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Message-ID: <1287475049.1705.2.camel@leonhard>
Date: Tue, 19 Oct 2010 16:57:29 +0900
From: Namhyung Kim <namhyung@...il.com>
To: Jan Kara <jack@...e.cz>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Andreas Dilger <adilger.kernel@...ger.ca>,
linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ext3: Check return value of sb_getblk()
2010-10-19 (화), 15:34 +0900, Namhyung Kim:
> Check return value of sb_getblk() is NULL. unlikely is addded here
> since it is called from a loop and we've been OK without the check
> until now.
>
> Signed-off-by: Namhyung Kim <namhyung@...il.com>
> ---
> fs/ext3/inode.c | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
> index ef1c23a..a7ac778 100644
> --- a/fs/ext3/inode.c
> +++ b/fs/ext3/inode.c
> @@ -655,6 +655,12 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
> * parent to disk.
> */
> bh = sb_getblk(inode->i_sb, new_blocks[n-1]);
> + if (unlikely(!bh)) {
> + n--;
> + err = -ENOMEM;
> + goto failed;
> + }
> +
> branch[n].bh = bh;
> lock_buffer(bh);
> BUFFER_TRACE(bh, "call get_create_access");
Maybe EIO would be more proper error code, I guess.
--
Regards,
Namhyung Kim
--
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