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authorArd Biesheuvel <ardb@kernel.org>2022-10-20 10:39:08 +0200
committerArd Biesheuvel <ardb@kernel.org>2022-10-24 10:21:02 +0200
commit161a438d730dade2ba2b1bf8785f0759aba4ca5f (patch)
tree08ae9c2b254af749636e5653e9223e04324ea83b /kernel/futex
parentf4cd18c5b2000df0c382f6530eeca9141ea41faf (diff)
downloadlinux-161a438d730dade2ba2b1bf8785f0759aba4ca5f.tar.bz2
efi: random: reduce seed size to 32 bytes
We no longer need at least 64 bytes of random seed to permit the early crng init to complete. The RNG is now based on Blake2s, so reduce the EFI seed size to the Blake2s hash size, which is sufficient for our purposes. While at it, drop the READ_ONCE(), which was supposed to prevent size from being evaluated after seed was unmapped. However, this cannot actually happen, so READ_ONCE() is unnecessary here. Cc: <stable@vger.kernel.org> # v4.14+ Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'kernel/futex')
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