linux-kernel - Re: [PATCH v4 3/6] fat: zero out seek range on _fat_get

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, 18 Mar 2014 23:59:14 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Namjae Jeon <linkinjeon@...il.com>
Cc:	akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [PATCH v4 3/6] fat: zero out seek range on _fat_get_block

Namjae Jeon <linkinjeon@...il.com> writes:

> +static void check_fallocated_region(struct inode *inode, sector_t iblock,
> +		unsigned long *max_blocks, struct buffer_head *bh_result)
> +{
> +	struct super_block *sb = inode->i_sb;
> +	sector_t last_block, disk_block;
> +	const unsigned long blocksize = sb->s_blocksize;
> +	const unsigned char blocksize_bits = sb->s_blocksize_bits;
> +
> +	last_block = (MSDOS_I(inode)->mmu_private + (blocksize - 1))
> +		>> blocksize_bits;
> +	disk_block = (MSDOS_I(inode)->i_disksize + (blocksize - 1))
> +		>> blocksize_bits;
> +	if (iblock >= last_block && iblock <= disk_block) {

Maybe off-by-one error. If iblock == disk_block, phys should not be set
by fat_bmap()?
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
--
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/