linux-kernel - Re: [PATCH] RDMA/bnxt_re/qplib_res: Fix a double free in bnxt_qplib_alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20210427183159.GB3246473@nvidia.com>
Date:   Tue, 27 Apr 2021 15:31:59 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Lv Yunlong <lyl2019@...l.ustc.edu.cn>
Cc:     selvin.xavier@...adcom.com, devesh.sharma@...adcom.com,
        somnath.kotur@...adcom.com, sriharsha.basavapatna@...adcom.com,
        nareshkumar.pbs@...adcom.com, dledford@...hat.com,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/bnxt_re/qplib_res: Fix a double free in
 bnxt_qplib_alloc_res

On Mon, Apr 26, 2021 at 07:06:14AM -0700, Lv Yunlong wrote:
> In bnxt_qplib_alloc_res, it calls bnxt_qplib_alloc_dpi_tbl().
> Inside bnxt_qplib_alloc_dpi_tbl, dpit->dbr_bar_reg_iomem is freed via
> pci_iounmap() in unmap_io error branch. After the callee returns err code,
> bnxt_qplib_alloc_res calls bnxt_qplib_free_res()->bnxt_qplib_free_dpi_tbl()
> in fail branch. Then dpit->dbr_bar_reg_iomem is freed in the second time by
> pci_iounmap().
> 
> My patch set dpit->dbr_bar_reg_iomem to NULL after it is freed by pci_iounmap()
> in the first time, to avoid the double free.
> 
> Fixes: 1ac5a40479752 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
> Signed-off-by: Lv Yunlong <lyl2019@...l.ustc.edu.cn>
> Reviewed-by: Leon Romanovsky <leonro@...dia.com>
> Acked-By: Devesh Sharma <devesh.sharma@...adcom.com>
> ---
>  drivers/infiniband/hw/bnxt_re/qplib_res.c | 1 +
>  1 file changed, 1 insertion(+)

Applied to for-next, thanks

Jason