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Zack Rusin 70da588f96 drm/vmwgfx: Fix shader stage validation 
commit 14abdfae50 upstream.

For multiple commands the driver was not correctly validating the shader
stages resulting in possible kernel oopses. The validation code was only.
if ever, checking the upper bound on the shader stages but never a lower
bound (valid shader stages start at 1 not 0).

Fixes kernel oopses ending up in vmw_binding_add, e.g.:
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 2443 Comm: testcase Not tainted 6.3.0-rc4-vmwgfx #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
RIP: 0010:vmw_binding_add+0x4c/0x140 [vmwgfx]
Code: 7e 30 49 83 ff 0e 0f 87 ea 00 00 00 4b 8d 04 7f 89 d2 89 cb 48 c1 e0 03 4c 8b b0 40 3d 93 c0 48 8b 80 48 3d 93 c0 49 0f af de <48> 03 1c d0 4c 01 e3 49 8>
RSP: 0018:ffffb8014416b968 EFLAGS: 00010206
RAX: ffffffffc0933ec0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: ffffb8014416b9c0 RDI: ffffb8014316f000
RBP: ffffb8014416b998 R08: 0000000000000003 R09: 746f6c735f726564
R10: ffffffffaaf2bda0 R11: 732e676e69646e69 R12: ffffb8014316f000
R13: ffffb8014416b9c0 R14: 0000000000000040 R15: 0000000000000006
FS:  00007fba8c0af740(0000) GS:ffff8a1277c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000007c0933eb8 CR3: 0000000118244001 CR4: 00000000003706e0
Call Trace:
 <TASK>
 vmw_view_bindings_add+0xf5/0x1b0 [vmwgfx]
 ? ___drm_dbg+0x8a/0xb0 [drm]
 vmw_cmd_dx_set_shader_res+0x8f/0xc0 [vmwgfx]
 vmw_execbuf_process+0x590/0x1360 [vmwgfx]
 vmw_execbuf_ioctl+0x173/0x370 [vmwgfx]
 ? __drm_dev_dbg+0xb4/0xe0 [drm]
 ? __pfx_vmw_execbuf_ioctl+0x10/0x10 [vmwgfx]
 drm_ioctl_kernel+0xbc/0x160 [drm]
 drm_ioctl+0x2d2/0x580 [drm]
 ? __pfx_vmw_execbuf_ioctl+0x10/0x10 [vmwgfx]
 ? do_fault+0x1a6/0x420
 vmw_generic_ioctl+0xbd/0x180 [vmwgfx]
 vmw_unlocked_ioctl+0x19/0x20 [vmwgfx]
 __x64_sys_ioctl+0x96/0xd0
 do_syscall_64+0x5d/0x90
 ? handle_mm_fault+0xe4/0x2f0
 ? debug_smp_processor_id+0x1b/0x30
 ? fpregs_assert_state_consistent+0x2e/0x50
 ? exit_to_user_mode_prepare+0x40/0x180
 ? irqentry_exit_to_user_mode+0xd/0x20
 ? irqentry_exit+0x3f/0x50
 ? exc_page_fault+0x8b/0x180
 entry_SYSCALL_64_after_hwframe+0x72/0xdc

Signed-off-by: Zack Rusin <zackr@vmware.com>
Cc: security@openanolis.org
Reported-by: Ziming Zhang <ezrakiez@gmail.com>
Testcase-found-by: Niels De Graef <ndegraef@redhat.com>
Fixes: d80efd5cb3 ("drm/vmwgfx: Initial DX support")
Cc: <stable@vger.kernel.org> # v4.3+
Reviewed-by: Maaz Mombasawala<mombasawalam@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230616190934.54828-1-zack@kde.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-09-05 01:25:09 +08:00
arch Revert "KVM: x86: enable TDP MMU by default" 2023-09-05 01:25:07 +08:00
block block/partition: fix signedness issue for Amiga partitions 2023-08-20 15:24:51 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-08-20 15:21:12 +08:00
Documentation x86/cpu: Rename srso_(.*)_alias to srso_alias_\1 2023-08-28 23:27:07 +08:00
drivers drm/vmwgfx: Fix shader stage validation 2023-09-05 01:25:09 +08:00
fs nfsd: Fix race to FREE_STATEID and cl_revoked 2023-09-05 01:25:08 +08:00
include bonding: fix macvlan over alb bond support 2023-09-05 01:25:07 +08:00
init x86/mm: Initialize text poking earlier 2023-08-20 16:01:29 +08:00
io_uring io_uring: correct check for O_TMPFILE 2023-08-20 16:01:40 +08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2023-04-19 17:56:54 +08:00
kernel tracing: Fix memleak due to race between current_tracer and trace 2023-09-05 01:25:05 +08:00
lib radix tree: remove unused variable 2023-09-05 01:25:09 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm: add a call to flush_cache_vmap() in vmap_pfn() 2023-09-05 01:25:07 +08:00
net batman-adv: Hold rtnl lock during MTU update via netlink 2023-09-05 01:25:08 +08:00
samples samples: ftrace: Save required argument registers in sample trampolines 2023-08-20 16:01:05 +08:00
scripts kbuild: Disable GCOV for *.mod.o 2023-08-20 15:24:38 +08:00
security selinux: set next pointer before attaching to list 2023-09-05 01:25:08 +08:00
sound ALSA: ymfpci: Fix the missing snd_card_free() call at probe error 2023-09-05 01:25:07 +08:00
tools objtool/x86: Fix SRSO mess 2023-09-05 01:25:02 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: Grab a reference to KVM for VM and vCPU stats file descriptors 2023-08-20 16:01:23 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-28 23:26:58 +08:00
Makefile Linux 5.15.128 2023-08-28 23:27:08 +08:00
README
stfsync.txt add file to track last rebase commit from stf 2023-08-21 00:12:49 +08:00

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.