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[ Upstream commitbdc2ab5c61] In rds_message_map_pages, the rm is freed by rds_message_put(rm). But rm is still used by rm->data.op_sg in return value. My patch assigns ERR_CAST(rm->data.op_sg) to err before the rm is freed to avoid the uaf. Fixes:7dba92037b("net/rds: Use ERR_PTR for rds_message_alloc_sgs()") Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn> Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> 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.