Makefile: globally enable VLA warning

RFC PATCH In review Kees Cook 3 participants 6 messages Jun 26, 2018

Subsystems (4)

DRM drivers Kbuild Intel i915 Library code

lore

Share & tools

lore

Kees Cook

author

2018-06-26 17:40 UTC #0 lore raw

RFC PATCH 1/1 Makefile: globally enable VLA warning

This is the patch I've got prepared now that fixes for all VLAs have been sent to maintainers (some are still under review/adjustment, but there aren't any unexplored cases left). My intention would be to have this land at the end of the next merge window after all the pending VLA patches have landed. I just wanted to get any feedback here, since it touches a couple areas in the process and I didn't want anyone to be surprised. :)

Thanks!

-Kees

----
Now that VLAs have been removed from the kernel, enable the VLA warning globally. The only exceptions to this are the KASan an UBSan tests which are explicitly checking that VLAs trigger their respective tests.

Signed-off-by Kees Cook <[email protected]>

---
 Makefile                      | 3 +++
 drivers/gpu/drm/i915/Makefile | 2 +-
 lib/Makefile                  | 2 ++
 scripts/Makefile.extrawarn    | 1 -
 4 files changed, 6 insertions(+), 2 deletions(-)

Makefile +3 -0

index c9132594860b..3d5013ec4116 100644
@@ -778,6 +778,9 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 # warn about C99 declaration after statement
 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 
+# VLAs should not be used anywhere in the kernel
+KBUILD_CFLAGS += $(call cc-option,-Wvla)
+
 # disable pointer signed / unsigned warnings in gcc 4.0
 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)

drivers/gpu/drm/i915/Makefile +1 -1

index 4c6adae23e18..289ab5dc5712 100644
@@ -12,7 +12,7 @@
 # Note the danger in using -Wall -Wextra is that when CI updates gcc we
 # will most likely get a sudden build breakage... Hopefully we will fix
 # new warnings before CI updates!
-subdir-ccflags-y := -Wall -Wextra -Wvla
+subdir-ccflags-y := -Wall -Wextra
 subdir-ccflags-y += $(call cc-disable-warning, unused-parameter)
 subdir-ccflags-y += $(call cc-disable-warning, type-limits)
 subdir-ccflags-y += $(call cc-disable-warning, missing-field-initializers)

lib/Makefile +2 -0

index 90dc5520b784..4720e276232e 100644
@@ -52,7 +52,9 @@ obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
 obj-$(CONFIG_TEST_HASH) += test_hash.o test_siphash.o
 obj-$(CONFIG_TEST_KASAN) += test_kasan.o
 CFLAGS_test_kasan.o += -fno-builtin
+CFLAGS_test_kasan.o += $(call cc-disable-warning, vla)
 obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
+CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
 UBSAN_SANITIZE_test_ubsan.o := y
 obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
 obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o

scripts/Makefile.extrawarn +0 -1

index 8d5357053f86..24b2fb1d1297 100644
@@ -52,7 +52,6 @@ warning-3 += -Wpointer-arith
 warning-3 += -Wredundant-decls
 warning-3 += -Wswitch-default
 warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
-warning-3 += $(call cc-option, -Wvla)
 
 warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
 warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))

Signature · 10 lines

2.17.1


-- 
Kees Cook
Pixel Security
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Patchwork

2018-06-26 18:03 UTC #1 lore raw

✗ Fi.CI.SPARSE: warning for Makefile: globally enable VLA warning

== Series Details ==

Series: Makefile: globally enable VLA warning
URL : https://patchwork.freedesktop.org/series/45421/
State : warning

