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Groups > linux.kernel > #1667735

Re: Crypto Fixes for 4.12

From Theodore Ts'o <tytso@mit.edu>
Newsgroups linux.kernel
Subject Re: Crypto Fixes for 4.12
Date 2017-06-16 15:00 +0200
Message-ID <tSZ0Z-8T-9@gated-at.bofh.it> (permalink)
References <tQ1Vo-2mY-19@gated-at.bofh.it> <tSriG-3Uo-7@gated-at.bofh.it> <tSyWR-yc-13@gated-at.bofh.it> <tSEzg-42O-3@gated-at.bofh.it>
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On Thu, Jun 15, 2017 at 11:01:18AM -0400, David Miller wrote:
> As a side note, ext4 does something similar with a private
> implementation, but it doesn't use something the evaluates to an
> alloca.  Instead it uses a fixed 4-byte size for the shash context
> value in the on-stack declaration.

In ext4's case, we're doing it inside an inline function, and then
using the "return" value from inside the calling function.  Assuming
that gcc actually inlines the function, are we in danger of tripping
over the bug?

						- Ted

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Thread

Crypto Fixes for 4.12 Herbert Xu <herbert@gondor.apana.org.au> - 2017-06-08 11:30 +0200
  Re: Crypto Fixes for 4.12 David Miller <davem@davemloft.net> - 2017-06-08 16:10 +0200
    Re: Crypto Fixes for 4.12 Herbert Xu <herbert@gondor.apana.org.au> - 2017-06-09 05:00 +0200
  Crypto Fixes for 4.12 Herbert Xu <herbert@gondor.apana.org.au> - 2017-06-15 03:00 +0200
    Re: Crypto Fixes for 4.12 Linus Torvalds <torvalds@linux-foundation.org> - 2017-06-15 11:10 +0200
      Re: Crypto Fixes for 4.12 Linus Torvalds <torvalds@linux-foundation.org> - 2017-06-15 11:10 +0200
      Re: Crypto Fixes for 4.12 Herbert Xu <herbert@gondor.apana.org.au> - 2017-06-15 11:50 +0200
        Re: Crypto Fixes for 4.12 David Miller <davem@davemloft.net> - 2017-06-15 17:10 +0200
      Re: Crypto Fixes for 4.12 David Miller <davem@davemloft.net> - 2017-06-15 17:10 +0200
        Re: Crypto Fixes for 4.12 Theodore Ts'o <tytso@mit.edu> - 2017-06-16 15:00 +0200
          Re: Crypto Fixes for 4.12 David Miller <davem@davemloft.net> - 2017-06-16 19:00 +0200

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