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bug#21460: Race condition in tests/tail-2/assert.sh
From: |
Pádraig Brady |
Subject: |
bug#21460: Race condition in tests/tail-2/assert.sh |
Date: |
Sat, 12 Sep 2015 03:22:12 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
On 12/09/15 02:09, Paul Eggert wrote:
> Pádraig Brady wrote:
>> + else if (new_stats.st_nlink == 0) /* XXX: what about multi-linked files.
>> */
>
> That comment was my thought exactly. It appears to be a kernel bug that
> really
> needs to get fixed in the kernel; there just doesn't seem to be a reliable
> workaround in user space.
I double checked with kernel guys, and Al Viro
essentially said the inode and directory operations are independent.
https://lkml.org/lkml/2015/9/11/790
So we probably need to handle the IN_DELETE event
on the directory to cater for this race, as done in:
https://lists.gnu.org/archive/html/coreutils/2015-07/msg00015.html
cheers,
Pádraig.
bug#21459: Race condition in tests/tail-2/assert.sh, Pádraig Brady, 2015/09/11