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Date: Sun, 29 Oct 2017 10:20:18 +0300 From: Moni Shoua <monis@...lanox.com> To: Thomas Bogendoerfer <tbogendoerfer@...e.de> Cc: Doug Ledford <dledford@...hat.com>, linux-rdma <linux-rdma@...r.kernel.org>, Linux Kernel Mailinglist <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/2] IB/rxe: don't crash, if allocation of crc algorithm failed On Fri, Oct 27, 2017 at 6:59 PM, Thomas Bogendoerfer <tbogendoerfer@...e.de> wrote: > Following crash happens, if crc algorithm couldn't be allocated: > > [ 1087.989072] rdma_rxe: loaded > [ 1097.855397] PCLMULQDQ-NI instructions are not detected. > [ 1097.901220] rdma_rxe: failed to allocate crc algorithmi err:-2 > [ 1097.901248] BUG: unable to handle kernel > [ 1097.901249] NULL pointer dereference > [ 1097.901250] at 0000000000000046 > [...] > > Reason is that rxe->tfm is assigned the error return, which will then > be used for crypto_free_shash() in rxe_cleanup. Fix by using a > temporay variable and assigning it rxe->tfm after allocation succeeded. > > Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de> Fix looks good only a Fixes line is missing from the commit message. Please add.
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