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authorHoria Geantă <horia.geanta@nxp.com>2017-02-10 14:07:23 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2017-02-15 13:23:42 +0800
commit87ec02e7409d787348c244039aa3536a812dfa8b (patch)
tree097f6cd4c4ae13bdcd3e9b98b0a8c5a2b7f3f914 /usr
parentbbf2234494afd14a720d61a233c21b95e4261326 (diff)
crypto: caam - fix error path for ctx_dma mapping failure
In case ctx_dma dma mapping fails, ahash_unmap_ctx() tries to dma unmap an invalid address: map_seq_out_ptr_ctx() / ctx_map_to_sec4_sg() -> goto unmap_ctx -> -> ahash_unmap_ctx() -> dma unmap ctx_dma There is also possible to reach ahash_unmap_ctx() with ctx_dma uninitialzed or to try to unmap the same address twice. Fix these by setting ctx_dma = 0 where needed: -initialize ctx_dma in ahash_init() -clear ctx_dma in case of mapping error (instead of holding the error code returned by the dma map function) -clear ctx_dma after each unmapping Fixes: 32686d34f8fb6 ("crypto: caam - ensure that we clean up after an error") Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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