== Summary ==

$ dim sparse origin/drm-tip
Commit: Makefile: globally enable VLA warning
-
+drivers/gpu/drm/ati_pcigart.c:184:52:    expected unsigned int [unsigned] [usertype] <noident>
+drivers/gpu/drm/ati_pcigart.c:184:52:    got restricted __le32 [usertype] <noident>
+drivers/gpu/drm/ati_pcigart.c:184:52: warning: incorrect type in assignment (different base types)
+drivers/gpu/drm/drm_atomic.c:1282:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_atomic.c:1282:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_bufs.c:213:45:    expected void *handle
+drivers/gpu/drm/drm_bufs.c:213:45:    got void [noderef] <asn:2>*
+drivers/gpu/drm/drm_bufs.c:213:45: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_bufs.c:216:45:    expected void *handle
+drivers/gpu/drm/drm_bufs.c:216:45:    got void [noderef] <asn:2>*
+drivers/gpu/drm/drm_bufs.c:216:45: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_bufs.c:331:36:    expected void volatile [noderef] <asn:2>*addr
+drivers/gpu/drm/drm_bufs.c:331:36:    got void *handle
+drivers/gpu/drm/drm_bufs.c:331:36: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_bufs.c:348:36:    expected void volatile [noderef] <asn:2>*addr
+drivers/gpu/drm/drm_bufs.c:348:36:    got void *handle
+drivers/gpu/drm/drm_bufs.c:348:36: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_bufs.c:514:28:    expected void volatile [noderef] <asn:2>*addr
+drivers/gpu/drm/drm_bufs.c:514:28:    got void *handle
+drivers/gpu/drm/drm_bufs.c:514:28: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_color_mgmt.c:127:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_debugfs_crc.c:332:17:    expected restricted __poll_t ( *poll )( ... )
+drivers/gpu/drm/drm_debugfs_crc.c:332:17:    got unsigned int ( *<noident> )( ... )
+drivers/gpu/drm/drm_debugfs_crc.c:332:17: warning: incorrect type in initializer (different base types)
+drivers/gpu/drm/drm_dp_aux_dev.c:157:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_aux_dev.c:199:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:766:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:914:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:944:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_helper.c:944:36: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1429:26: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1516:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:1516:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2267:15: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:2285:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:364:37: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_dp_mst_topology.c:364:37: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_drv.c:334:6: warning: context imbalance in 'drm_dev_enter' - different lock contexts for basic block
+drivers/gpu/drm/drm_drv.c:354:6: warning: context imbalance in 'drm_dev_exit' - unexpected unlock
+drivers/gpu/drm/drm_edid.c:1906:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:3868:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:3868:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:3944:45: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:3944:45: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:4128:21: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:4130:21: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_edid.c:4132:16: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1012:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1012:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1013:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1013:23: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1018:22: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1018:22: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1854:40: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1854:40: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1855:40: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1855:40: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1869:43: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1869:43: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1871:43: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:1871:43: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:983:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:983:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:984:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:984:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:985:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:985:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:986:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_fb_helper.c:986:20: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioc32.c:188:39:    expected void [noderef] <asn:1>*uptr
+drivers/gpu/drm/drm_ioc32.c:188:39:    got void *[addressable] [assigned] handle
+drivers/gpu/drm/drm_ioc32.c:188:39: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_ioc32.c:219:39:    expected void [noderef] <asn:1>*uptr
+drivers/gpu/drm/drm_ioc32.c:219:39:    got void *[addressable] [assigned] handle
+drivers/gpu/drm/drm_ioc32.c:219:39: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_ioc32.c:220:24: error: incompatible types in comparison expression (different address spaces)
+drivers/gpu/drm/drm_ioc32.c:239:20:    expected void *handle
+drivers/gpu/drm/drm_ioc32.c:239:20:    got void [noderef] <asn:1>*
+drivers/gpu/drm/drm_ioc32.c:239:20: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_ioc32.c:508:24:    expected void *[assigned] handle
+drivers/gpu/drm/drm_ioc32.c:508:24:    got void [noderef] <asn:1>*
+drivers/gpu/drm/drm_ioc32.c:508:24: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_ioc32.c:529:41:    expected void [noderef] <asn:1>*uptr
+drivers/gpu/drm/drm_ioc32.c:529:41:    got void *[addressable] [assigned] handle
+drivers/gpu/drm/drm_ioc32.c:529:41: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_ioctl.c:376:35: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:376:35: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_ioctl.c:813:17: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_memory.c:128:29:    expected void *handle
+drivers/gpu/drm/drm_memory.c:128:29:    got void [noderef] <asn:2>*
+drivers/gpu/drm/drm_memory.c:128:29: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_memory.c:137:29:    expected void *handle
+drivers/gpu/drm/drm_memory.c:137:29:    got void [noderef] <asn:2>*
+drivers/gpu/drm/drm_memory.c:137:29: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/drm_memory.c:149:28:    expected void volatile [noderef] <asn:2>*addr
+drivers/gpu/drm/drm_memory.c:149:28:    got void *handle
+drivers/gpu/drm/drm_memory.c:149:28: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/drm_memory.c:153:5: warning: symbol 'drm_get_max_iomem' was not declared. Should it be static?
+drivers/gpu/drm/drm_memory.c:159:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_memory.c:159:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:519:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:519:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:520:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:520:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:540:49: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:540:49: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:541:37: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:541:37: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:766:21: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:766:21: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:767:19: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:767:19: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:785:41: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:785:41: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:786:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_mm.c:786:29: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:890:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:890:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:891:30: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:891:30: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:892:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:892:32: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:893:30: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_modes.c:893:30: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:106:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:114:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:44:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:44:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:45:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:45:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:46:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:46:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:47:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:47:18: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:90:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/drm_rect.c:98:27: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    expected void [noderef] <asn:4>**slot
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    expected void **slot
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    expected void **slot
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    expected void **slot
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    got void [noderef] <asn:4>**
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    got void [noderef] <asn:4>**
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    got void [noderef] <asn:4>**
+drivers/gpu/drm/i915/gvt/gtt.c:671:9:    got void **slot
+drivers/gpu/drm/i915/gvt/gtt.c:671:9: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/i915/gvt/gtt.c:671:9: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/i915/gvt/gtt.c:671:9: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/i915/gvt/gtt.c:671:9: warning: incorrect type in assignment (different address spaces)
+drivers/gpu/drm/i915/gvt/gtt.c:672:45:    expected void [noderef] <asn:4>**slot
+drivers/gpu/drm/i915/gvt/gtt.c:672:45:    got void **slot
+drivers/gpu/drm/i915/gvt/gtt.c:672:45: warning: incorrect type in argument 1 (different address spaces)
+drivers/gpu/drm/i915/gvt/mmio.c:253:23: warning: memcpy with byte count of 279040
+drivers/gpu/drm/i915/gvt/mmio.c:254:23: warning: memcpy with byte count of 279040
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/gvt/vgpu.c:195:48: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_cmd_parser.c:1104:35: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_cmd_parser.c:1104:35: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4307:41: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4307:41: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4361:49: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4361:49: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4417:49: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_debugfs.c:4417:49: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_drv.h:171:19: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_drv.h:171:19: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_drv.h:171:19: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_drv.h:171:19: warning: expression using sizeof(void)
+drivers/gpu/drm/i915/i915_d

