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Filename Latest commit message Latest commit date
Daniel Borkmann f7fbedc909 bpf: Ensure off_reg has no mixed signed bounds for all types
commit 24c109bb1537c12c02aeed2d51a347b4d6a9b76e upstream.

The mixed signed bounds check really belongs into retrieve_ptr_limit()
instead of outside of it in adjust_ptr_min_max_vals(). The reason is
that this check is not tied to PTR_TO_MAP_VALUE only, but to all pointer
types that we handle in retrieve_ptr_limit() and given errors from the latter
propagate back to adjust_ptr_min_max_vals() and lead to rejection of the
program, it's a better place to reside to avoid anything slipping through
for future types. The reason why we must reject such off_reg is that we
otherwise would not be able to derive a mask, see details in 9d7eceede7
("bpf: restrict unknown scalars of mixed signed bounds for unprivileged").

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
[fllinden@amazon.com: backport to 5.4]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-02 11:05:03 +02:00
arch x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access 2021-04-28 13:19:16 +02:00
block
certs
crypto
Documentation
drivers USB: CDC-ACM: fix poison/unpoison imbalance 2021-04-28 13:19:16 +02:00
fs readdir: make sure to verify directory entry for legacy interfaces too 2021-04-21 12:56:16 +02:00
include gpio: omap: Save and restore sysconfig 2021-04-28 13:19:14 +02:00
init
ipc
kernel bpf: Ensure off_reg has no mixed signed bounds for all types 2021-05-02 11:05:03 +02:00
lib
LICENSES
mm
net gro: ensure frag0 meets IP header alignment 2021-04-21 12:56:17 +02:00
samples
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sound
tools ia64: tools: remove duplicate definition of ia64_mf() on ia64 2021-04-28 13:19:16 +02:00
usr
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Makefile Linux 5.4.115 2021-04-28 13:19:16 +02:00
README

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.