a9040b67ec38e14d3e1ed34db9c7e06 [diff]
exec: allocate PROT_NONE pages on top of RAM

This inserts a read and write protected page between RAM and QEMU
memory, for file-backend RAM.
This makes it harder to exploit QEMU bugs resulting from buffer
overflows in devices using variants of cpu_physical_memory_map,
dma_memory_map etc.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed
tree: 80ad18ab7472e7cdc9bab615093c29cd92067cdb
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. crypto/
  6. default-configs/
  7. disas/
  8. docs/
  9. fpu/
  10. fsdev/
  11. gdb-xml/
  12. hw/
  13. include/
  14. libdecnumber/
  15. linux-headers/
  16. linux-user/
  17. migration/
  18. net/
  19. pc-bios/
  20. po/
  21. qapi/
  22. qga/
  23. qobject/
  24. qom/
  25. roms/
  26. scripts/
  27. slirp/
  28. stubs/
  29. target-alpha/
  30. target-arm/
  31. target-cris/
  32. target-i386/
  33. target-lm32/
  34. target-m68k/
  35. target-microblaze/
  36. target-mips/
  37. target-moxie/
  38. target-openrisc/
  39. target-ppc/
  40. target-s390x/
  41. target-sh4/
  42. target-sparc/
  43. target-tilegx/
  44. target-tricore/
  45. target-unicore32/
  46. target-xtensa/
  47. tcg/
  48. tests/
  49. trace/
  50. ui/
  51. util/
  52. dtc
  53. pixman
  54. .exrc
  55. .gitignore
  56. .gitmodules
  57. .mailmap
  58. .travis.yml
  59. accel.c
  60. aio-posix.c
  61. aio-win32.c
  62. arch_init.c
  63. async.c
  64. balloon.c
  65. block.c
  66. blockdev-nbd.c
  67. blockdev.c
  68. blockjob.c
  69. bootdevice.c
  70. bt-host.c
  71. bt-vhci.c
  72. Changelog
  73. CODING_STYLE
  74. configure
  75. COPYING
  76. COPYING.LIB
  77. coroutine-gthread.c
  78. coroutine-sigaltstack.c
  79. coroutine-ucontext.c
  80. coroutine-win32.c
  81. cpu-exec-common.c
  82. cpu-exec.c
  83. cpus.c
  84. cputlb.c
  85. device-hotplug.c
  86. device_tree.c
  87. disas.c
  88. dma-helpers.c
  89. dump.c
  90. exec.c
  91. gdbstub.c
  92. HACKING
  93. hmp-commands-info.hx
  94. hmp-commands.hx
  95. hmp.c
  96. hmp.h
  97. iohandler.c
  98. ioport.c
  99. iothread.c
  100. kvm-all.c
  101. kvm-stub.c
  102. LICENSE
  103. main-loop.c
  104. MAINTAINERS
  105. Makefile
  106. Makefile.objs
  107. Makefile.target
  108. memory.c
  109. memory_mapping.c
  110. module-common.c
  111. monitor.c
  112. nbd.c
  113. numa.c
  114. os-posix.c
  115. os-win32.c
  116. page_cache.c
  117. qapi-schema.json
  118. qdev-monitor.c
  119. qdict-test-data.txt
  120. qemu-bridge-helper.c
  121. qemu-char.c
  122. qemu-coroutine-io.c
  123. qemu-coroutine-lock.c
  124. qemu-coroutine-sleep.c
  125. qemu-coroutine.c
  126. qemu-doc.texi
  127. qemu-ga.texi
  128. qemu-img-cmds.hx
  129. qemu-img.c
  130. qemu-img.texi
  131. qemu-io-cmds.c
  132. qemu-io.c
  133. qemu-log.c
  134. qemu-nbd.c
  135. qemu-nbd.texi
  136. qemu-options-wrapper.h
  137. qemu-options.h
  138. qemu-options.hx
  139. qemu-seccomp.c
  140. qemu-tech.texi
  141. qemu-timer.c
  142. qemu.nsi
  143. qemu.sasl
  144. qjson.c
  145. qmp-commands.hx
  146. qmp.c
  147. qtest.c
  148. README
  149. rules.mak
  150. softmmu_template.h
  151. spice-qemu-char.c
  152. tcg-runtime.c
  153. tci.c
  154. thread-pool.c
  155. thunk.c
  156. tpm.c
  157. trace-events
  158. translate-all.c
  159. translate-all.h
  160. translate-common.c
  161. user-exec.c
  162. VERSION
  163. version.rc
  164. vl.c
  165. xen-common-stub.c
  166. xen-common.c
  167. xen-hvm-stub.c
  168. xen-hvm.c
  169. xen-mapcache.c