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Ravi Bangoria
aaf2712f76
[ Upstream commit723a290326] Commit50a53b60e1("perf/amd/ibs: Prevent leaking sensitive data to userspace") zeroed the physical address and also cleared the PhyAddrVal flag before copying the value into a perf sample to avoid exposing physical addresses to unprivileged users. Clearing PhyAddrVal, however, has an unintended side-effect: several other IBS fields are considered valid only when this bit is set. As a result, those otherwise correct fields are discarded, reducing IBS functionality. Continue to zero the physical address, but keep the PhyAddrVal bit intact so the related fields remain usable while still preventing any address leak. Fixes:50a53b60e1("perf/amd/ibs: Prevent leaking sensitive data to userspace") Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: https://patch.msgid.link/20260216042216.1440-4-ravi.bangoria@amd.com 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 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.