Christophe Leroy 1d8f739b07 powerpc/kuap: Fix set direction in allow/prevent_user_access() ... __builtin_constant_p() always return 0 for pointers, so on RADIX we always end up opening both direction (by writing 0 in SPR29): 0000000000000170 <._copy_to_user>: ... 1b0: 4c 00 01 2c isync 1b4: 39 20 00 00 li r9,0 1b8: 7d 3d 03 a6 mtspr 29,r9 1bc: 4c 00 01 2c isync 1c0: 48 00 00 01 bl 1c0 <._copy_to_user+0x50> 1c0: R_PPC64_REL24 .__copy_tofrom_user ... 0000000000000220 <._copy_from_user>: ... 2ac: 4c 00 01 2c isync 2b0: 39 20 00 00 li r9,0 2b4: 7d 3d 03 a6 mtspr 29,r9 2b8: 4c 00 01 2c isync 2bc: 7f c5 f3 78 mr r5,r30 2c0: 7f 83 e3 78 mr r3,r28 2c4: 48 00 00 01 bl 2c4 <._copy_from_user+0xa4> 2c4: R_PPC64_REL24 .__copy_tofrom_user ... Use an explicit parameter for direction selection, so that GCC is able to see it is a constant: 00000000000001b0 <._copy_to_user>: ... 1f0: 4c 00 01 2c isync 1f4: 3d 20 40 00 lis r9,16384 1f8: 79 29 07 c6 rldicr r9,r9,32,31 1fc: 7d 3d 03 a6 mtspr 29,r9 200: 4c 00 01 2c isync 204: 48 00 00 01 bl 204 <._copy_to_user+0x54> 204: R_PPC64_REL24 .__copy_tofrom_user ... 0000000000000260 <._copy_from_user>: ... 2ec: 4c 00 01 2c isync 2f0: 39 20 ff ff li r9,-1 2f4: 79 29 00 04 rldicr r9,r9,0,0 2f8: 7d 3d 03 a6 mtspr 29,r9 2fc: 4c 00 01 2c isync 300: 7f c5 f3 78 mr r5,r30 304: 7f 83 e3 78 mr r3,r28 308: 48 00 00 01 bl 308 <._copy_from_user+0xa8> 308: R_PPC64_REL24 .__copy_tofrom_user ... Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Spell out the directions, s/KUAP_R/KUAP_READ/ etc.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f4e88ec4941d5facb35ce75026b0112f980086c3.1579866752.git.christophe.leroy@c-s.fr		2020-01-28 23:13:44 +11:00
..
boot	Devicetree updates for v5.5:	2019-12-02 11:41:35 -08:00
configs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2019-12-01 13:26:18 -08:00
crypto	powerpc updates for 5.5	2019-11-30 14:35:43 -08:00
include	powerpc/kuap: Fix set direction in allow/prevent_user_access()	2020-01-28 23:13:44 +11:00
kernel	powerpc/irq: fix stack overflow verification	2019-12-14 07:59:36 +11:00
kexec	powerpc: Avoid clang warnings around setjmp and longjmp	2019-11-25 21:45:43 +11:00
kvm	PPC:	2019-12-22 10:26:59 -08:00
lib	powerpc: Fix __clear_user() with KUAP enabled	2019-12-16 23:19:44 +11:00
math-emu	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
mm	powerpc/32s: Fix bad_kuap_fault()	2020-01-28 23:13:17 +11:00
net	treewide: Use sizeof_field() macro	2019-12-09 10:36:44 -08:00
oprofile	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
perf	powerpc updates for 5.5	2019-11-30 14:35:43 -08:00
platforms	powerpc/pseries/cmm: fix managed page counts when migrating pages between zones	2019-12-16 23:15:16 +11:00
purgatory	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
sysdev	powerpc/xive: Skip ioremap() of ESB pages for LSI interrupts	2019-12-05 00:11:45 +11:00
tools	powerpc/tools: Don't quote $objdump in scripts	2019-10-30 22:55:12 +11:00
xmon	powerpc: Avoid clang warnings around setjmp and longjmp	2019-11-25 21:45:43 +11:00
Kbuild	powerpc/kexec: Move kexec files into a dedicated subdir.	2019-11-21 15:41:34 +11:00
Kconfig	* PPC secure guest support	2019-12-04 11:08:30 -08:00
Kconfig.debug	powerpc: Fix Kconfig indentation	2019-11-25 21:45:43 +11:00
Makefile	powerpc: Don't add -mabi= flags when building with Clang	2019-11-25 21:45:43 +11:00
Makefile.postlink	kbuild: add $(BASH) to run scripts with bash-extension	2019-09-04 22:54:13 +09:00