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Filename Latest commit message Latest commit date
Lukas Wunner 11bb6ae21c spi: lpspi: Fix use-after-free on unbind 
commit 4def49da620c84a682d9361d6bef0a97eed46fe0 upstream.

Normally the last reference on an spi_controller is released by
spi_unregister_controller().  In the case of the i.MX lpspi driver,
the spi_controller is registered with devm_spi_register_controller(),
so spi_unregister_controller() is invoked automatically after the driver
has unbound.

However the driver already releases the last reference in
fsl_lpspi_remove() through a gratuitous call to spi_master_put(),
causing a use-after-free when spi_unregister_controller() is
subsequently invoked by the devres framework.

Fix by dropping the superfluous spi_master_put().

Fixes: 944c01a889 ("spi: lpspi: enable runtime pm for lpspi")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.2+
Cc: Han Xu <han.xu@nxp.com>
Link: https://lore.kernel.org/r/ab3c0b18bd820501a12c85e440006e09ec0e275f.1604874488.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-24 13:29:21 +01:00
arch efi/x86: Free efi_pgd with free_pages() 2020-11-24 13:29:19 +01:00
block
certs
crypto
Documentation
drivers spi: lpspi: Fix use-after-free on unbind 2020-11-24 13:29:21 +01:00
fs ext4: fix bogus warning in ext4_update_dx_flag() 2020-11-24 13:29:21 +01:00
include iommu/vt-d: Avoid panic if iommu init fails in tboot system 2020-11-24 13:29:17 +01:00
init
ipc
kernel fail_function: Remove a redundant mutex unlock 2020-11-24 13:29:18 +01:00
lib
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net bpf, sockmap: Avoid returning unneeded EAGAIN when redirecting to self 2020-11-24 13:29:19 +01:00
samples
scripts
security
sound ALSA: hda/realtek: Add some Clove SSID in the ALC293(ALC1220) 2020-11-24 13:29:20 +01:00
tools selftests/bpf: Fix error return code in run_getsockopt_test() 2020-11-24 13:29:07 +01:00
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README

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.