redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/arch/x86/lib
History
Andy Lutomirski c5885886c7 x86/mmx: Use KFPU_387 for MMX string operations 
commit 67de8dca50 upstream.

The default kernel_fpu_begin() doesn't work on systems that support XMM but
haven't yet enabled CR4.OSFXSR.  This causes crashes when _mmx_memcpy() is
called too early because LDMXCSR generates #UD when the aforementioned bit
is clear.

Fix it by using kernel_fpu_begin_mask(KFPU_387) explicitly.

Fixes: 7ad816762f ("x86/fpu: Reset MXCSR to default in kernel_fpu_begin()")
Reported-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Krzysztof Piotr Olędzki <ole@ans.pl>
Tested-by: Krzysztof Mazur <krzysiek@podlesie.net>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/e7bf21855fe99e5f3baa27446e32623358f69e8d.1611205691.git.luto@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2021-01-27 11:47:49 +01:00
..
.gitignore x86: Gitignore: arch/x86/lib/inat-tables.c 2009-11-04 13:11:28 +01:00
Makefile Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 13:50:15 -07:00
atomic64_32.c x86: Adjust asm constraints in atomic64 wrappers 2012-01-20 17:29:31 -08:00
atomic64_386_32.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
atomic64_cx8_32.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cache-smp.c smp: Remove smp_call_function() and on_each_cpu() return values 2019-06-23 14:26:26 +02:00
checksum_32.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
clear_page_64.S treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
cmdline.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497 2019-06-19 17:09:53 +02:00
cmpxchg8b_emu.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
cmpxchg16b_emu.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
copy_page_64.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
copy_user_64.S x86/asm: Make some functions local labels 2019-09-06 10:41:11 +02:00
cpu.c x86/lib/cpu: Address missing prototypes warning 2019-08-08 08:25:53 +02:00
csum-copy_64.S x86/extable: Introduce _ASM_EXTABLE_UA for uaccess fixups 2018-09-03 15:12:09 +02:00
csum-partial_64.c x86/lib: Fix indentation issue, remove extra tab 2019-03-21 12:24:38 +01:00
csum-wrappers_64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 223 2019-05-30 11:29:55 -07:00
delay.c x86/asm: Fix MWAITX C-state hint value 2019-10-08 13:25:24 +02:00
error-inject.c x86/asm: Mark all top level asm statements as .text 2019-04-19 17:46:55 +02:00
getuser.S x86/asm: Make some functions local labels 2019-09-06 10:41:11 +02:00
hweight.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
inat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
insn-eval.c x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes 2020-12-11 13:23:33 +01:00
insn.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
iomap_copy_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 2019-06-19 17:09:56 +02:00
iomem.c x86: explicitly align IO accesses in memcpy_{to,from}io 2019-02-01 09:07:48 -08:00
kaslr.c x86/kaslr: Fix incorrect i8254 outb() parameters 2019-01-11 21:35:47 +01:00
memcpy_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memcpy_64.S x86/lib: Change .weak to SYM_FUNC_START_WEAK for arch/x86/lib/mem*_64.S 2020-12-16 10:56:55 +01:00
memmove_64.S x86/lib: Change .weak to SYM_FUNC_START_WEAK for arch/x86/lib/mem*_64.S 2020-12-16 10:56:55 +01:00
memset_64.S x86/lib: Change .weak to SYM_FUNC_START_WEAK for arch/x86/lib/mem*_64.S 2020-12-16 10:56:55 +01:00
misc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmx_32.c x86/mmx: Use KFPU_387 for MMX string operations 2021-01-27 11:47:49 +01:00
msr-reg-export.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
msr-reg.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
msr-smp.c x86/msr: Make rdmsrl_safe_on_cpu() scheduling safe as well 2018-03-28 10:34:13 +02:00
msr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
putuser.S x86/asm: Make some functions local labels 2019-09-06 10:41:11 +02:00
retpoline.S Revert "x86/retpoline: Simplify vmexit_fill_RSB()" 2018-02-20 09:38:26 +01:00
string_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strstr_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usercopy.c x86/nmi: Fix NMI uaccess race against CR3 switching 2018-08-31 17:08:22 +02:00
usercopy_32.c docs/core-api/mm: fix user memory accessors formatting 2019-03-05 21:07:20 -08:00
usercopy_64.c arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback 2020-10-01 13:18:21 +02:00
x86-opcode-map.txt x86/decoder: Add TEST opcode to Group3-2 2020-02-24 08:36:55 +01:00