f4aa8268d7
[ Upstream commit a78cae2476812cecaa4a33d0086bbb53986906bc ] xdp_rxq_info_unreg() implicitly calls xdp_rxq_info_unreg_mem_model(). This may well be confusing to the driver authors, and lead to double free if they call xdp_rxq_info_unreg_mem_model() before xdp_rxq_info_unreg() (when mem model type == MEM_TYPE_PAGE_POOL). In fact error path of mvpp2_rxq_init() seems to currently do exactly that. The double free will result in refcount underflow in page_pool_destroy(). Make the interface a little more programmer friendly by clearing type and id so that xdp_rxq_info_unreg_mem_model() can be called multiple times. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210625221612.2637086-1-kuba@kernel.org Stable-dep-of: 7e9f79428372 ("xdp: Remove WARN() from __xdp_reg_mem_model()") Signed-off-by: Sasha Levin <sashal@kernel.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.