_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Patchwork

2018-06-26 18:21 UTC #2 lore raw

✓ Fi.CI.BAT: success for Makefile: globally enable VLA warning

In reply to Kees Cook

== Series Details ==

Series: Makefile: globally enable VLA warning
URL : https://patchwork.freedesktop.org/series/45421/
State : success

== Summary ==

= CI Bug Log - changes from CI_DRM_4381 -> Patchwork_9427 =

== Summary - SUCCESS ==

No regressions found.

External URL: https://patchwork.freedesktop.org/api/1.0/series/45421/revisions/1/mbox/

== Known issues ==

Here are the changes found in Patchwork_9427 that come from known issues:

=== IGT changes ===

    ==== Issues hit ====

    igt@gem_exec_gttfill@basic:
      fi-byt-n2820:       PASS -> FAIL (fdo#106744)

    igt@kms_flip@basic-flip-vs-wf_vblank:
      fi-glk-dsi:         PASS -> FAIL (fdo#100368)

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c:
      fi-bxt-dsi:         PASS -> INCOMPLETE (fdo#103927)

fdo#100368 https://bugs.freedesktop.org/show_bug.cgi?id=100368
fdo#103927 https://bugs.freedesktop.org/show_bug.cgi?id=103927
fdo#106744 https://bugs.freedesktop.org/show_bug.cgi?id=106744

== Participating hosts (44 -> 39) ==

Missing (5): fi-ctg-p8600 fi-ilk-m540 fi-byt-squawks fi-bsw-cyan fi-hsw-4200u

== Build changes ==

* Linux: CI_DRM_4381 -> Patchwork_9427

CI_DRM_4381: ed0d219201c3fd3eb430b712d6ceb51b423daefc @ git://anongit.freedesktop.org/gfx-ci/linux
IGT_4530: 0e98bf69f146eb72fe3a7c3b19a049b5786f0ca3 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
Patchwork_9427: e40c09ebdd8985f81970f02ada37dc18072c44ee @ git://anongit.freedesktop.org/gfx-ci/linux

== Linux commits ==

e40c09ebdd89 Makefile: globally enable VLA warning

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_9427/issues.html
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Patchwork

2018-06-26 20:00 UTC #3 lore raw

✗ Fi.CI.IGT: failure for Makefile: globally enable VLA warning

In reply to Kees Cook

== Series Details ==

Series: Makefile: globally enable VLA warning
URL : https://patchwork.freedesktop.org/series/45421/
State : failure

== Summary ==

= CI Bug Log - changes from CI_DRM_4381_full -> Patchwork_9427_full =

== Summary - FAILURE ==

Serious unknown changes coming with Patchwork_9427_full absolutely need to be verified manually.

If you think the reported changes have nothing to do with the changes introduced in Patchwork_9427_full, please notify your bug team to allow them to document this new failure mode, which will reduce false positives in CI.

