virtio-blk: fail unaligned requests

Like all block drivers virtio-blk should not allow small than block size
granularity access.  But given that the protocol specifies a
byte unit length field we currently accept such requests, which cause
qemu to abort() in lower layers.  Add checks to the main read and
write handlers to catch them early.

Reported-by: Conor Murphy <conor_murphy_virt@hotmail.com>
Tested-by: Conor Murphy <conor_murphy_virt@hotmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
1 file changed
tree: 4f1f58fc9239da7f0f55706d252e31841e1fe393
  1. audio/
  2. block/
  3. bsd-user/
  4. darwin-user/
  5. default-configs/
  6. docs/
  7. fpu/
  8. fsdev/
  9. gdb-xml/
  10. hw/
  11. linux-user/
  12. net/
  13. pc-bios/
  14. QMP/
  15. roms/
  16. scripts/
  17. slirp/
  18. sysconfigs/
  19. target-alpha/
  20. target-arm/
  21. target-cris/
  22. target-i386/
  23. target-m68k/
  24. target-microblaze/
  25. target-mips/
  26. target-ppc/
  27. target-s390x/
  28. target-sh4/
  29. target-sparc/
  30. tcg/
  31. tests/
  32. ui/
  33. .gitignore
  34. .gitmodules
  35. a.out.h
  36. acl.c
  37. acl.h
  38. aes.c
  39. aes.h
  40. aio.c
  41. alpha-dis.c
  42. alpha.ld
  43. arch_init.c
  44. arch_init.h
  45. arm-dis.c
  46. arm-semi.c
  47. arm.ld
  48. async.c
  49. balloon.c
  50. balloon.h
  51. block-migration.c
  52. block-migration.h
  53. block.c
  54. block.h
  55. block_int.h
  56. blockdev.c
  57. blockdev.h
  58. bswap.h
  59. bt-host.c
  60. bt-host.h
  61. bt-vhci.c
  62. buffered_file.c
  63. buffered_file.h
  64. cache-utils.c
  65. cache-utils.h
  66. Changelog
  67. check-qdict.c
  68. check-qfloat.c
  69. check-qint.c
  70. check-qjson.c
  71. check-qlist.c
  72. check-qstring.c
  73. cmd.c
  74. cmd.h
  75. CODING_STYLE
  76. compatfd.c
  77. compatfd.h
  78. config.h
  79. configure
  80. console.c
  81. console.h
  82. COPYING
  83. COPYING.LIB
  84. cpu-all.h
  85. cpu-common.h
  86. cpu-defs.h
  87. cpu-exec.c
  88. cpus.c
  89. cpus.h
  90. cris-dis.c
  91. cursor.c
  92. cursor_hidden.xpm
  93. cursor_left_ptr.xpm
  94. cutils.c
  95. def-helper.h
  96. device_tree.c
  97. device_tree.h
  98. dis-asm.h
  99. disas.c
  100. disas.h
  101. dma-helpers.c
  102. dma.h
  103. dyngen-exec.h
  104. elf.h
  105. envlist.c
  106. envlist.h
  107. exec-all.h
  108. exec.c
  109. gdbstub.c
  110. gdbstub.h
  111. gen-icount.h
  112. HACKING
  113. hmp-commands.hx
  114. host-utils.c
  115. host-utils.h
  116. hpet.h
  117. hppa-dis.c
  118. hppa.ld
  119. i386-dis.c
  120. i386.ld
  121. ia64-dis.c
  122. ia64.ld
  123. input.c
  124. ioport-user.c
  125. ioport.c
  126. ioport.h
  127. iorange.h
  128. iov.c
  129. iov.h
  130. json-lexer.c
  131. json-lexer.h
  132. json-parser.c
  133. json-parser.h
  134. json-streamer.c
  135. json-streamer.h
  136. kvm-all.c
  137. kvm-stub.c
  138. kvm.h
  139. libfdt_env.h
  140. LICENSE
  141. linux-aio.c
  142. m68k-dis.c
  143. m68k-semi.c
  144. m68k.ld
  145. MAINTAINERS
  146. Makefile
  147. Makefile.dis
  148. Makefile.hw
  149. Makefile.objs
  150. Makefile.target
  151. Makefile.user
  152. microblaze-dis.c
  153. migration-exec.c
  154. migration-fd.c
  155. migration-tcp.c
  156. migration-unix.c
  157. migration.c
  158. migration.h
  159. mips-dis.c
  160. mips.ld
  161. module.c
  162. module.h
  163. monitor.c
  164. monitor.h
  165. nbd.c
  166. nbd.h
  167. net-checksum.c
  168. net.c
  169. net.h
  170. notify.c
  171. notify.h
  172. os-posix.c
  173. os-win32.c
  174. osdep.c
  175. osdep.h
  176. oslib-posix.c
  177. oslib-win32.c
  178. path.c
  179. pci-ids.txt
  180. pflib.c
  181. pflib.h
  182. poison.h
  183. posix-aio-compat.c
  184. ppc-dis.c
  185. ppc.ld
  186. ppc64.ld
  187. qbool.c
  188. qbool.h
  189. qdict-test-data.txt
  190. qdict.c
  191. qdict.h
  192. qemu-aio.h
  193. qemu-barrier.h
  194. qemu-char.c
  195. qemu-char.h
  196. qemu-common.h
  197. qemu-config.c
  198. qemu-config.h
  199. qemu-doc.texi
  200. qemu-error.c
  201. qemu-error.h
  202. qemu-img-cmds.hx
  203. qemu-img.c
  204. qemu-img.texi
  205. qemu-io.c
  206. qemu-lock.h
  207. qemu-log.h
  208. qemu-malloc.c
  209. qemu-nbd.c
  210. qemu-nbd.texi
  211. qemu-objects.h
  212. qemu-option.c
  213. qemu-option.h
  214. qemu-options.h
  215. qemu-options.hx
  216. qemu-os-posix.h
  217. qemu-os-win32.h
  218. qemu-queue.h
  219. qemu-sockets.c
  220. qemu-tech.texi
  221. qemu-thread.c
  222. qemu-thread.h
  223. qemu-timer-common.c
  224. qemu-timer.c
  225. qemu-timer.h
  226. qemu-tool.c
  227. qemu-x509.h
  228. qemu.sasl
  229. qemu_socket.h
  230. qerror.c
  231. qerror.h
  232. qfloat.c
  233. qfloat.h
  234. qint.c
  235. qint.h
  236. qjson.c
  237. qjson.h
  238. qlist.c
  239. qlist.h
  240. qmp-commands.hx
  241. qobject.h
  242. qstring.c
  243. qstring.h
  244. range.h
  245. readline.c
  246. readline.h
  247. README
  248. rules.mak
  249. rwhandler.c
  250. rwhandler.h
  251. s390-dis.c
  252. s390.ld
  253. savevm.c
  254. sh4-dis.c
  255. simpletrace.c
  256. simpletrace.h
  257. softmmu-semi.h
  258. softmmu_defs.h
  259. softmmu_exec.h
  260. softmmu_header.h
  261. softmmu_template.h
  262. sparc-dis.c
  263. sparc.ld
  264. sparc64.ld
  265. spice-qemu-char.c
  266. sysemu.h
  267. targphys.h
  268. tcg-runtime.c
  269. thunk.c
  270. thunk.h
  271. TODO
  272. trace-events
  273. translate-all.c
  274. uboot_image.h
  275. usb-bsd.c
  276. usb-linux.c
  277. usb-stub.c
  278. VERSION
  279. version.rc
  280. vgafont.h
  281. vl.c
  282. x86_64.ld