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Author	SHA1	Message	Date
Sakthipriyan Vairamani (thefourtheye)	f83d035c50	buffer: convert offset & length to int properly As per ecma-262 2015's #sec-%typedarray%-buffer-byteoffset-length, `offset` would be an integer, not a 32 bit unsigned integer. Also, `length` would be an integer with the maximum value of 2^53 - 1, not a 32 bit unsigned integer. This would be a problem because, if we create a buffer from an arraybuffer, from an offset which is greater than 2^32, it would be actually pointing to a different location in arraybuffer. For example, if we use 2^40 as offset, then the actual value used will be 0, because `byteOffset >>>= 0` will convert `byteOffset` to a 32 bit unsigned int, which is based on 2^32 modulo. This is a redo, as the `ca37fa527f` broke CI. Refer: https://github.com/nodejs/node/pull/9814 Refer: https://github.com/nodejs/node/pull/9492 PR-URL: https://github.com/nodejs/node/pull/9815 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Backport-Of: https://github.com/nodejs/node/pull/9815 PR-URL: https://github.com/nodejs/node/pull/11176 Reviewed-By: James M Snell <jasnell@gmail.com>	8 years ago

Sakthipriyan Vairamani (thefourtheye)

f83d035c50

buffer: convert offset & length to int properly

As per ecma-262 2015's #sec-%typedarray%-buffer-byteoffset-length,
  `offset` would be an integer, not a 32 bit unsigned integer. Also,
  `length` would be an integer with the maximum value of 2^53 - 1, not a
  32 bit unsigned integer.

  This would be a problem because, if we create a buffer from an
  arraybuffer, from an offset which is greater than 2^32, it would be
  actually pointing to a different location in arraybuffer. For example,
  if we use 2^40 as offset, then the actual value used will be 0,
  because `byteOffset >>>= 0` will convert `byteOffset` to a 32 bit
  unsigned int, which is based on 2^32 modulo.

  This is a redo, as the ca37fa527f broke
  CI.

  Refer: https://github.com/nodejs/node/pull/9814
  Refer: https://github.com/nodejs/node/pull/9492

  PR-URL: https://github.com/nodejs/node/pull/9815

  Reviewed-By: Michaël Zasso <targos@protonmail.com>
  Reviewed-By: Trevor Norris <trev.norris@gmail.com>
  Reviewed-By: James M Snell <jasnell@gmail.com>
  Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
  Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

Backport-Of: https://github.com/nodejs/node/pull/9815
PR-URL: https://github.com/nodejs/node/pull/11176
Reviewed-By: James M Snell <jasnell@gmail.com>

8 years ago

1 Commits (c7436df8892d5a9e8aea100731541843ec71ebfa)