linux-ext4 - ext4_mb_mark_diskspace_used() NULL dereference

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Message-ID: <20080202211658.GH9375@cs181133002.pp.htv.fi>
Date:	Sat, 2 Feb 2008 23:16:58 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Alex Tomas <alex@...sterfs.com>
Cc:	linux-ext4@...r.kernel.org
Subject: ext4_mb_mark_diskspace_used() NULL dereference

The Coverity checker spotted the following NULL dereference:

<--  snip  -->

...
static int ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
                                handle_t *handle)
{
...
        if (!bitmap_bh)
                goto out_err;
...
out_err:
        sb->s_dirt = 1;
        put_bh(bitmap_bh);
...

<--  snip  -->

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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