linux-kernel - Re: [PATCH net-next v2 RESEND] BNX2: fix a Null Pointer for stats

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

Date:	Tue, 29 Sep 2015 21:10:11 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	wangweidong1@...wei.com
Cc:	sony.chacko@...gic.com, Dept-HSGLinuxNICDev@...gic.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	rui.xiang@...wei.com, manish.chopra@...gic.com
Subject: Re: [PATCH net-next v2 RESEND] BNX2: fix a Null Pointer for
 stats_blk

From: Weidong Wang <wangweidong1@...wei.com>
Date: Tue, 29 Sep 2015 11:18:18 +0800

> @@ -839,11 +828,12 @@ bnx2_free_mem(struct bnx2 *bp)
>  }
> 
>  static int
> -bnx2_alloc_mem(struct bnx2 *bp)
> +bnx2_alloc_stats_blk(struct net_device *dev)
>  {
> -	int i, status_blk_size, err;
> +	int i, status_blk_size;
>  	struct bnx2_napi *bnapi;
>  	void *status_blk;
> +	struct bnx2 *bp = netdev_priv(dev);
> 
>  	/* Combine status and statistics blocks into one allocation. */
>  	status_blk_size = L1_CACHE_ALIGN(sizeof(struct status_block));

This function is not just allocating the stats block, it's allocating
a whole bunch of other things too.

Only allocate the stats block at probe time, not the NAPI et al. stuff
as well.  That can safely stay in the open/close paths.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/