linux-kernel - Re: [PATCH] mtd: nand: Fix memory allocation in nanddev_bbt

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:   Wed, 28 Nov 2018 14:55:45 +0000
From:   Schrempf Frieder <frieder.schrempf@...tron.de>
To:     Boris Brezillon <boris.brezillon@...tlin.com>
CC:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "David Woodhouse" <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: nand: Fix memory allocation in nanddev_bbt_init()

Hi Boris,

On 28.11.18 15:41, Boris Brezillon wrote:
> On Tue, 27 Nov 2018 07:44:52 +0000
> Schrempf Frieder <frieder.schrempf@...tron.de> wrote:
> 
>> Fix the size of the buffer allocated to store the in-memory BBT.
>> This bug was previously hidden by a different bug, that was fixed in
>> d098093ba06e.
>>
>> Fixes: 9c3736a3de21 ("mtd: nand: Add core infrastructure to deal with NAND devices")
>> Cc: <stable@...r.kernel.org>
>> Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
> 
> Looks like your From header does not match the SoB tag
> ('Frieder Schrempf' vs 'Schrempf Frieder') and checkpatch does not like
> that. I'll fix it when applying, but maybe you should fix
> your .gitconfig to make them match.

Actually the From header in my local patch is correct (<first name> 
<last name>, Frieder Schrempf) as it comes from my git config. But since 
our company was renamed and our mail servers were transferred, our 
e-mails are sent with From=<last name> <first name>.

It seems like git send-email or patchwork or whatever uses the 
information from the e-mail header instead of what is in the patch.

I will try to raise this issue with our IT department as this would be 
best fixed on their side.

Thanks,
Frieder

> 
>> ---
>>   drivers/mtd/nand/bbt.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c
>> index 56cde38..c12497f 100644
>> --- a/drivers/mtd/nand/bbt.c
>> +++ b/drivers/mtd/nand/bbt.c
>> @@ -27,7 +27,8 @@ int nanddev_bbt_init(struct nand_device *nand)
>>   	unsigned int nwords = DIV_ROUND_UP(nblocks * bits_per_block,
>>   					   BITS_PER_LONG);
>>   
>> -	nand->bbt.cache = kzalloc(nwords, GFP_KERNEL);
>> +	nand->bbt.cache = kzalloc(nwords * (BITS_PER_LONG / BITS_PER_BYTE),
>> +				  GFP_KERNEL);
>>   	if (!nand->bbt.cache)
>>   		return -ENOMEM;
>>   
>