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While processing a path record entry in CM messages the associated GID attribute is now also supplied. Currently for RoCE a netdevice's net namespace pointer and ifindex are stored in path record entry. Both of these fields of the netdev can change anytime while processing CM messages. Additionally storing net namespace without holding reference will lead to use-after-free crash. Therefore it is removed. Netdevice information for RoCE is instead provided via referenced gid attribute in ib_cm requests. Such a design leads to a situation where the kernel can crash when the net pointer becomes invalid. However today it is always initialized to init_net, which cannot become invalid. In order to support processing packets in any arbitrary namespace of the received packet, it is necessary to avoid such conditions. This patch removes the dependency on the net pointer and ifindex; instead it will rely on SGID attribute which contains a pointer to netdev. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.