** Changed in: ubuntu-z-systems
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1584828
Title:
s390/pci: fix use after free in dma_init
Status in Ubuntu on IBM z Systems:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Yakkety:
Fix Released
Bug description:
== Comment: #0 - Hendrik Brueckner <[email protected]> - 2016-05-23
09:09:00 ==
Please backport upstream Linux commit ID:
commit dba599091c191d209b1499511a524ad9657c0e5a
Author: Sebastian Ott <[email protected]>
Date: Fri Apr 15 09:41:35 2016 +0200
s390/pci: fix use after free in dma_init
After a failure during registration of the dma_table (because of the
function being in error state) we free its memory but don't reset the
associated pointer to zero.
When we then receive a notification from firmware (about the function
being in error state) we'll try to walk and free the dma_table again.
Fix this by resetting the dma_table pointer. In addition to that make
sure that we free the iommu_bitmap when appropriate.
Signed-off-by: Sebastian Ott <[email protected]>
Reviewed-by: Gerald Schaefer <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
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