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57b0e31453
We need to check the return value of match_token() for Opt_err before doing anything with it. [ Not only did the old "-1" value for Opt_err cause problems for the __test_and_set_bit(), as fixed in commit94c13f66e1("security: don't use a negative Opt_err token index"), but accessing "args[0].from" is invalid for the Opt_err case, as pointed out by Eric later. - Linus ] Reported-by: syzbot+a22e0dc07567662c50bc@syzkaller.appspotmail.com Fixes:00d60fd3b9("KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]") Signed-off-by: Eric Biggers <ebiggers@google.com> Cc: stable@kernel.org # 4.20 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.