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Filename Latest commit message Latest commit date
James Bottomley 5b1d2561a0 tpm: use try_get_ops() in tpm-space.c
commit fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9 upstream.

As part of the series conversion to remove nested TPM operations:

https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/

exposure of the chip->tpm_mutex was removed from much of the upper
level code.  In this conversion, tpm2_del_space() was missed.  This
didn't matter much because it's usually called closely after a
converted operation, so there's only a very tiny race window where the
chip can be removed before the space flushing is done which causes a
NULL deref on the mutex.  However, there are reports of this window
being hit in practice, so fix this by converting tpm2_del_space() to
use tpm_try_get_ops(), which performs all the teardown checks before
acquring the mutex.

Cc: stable@vger.kernel.org # 5.4.x
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-28 08:46:48 +02:00
arch ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board 2022-03-28 08:46:47 +02:00
block
certs
crypto
Documentation
drivers tpm: use try_get_ops() in tpm-space.c 2022-03-28 08:46:48 +02:00
fs nfsd: Containerise filecache laundrette 2022-03-28 08:46:43 +02:00
include esp: Fix possible buffer overflow in ESP transformation 2022-03-28 08:46:44 +02:00
init
ipc
kernel rcu: Don't deboost before reporting expedited quiescent state 2022-03-28 08:46:48 +02:00
lib
LICENSES
mm
net mac80211: fix potential double free on mesh join 2022-03-28 08:46:48 +02:00
samples
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sound ALSA: hda/realtek: Add quirk for ASUS GA402 2022-03-28 08:46:46 +02:00
tools
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Makefile Linux 5.4.187 2022-03-23 09:12:08 +01:00
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.