Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices:
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db3fa27102
__in6_dev_get(dev) called from inet6_set_link_af() can return NULL.
The needed check has been recently removed, let's add it back.
While do_setlink() does call validate_linkmsg() :
...
err = validate_linkmsg(dev, tb); /* OK at this point */
...
It is possible that the following call happening before the
->set_link_af() removes IPv6 if MTU is less than 1280 :
if (tb[IFLA_MTU]) {
err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
if (err < 0)
goto errout;
status |= DO_SETLINK_MODIFIED;
}
...
if (tb[IFLA_AF_SPEC]) {
...
err = af_ops->set_link_af(dev, af);
->inet6_set_link_af() // CRASH because idev is NULL
Please note that IPv4 is immune to the bug since inet_set_link_af() does :
struct in_device *in_dev = __in_dev_get_rcu(dev);
if (!in_dev)
return -EAFNOSUPPORT;
This problem has been mentioned in commit
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.
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.