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SubjectRe: [EXT4 set 5][PATCH 1/1] expand inode i_extra_isize to support features in larger inode
On Jul 16, 2007  16:52 -0700, Mingming Cao wrote:
> I am not sure why we need GFP_KERNEL flag here. I think we should use
> GFP_NOFS instead. The following patch use the GFP_NOFS flag, as well as
> fixing memory leak issue introduced by the ext4 expand inode extra isize
> patch.
>
> Fixing memory allocation issue with expand inode extra isize patch.
>
> - use GFP_NOFS instead of GFP_KERNEL flag for memory allocation
> - use kzalloc instead of kmalloc

This doesn't need kzalloc() for buffer and b_entry_name, since they are
immediately overwritten by memcpy().

> - fix memory leak in the success case, at the end of while loop.
> goto cleanup;
> @@ -1302,7 +1302,15 @@ retry:
> error = ext4_xattr_block_set(handle, inode, &i, bs);
> if (error)
> goto cleanup;
> + kfree(b_entry_name);
> + kfree(buffer);
> + brelse(is->iloc.bh);
> + kfree(is);
> + kfree(bs);
> + brelse(bh);
> }
> + up_write(&EXT4_I(inode)->xattr_sem);
> + return 0;
>
> cleanup:
> kfree(b_entry_name);

I don't think you should have brelse(bh) inside the loop, since it is
allocated before the loop starts.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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