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authorHerbert Xu <herbert@gondor.apana.org.au>2019-09-06 13:13:06 +1000
committerHerbert Xu <herbert@gondor.apana.org.au>2019-09-09 17:35:27 +1000
commit0ba3c026e685573bd3534c17e27da7c505ac99c4 (patch)
tree62a5c9b06044d73c4b004c2000ec87b24c319a36 /arch/m68k/Kconfig
parent7b865ec15ed3a1a4204537bc28bbc68202f4c52f (diff)
crypto: skcipher - Unmap pages after an external error
skcipher_walk_done may be called with an error by internal or external callers. For those internal callers we shouldn't unmap pages but for external callers we must unmap any pages that are in use. This patch distinguishes between the two cases by checking whether walk->nbytes is zero or not. For internal callers, we now set walk->nbytes to zero prior to the call. For external callers, walk->nbytes has always been non-zero (as zero is used to indicate the termination of a walk). Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: 5cde0af2a982 ("[CRYPTO] cipher: Added block cipher type") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/m68k/Kconfig')
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