crypto: af_alg - whitelist mask and type

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commit bb30b8848c upstream.

The user space interface allows specifying the type and mask field used
to allocate the cipher. Only a subset of the possible flags are intended
for user space. Therefore, white-list the allowed flags.

In case the user space caller uses at least one non-allowed flag, EINVAL
is returned.

Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Stephan Mueller 2018-01-02 08:55:25 +01:00 • committed by Greg Kroah-Hartman

parent 66ae99ca89

commit cc5daa4b69

1 changed files with 6 additions and 4 deletions

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crypto/af_alg.c

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