linux-kernel - fs/btrfs/inode.c:6039: warning: ‘bio’ is used uninitialized in this function

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Message-ID: <BANLkTi=zNkSkD7L8f0pkZ2+j5pGcGhCYJA@mail.gmail.com>
Date:	Tue, 19 Apr 2011 13:00:30 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Josef Bacik <josef@...hat.com>,
	Chris Mason <chris.mason@...cle.com>
Cc:	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: fs/btrfs/inode.c:6039: warning: ‘bio’ is used uninitialized in this function

fs/btrfs/inode.c: In function ‘btrfs_submit_direct_hook’:
fs/btrfs/inode.c:6039: warning: ‘bio’ is used uninitialized in this function

`BIO_BUG_ON(!atomic_read(&bio->bi_cnt))' in bio_put() later will blow up nicely
when passed a random pointer on the stack.

Introduced by commit 02f57c7aedef1a537f4b16db7061cdd8efa3bb4e
("Btrfs: don't split dio bios if we don't have to").

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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