linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-01 18:21:29 +00:00

No description

C 96.9%
Assembly 0.9%
Rust 0.6%
Shell 0.6%
Python 0.5%
Other 0.3%

Find a file

Noralf Trønnes 832f861a46 drm/gud: Fix UBSAN warning commit `951df98024` upstream. UBSAN complains about invalid value for bool: [ 101.165172] [drm] Initialized gud 1.0.0 20200422 for 2-3.2:1.0 on minor 1 [ 101.213360] gud 2-3.2:1.0: [drm] fb1: guddrmfb frame buffer device [ 101.213426] usbcore: registered new interface driver gud [ 101.989431] ================================================================================ [ 101.989441] UBSAN: invalid-load in linux/include/linux/iosys-map.h:253:9 [ 101.989447] load of value 121 is not a valid value for type '_Bool' [ 101.989451] CPU: 1 PID: 455 Comm: kworker/1:6 Not tainted 5.18.0-rc5-gud-5.18-rc5 #3 [ 101.989456] Hardware name: Hewlett-Packard HP EliteBook 820 G1/1991, BIOS L71 Ver. 01.44 04/12/2018 [ 101.989459] Workqueue: events_long gud_flush_work [gud] [ 101.989471] Call Trace: [ 101.989474] <TASK> [ 101.989479] dump_stack_lvl+0x49/0x5f [ 101.989488] dump_stack+0x10/0x12 [ 101.989493] ubsan_epilogue+0x9/0x3b [ 101.989498] __ubsan_handle_load_invalid_value.cold+0x44/0x49 [ 101.989504] dma_buf_vmap.cold+0x38/0x3d [ 101.989511] ? find_busiest_group+0x48/0x300 [ 101.989520] drm_gem_shmem_vmap+0x76/0x1b0 [drm_shmem_helper] [ 101.989528] drm_gem_shmem_object_vmap+0x9/0xb [drm_shmem_helper] [ 101.989535] drm_gem_vmap+0x26/0x60 [drm] [ 101.989594] drm_gem_fb_vmap+0x47/0x150 [drm_kms_helper] [ 101.989630] gud_prep_flush+0xc1/0x710 [gud] [ 101.989639] ? _raw_spin_lock+0x17/0x40 [ 101.989648] gud_flush_work+0x1e0/0x430 [gud] [ 101.989653] ? __switch_to+0x11d/0x470 [ 101.989664] process_one_work+0x21f/0x3f0 [ 101.989673] worker_thread+0x200/0x3e0 [ 101.989679] ? rescuer_thread+0x390/0x390 [ 101.989684] kthread+0xfd/0x130 [ 101.989690] ? kthread_complete_and_exit+0x20/0x20 [ 101.989696] ret_from_fork+0x22/0x30 [ 101.989706] </TASK> [ 101.989708] ================================================================================ The source of this warning is in iosys_map_clear() called from dma_buf_vmap(). It conditionally sets values based on map->is_iomem. The iosys_map variables are allocated uninitialized on the stack leading to ->is_iomem having all kinds of values and not only 0/1. Fix this by zeroing the iosys_map variables. Fixes: `40e1a70b4a` ("drm: Add GUD USB Display driver") Cc: <stable@vger.kernel.org> # v5.18+ Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/20221122-gud-shadow-plane-v2-1-435037990a83@tronnes.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2023-03-10 09:34:33 +01:00
arch	MIPS: DTS: CI20: fix otg power gpio	2023-03-10 09:34:30 +01:00
block	block: be a bit more careful in checking for NULL bdev while polling	2023-03-10 09:34:02 +01:00
certs	certs: Fix build error when PKCS#11 URI contains semicolon	2023-02-09 11:28:11 +01:00
crypto	crypto: rsa-pkcs1pad - Use akcipher_request_complete	2023-03-10 09:33:03 +01:00
Documentation	mm: memcontrol: deprecate charge moving	2023-03-10 09:34:26 +01:00
drivers	drm/gud: Fix UBSAN warning	2023-03-10 09:34:33 +01:00
fs	ceph: update the time stamps and try to drop the suid/sgid	2023-03-10 09:34:25 +01:00
include	vfio/type1: exclude mdevs from VFIO_UPDATE_VADDR	2023-03-10 09:34:32 +01:00
init	gcc: disable -Warray-bounds for gcc-11 too	2023-01-14 10:33:43 +01:00
io_uring	io_uring: mark task TASK_RUNNING before handling resume/task work	2023-03-10 09:34:07 +01:00
ipc	ipc: fix memory leak in init_mqueue_fs()	2022-12-31 13:32:01 +01:00
kernel	tracing/eprobe: Fix to add filter on eprobe description in README file	2023-03-10 09:34:27 +01:00
lib	cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG	2023-03-10 09:33:47 +01:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	memory tier: release the new_memtier in find_create_memory_tier()	2023-03-10 09:34:27 +01:00
net	wifi: cfg80211: Set SSID if it is not already set	2023-03-10 09:34:22 +01:00
rust	rust: print: avoid evaluating arguments in `pr_*` macros in `unsafe` blocks	2023-02-06 08:06:34 +01:00
samples	ftrace: Export ftrace_free_filter() to modules	2023-02-01 08:34:37 +01:00
scripts	gcc-plugins: drop -std=gnu++11 to fix GCC 13 build	2023-03-10 09:33:51 +01:00
security	ima: Align ima_file_mmap() parameters with mmap_file LSM hook	2023-03-10 09:34:15 +01:00
sound	ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC	2023-03-10 09:34:20 +01:00
tools	tools/bootconfig: fix single & used for logical condition	2023-03-10 09:34:27 +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 09:34:11 +01:00
.clang-format	inet: ping: use hlist_nulls rcu iterator during lookup	2022-12-01 12:42:46 +01:00
.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	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
.mailmap	9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address	2022-12-10 17:10:52 -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: Remove Michal Marek from Kbuild maintainers	2022-11-16 14:53:00 +09:00
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 11:25:42 +01:00
Makefile	Linux 6.1.15	2023-03-03 11:52:25 +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.