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powerpc/pseries: Fix potential memleak in papr_get_attr()
[ Upstream commit cda9c0d556283e2d4adaa9960b2dc19b16156bae ] `buf` is allocated in papr_get_attr(), and krealloc() of `buf` could fail. We need to free the original `buf` in the case of failure. Fixes: 3c14b73 ("powerpc/pseries: Interface to represent PAPR firmware attributes") Signed-off-by: Qiheng Lin <linqiheng@huawei.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20221208133449.16284-1-linqiheng@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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