== Possible new issues ==

Here are the unknown changes that may have been introduced in Patchwork_9427_full:

=== IGT changes ===

    ==== Possible regressions ====

    igt@drv_selftest@live_execlists:
      shard-glk:          PASS -> DMESG-FAIL

    igt@drv_selftest@live_guc:
      shard-glk:          PASS -> DMESG-WARN

    
    ==== Warnings ====

    igt@gem_exec_schedule@deep-bsd2:
      shard-kbl:          PASS -> SKIP

    igt@gem_exec_schedule@deep-vebox:
      shard-kbl:          SKIP -> PASS +3

    igt@gem_linear_blits@interruptible:
      shard-apl:          SKIP -> PASS

== Known issues ==

Here are the changes found in Patchwork_9427_full that come from known issues:

=== IGT changes ===

    ==== Issues hit ====

    igt@drv_selftest@live_gtt:
      shard-kbl:          PASS -> INCOMPLETE (fdo#103665) +1
      shard-glk:          PASS -> FAIL (fdo#105347)
      shard-apl:          PASS -> INCOMPLETE (fdo#103927)

    igt@drv_selftest@live_hangcheck:
      shard-glk:          PASS -> DMESG-FAIL (fdo#106560, fdo#106947)

    igt@kms_flip@2x-flip-vs-expired-vblank:
      shard-glk:          PASS -> FAIL (fdo#105363)

    igt@kms_flip@plain-flip-fb-recreate:
      shard-glk:          PASS -> FAIL (fdo#100368)

    igt@kms_flip_tiling@flip-to-y-tiled:
      shard-glk:          PASS -> FAIL (fdo#104724)

    igt@kms_rotation_crc@cursor-rotation-180:
      shard-hsw:          PASS -> FAIL (fdo#104724, fdo#103925)

    
    ==== Possible fixes ====

    igt@gem_exec_await@wide-contexts:
      shard-glk:          FAIL (fdo#105900) -> PASS

    igt@kms_cursor_legacy@2x-long-cursor-vs-flip-atomic:
      shard-hsw:          FAIL (fdo#105767) -> PASS

    igt@kms_cursor_legacy@2x-nonblocking-modeset-vs-cursor-atomic:
      shard-glk:          FAIL (fdo#105454, fdo#106509) -> PASS

    igt@kms_flip@2x-plain-flip-fb-recreate:
      shard-glk:          FAIL (fdo#100368) -> PASS

    igt@kms_flip@flip-vs-expired-vblank-interruptible:
      shard-glk:          FAIL (fdo#102887, fdo#105363) -> PASS

    igt@kms_setmode@basic:
      shard-apl:          FAIL (fdo#99912) -> PASS
      shard-kbl:          FAIL (fdo#99912) -> PASS

== Participating hosts (5 -> 5) ==

No changes in participating hosts

== Build changes ==

* Linux: CI_DRM_4381 -> Patchwork_9427

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_9427/shards.html
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Joe Perches

2018-06-26 20:21 UTC #4 lore raw

In reply to Kees Cook

Quoted 6 lines · Kees Cook

This is the patch I've got prepared now that fixes for all VLAs have been sent to maintainers (some are still under review/adjustment, but there aren't any unexplored cases left). My intention would be to have this land at the end of the next merge window after all the pending VLA patches have landed. I just wanted to get any feedback here, since it touches a couple areas in the process and I didn't want anyone to be surprised. :)

[]

Makefile

Quoted 1 line

Makefile +0 -0

[]

Makefile NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) · line 782

Quoted 6 lines

Makefile +2 -0

@@ -778,6 +778,9 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 # warn about C99 declaration after statement
 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 
+# VLAs should not be used anywhere in the kernel
+KBUILD_CFLAGS += $(call cc-option,-Wvla)

I'd probably spell out what a VLA is here.
# VLAs (Variable Length Arrays) should not be used anywhere in the kernel

Beyond that, seems sensible, thanks.
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Kees Cook

author

2018-06-26 22:02 UTC #5 lore raw

Quoted 14 lines · Joe Perches

Quoted 6 lines · Kees Cook
This is the patch I've got prepared now that fixes for all VLAs have been sent to maintainers (some are still under review/adjustment, but there aren't any unexplored cases left). My intention would be to have this land at the end of the next merge window after all the pending VLA patches have landed. I just wanted to get any feedback here, since it touches a couple areas in the process and I didn't want anyone to be surprised. :)
[]
Makefile
Quoted 1 line
Makefile +0 -0
[]
Quoted 4 lines
Makefile +0 -0
@@ -778,6 +778,9 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 # warn about C99 declaration after statement
 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 

Quoted 7 lines

Makefile NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) · line 782
Quoted 2 lines
Makefile +2 -0
+# VLAs should not be used anywhere in the kernel
+KBUILD_CFLAGS += $(call cc-option,-Wvla)
I'd probably spell out what a VLA is here.
# VLAs (Variable Length Arrays) should not be used anywhere in the kernel
Beyond that, seems sensible, thanks.

Ah yes, good idea. I've made that change locally now. Thanks!

-Kees

Signature · 6 lines

Kees Cook
Pixel Security
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx