Comment on MongoBleed explained simply | MongoDB exploit

rothaine@lemmy.zip ⁨2⁩ ⁨weeks⁩ ago

• qaz@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  Doesn’t that make it slower because it needs to zero out all the bytes first?

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  • rothaine@lemmy.zip ⁨2⁩ ⁨weeks⁩ ago

    My understanding is that it’s only slightly slower: the OS maintains a pool of zeroed pages anyway, so it’s not like your program has to iterate over all the addresses and write to them.

    But it’s been a long time since I’ve done any C/C++ so I could be wrong.

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    • qaz@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

      the OS maintains a pool of zeroed pages

      TIL, I didn’t know that.

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