Re: report bug: System reboots when accessing a loop-device over a second loop-device with 2.4.2-ac7

From: Jens Axboe (axboe@suse.de)
Date: Fri Mar 02 2001 - 22:19:22 EST


On Fri, Mar 02 2001, Mario Hermann wrote:
> But with old 2.2 - Material stored on DVD-RAM.
>
> losetup -e blowfish /dev/loop0 /dev/sr3
> lsoetup -e serpent /dev/loop1 /dev/loop0
>
> it doesn't work.

(replied to Mario earlier, for reference here's the patch).

Yet another miscount and IV off, I apparently missed the latter
when the other IV calculations were fixed. I've verified block
crypto here now.

-- 
Jens Axboe

--- /opt/kernel/linux-2.4.2-ac10/drivers/block/loop.c Sat Mar 3 04:16:23 2001 +++ drivers/block/loop.c Sat Mar 3 04:18:54 2001 @@ -345,8 +345,6 @@ struct buffer_head *rbh = bh->b_private; rbh->b_end_io(rbh, uptodate); - if (atomic_dec_and_test(&lo->lo_pending)) - up(&lo->lo_bh_mutex); loop_put_buffer(bh); } else loop_add_bh(lo, bh); @@ -479,6 +477,7 @@ IV = (bh->b_rsector / (bh->b_size >> 9)); IV += lo->lo_offset / bh->b_size; + IV >>= 2; ret = lo_do_transfer(lo, READ, bh->b_data, rbh->b_data, bh->b_size, IV);

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This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:13 EST