On 30 January 2018 at 15:58, Kamil Dudka kdudka@redhat.com wrote:
On Tuesday, January 30, 2018 3:01:54 AM CET Yousong Zhou wrote:
On 30 January 2018 at 02:58, Kamil Dudka kdudka@redhat.com wrote:
On Wednesday, January 24, 2018 1:18:35 PM CET Yousong Zhou wrote:
This can be triggered by using month sort
The issue with the original code is that after the call to mbsrtowcs() and wcsrtombs() returns, the source pointer will be set to NULL causing the later free() call has no effect at all
The issue also exists in c6 branch
Thank you for sharing the patch! This was tracked as Fedora bug #1259942:
https://bugzilla.redhat.com/1259942
The bug was fixed in coreutils-8.23-11.fc22 and it is going to be fixed in the next major version of RHEL (and CentOS).
Kamil
Hi Kamil. I thought there must exist some kind of mechanism for backporting bugfixes of this kind into currently maintained versions. It should! It's an old bug already known and fixed in 2015 and still people are wasting time and getting frustrated by it in 2018!
yousongSorry to hear that. We do not backport non-critical fixes from Fedora to RHEL proactively. Updates in RHEL are primarily driven by requests of Red Hat's customers.
I have cloned the bug for RHEL-7 to get this fixed eventually:
https://bugzilla.redhat.com/1540059
Unfortunately, I cannot guarantee any schedule for merging the fix. If you are a customer of Red Hat, please contact the product support and tell them about this bug.
Kamil
Thanks for doing this.
I encountered this bug when I was using sort to --merge multiple log files with month fields of the form Jan, Feb etc. It caused the kernel to oom which was unexpected since the very merge sort should run in linear time complexity with fixed amount of memory.
yousong