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3ca933aad0
- Do not free "head" variable in filter_free_subsystem_filters() The first error path jumps to "free_now" label but first frees the newly allocated "head" variable. But the "free_now" code checks this variable, and if it is not NULL, it will iterate the list. As this list variable was already initialized, the "free_now" code will not do anything as it is empty. But freeing it will cause a UAF bug. The error path should simply jump to the "free_now" label and leave the "head" variable alone. -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCaExH8RQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qs+DAQDWBAAmviDcMb+e+9uZi8rR8+Aj+j5S efPe/g4D2otl5QD/T7u5TZFrSOZfl4Gv9Z1ZWhKj+xfw3FiphODrzHdcsgo= =eP9r -----END PGP SIGNATURE----- Merge tag 'trace-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fix from Steven Rostedt: - Do not free "head" variable in filter_free_subsystem_filters() The first error path jumps to "free_now" label but first frees the newly allocated "head" variable. But the "free_now" code checks this variable, and if it is not NULL, it will iterate the list. As this list variable was already initialized, the "free_now" code will not do anything as it is empty. But freeing it will cause a UAF bug. The error path should simply jump to the "free_now" label and leave the "head" variable alone. * tag 'trace-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing: Do not free "head" on error path of filter_free_subsystem_filters() |
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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 reStructuredText 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.