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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.