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Yan Zhao 8f24eef598 vfio: Fix NULL pointer dereference caused by uninitialized group->iommufd 
commit d649c34cb9 upstream.

group->iommufd is not initialized for the iommufd_ctx_put()

[20018.331541] BUG: kernel NULL pointer dereference, address: 0000000000000000
[20018.377508] RIP: 0010:iommufd_ctx_put+0x5/0x10 [iommufd]
...
[20018.476483] Call Trace:
[20018.479214]  <TASK>
[20018.481555]  vfio_group_fops_unl_ioctl+0x506/0x690 [vfio]
[20018.487586]  __x64_sys_ioctl+0x6a/0xb0
[20018.491773]  ? trace_hardirqs_on+0xc5/0xe0
[20018.496347]  do_syscall_64+0x67/0x90
[20018.500340]  entry_SYSCALL_64_after_hwframe+0x4b/0xb5

Fixes: 9eefba8002 ("vfio: Move vfio group specific code into group.c")
Cc: stable@vger.kernel.org
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230222074938.13681-1-yan.y.zhao@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-03-10 09:29:49 +01:00
arch mips: fix syscall_get_nr 2023-03-10 09:29:48 +01:00
block block: be a bit more careful in checking for NULL bdev while polling 2023-03-10 09:29:22 +01:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-01-31 17:53:01 +09:00
crypto crypto: rsa-pkcs1pad - Use akcipher_request_complete 2023-03-10 09:28:18 +01:00
Documentation Documentation/hw-vuln: Document the interaction between IBRS and STIBP 2023-03-10 09:29:36 +01:00
drivers vfio: Fix NULL pointer dereference caused by uninitialized group->iommufd 2023-03-10 09:29:49 +01:00
fs ceph: update the time stamps and try to drop the suid/sgid 2023-03-10 09:29:47 +01:00
include genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced 2023-03-10 09:29:48 +01:00
init Kbuild fixes for v6.2 (3rd) 2023-01-21 10:56:37 -08:00
io_uring io_uring: mark task TASK_RUNNING before handling resume/task work 2023-03-10 09:29:28 +01:00
ipc Non-MM patches for 6.2-rc1. 2022-12-12 17:28:58 -08:00
kernel dax/kmem: Fix leak of memory-hotplug resources 2023-03-10 09:29:48 +01:00
lib cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG 2023-03-10 09:29:06 +01:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON 2023-03-10 09:29:48 +01:00
net wifi: cfg80211: Set SSID if it is not already set 2023-03-10 09:29:44 +01:00
rust rust: print: avoid evaluating arguments in pr_* macros in unsafe blocks 2023-01-16 00:54:35 +01:00
samples ftrace: Export ftrace_free_filter() to modules 2023-01-24 11:20:58 -05:00
scripts gcc-plugins: drop -std=gnu++11 to fix GCC 13 build 2023-03-10 09:29:11 +01:00
security ima: Align ima_file_mmap() parameters with mmap_file LSM hook 2023-03-10 09:29:36 +01:00
sound ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC 2023-03-10 09:29:41 +01:00
tools selftests: seccomp: Fix incorrect kernel headers search path 2023-03-10 09:29:40 +01:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Register /dev/kvm as the _very_ last thing during initialization 2023-03-10 09:29:33 +01:00
.clang-format iommufd for 6.2 2022-12-14 09:15:43 -08:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore *.rpm 2022-12-30 17:22:14 +09:00
.mailmap 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SCTP maintainers 2023-02-02 11:35:33 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS audit: update the mailing list in MAINTAINERS 2023-02-25 11:13:29 +01:00
Makefile Linux 6.2.2 2023-03-03 11:56:18 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.