The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 75353bcd2184010f08a3ed2f0da019bd9d604e1e Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld(a)intel.com>
Date: Thu, 24 Dec 2020 15:13:57 +0000
Subject: [PATCH] drm/i915: clear the shadow batch
The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
Signed-off-by: Matthew Auld <matthew.auld(a)intel.com>
Reviewed-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-1-matth…
Cc: stable(a)vger.kernel.org
(cherry picked from commit eeb52ee6c4a429ec301faf1dc48988744960786e)
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 93265951fdbb..b0899b665e85 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1166,7 +1166,7 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
}
}
if (IS_ERR(src)) {
- unsigned long x, n;
+ unsigned long x, n, remain;
void *ptr;
/*
@@ -1177,14 +1177,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
* We don't care about copying too much here as we only
* validate up to the end of the batch.
*/
+ remain = length;
if (!(dst_obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
- length = round_up(length,
+ remain = round_up(remain,
boot_cpu_data.x86_clflush_size);
ptr = dst;
x = offset_in_page(offset);
- for (n = offset >> PAGE_SHIFT; length; n++) {
- int len = min(length, PAGE_SIZE - x);
+ for (n = offset >> PAGE_SHIFT; remain; n++) {
+ int len = min(remain, PAGE_SIZE - x);
src = kmap_atomic(i915_gem_object_get_page(src_obj, n));
if (needs_clflush)
@@ -1193,13 +1194,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
kunmap_atomic(src);
ptr += len;
- length -= len;
+ remain -= len;
x = 0;
}
}
i915_gem_object_unpin_pages(src_obj);
+ memset32(dst + length, 0, (dst_obj->base.size - length) / sizeof(u32));
+
/* dst_obj is returned with vmap pinned */
return dst;
}
@@ -1392,11 +1395,6 @@ static unsigned long *alloc_whitelist(u32 batch_length)
#define LENGTH_BIAS 2
-static bool shadow_needs_clflush(struct drm_i915_gem_object *obj)
-{
- return !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
-}
-
/**
* intel_engine_cmd_parser() - parse a batch buffer for privilege violations
* @engine: the engine on which the batch is to execute
@@ -1538,16 +1536,9 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
ret = 0; /* allow execution */
}
}
-
- if (shadow_needs_clflush(shadow->obj))
- drm_clflush_virt_range(batch_end, 8);
}
- if (shadow_needs_clflush(shadow->obj)) {
- void *ptr = page_mask_bits(shadow->obj->mm.mapping);
-
- drm_clflush_virt_range(ptr, (void *)(cmd + 1) - ptr);
- }
+ i915_gem_object_flush_map(shadow->obj);
if (!IS_ERR_OR_NULL(jump_whitelist))
kfree(jump_whitelist);
The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 75353bcd2184010f08a3ed2f0da019bd9d604e1e Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld(a)intel.com>
Date: Thu, 24 Dec 2020 15:13:57 +0000
Subject: [PATCH] drm/i915: clear the shadow batch
The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
Signed-off-by: Matthew Auld <matthew.auld(a)intel.com>
Reviewed-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-1-matth…
Cc: stable(a)vger.kernel.org
(cherry picked from commit eeb52ee6c4a429ec301faf1dc48988744960786e)
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 93265951fdbb..b0899b665e85 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1166,7 +1166,7 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
}
}
if (IS_ERR(src)) {
- unsigned long x, n;
+ unsigned long x, n, remain;
void *ptr;
/*
@@ -1177,14 +1177,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
* We don't care about copying too much here as we only
* validate up to the end of the batch.
*/
+ remain = length;
if (!(dst_obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
- length = round_up(length,
+ remain = round_up(remain,
boot_cpu_data.x86_clflush_size);
ptr = dst;
x = offset_in_page(offset);
- for (n = offset >> PAGE_SHIFT; length; n++) {
- int len = min(length, PAGE_SIZE - x);
+ for (n = offset >> PAGE_SHIFT; remain; n++) {
+ int len = min(remain, PAGE_SIZE - x);
src = kmap_atomic(i915_gem_object_get_page(src_obj, n));
if (needs_clflush)
@@ -1193,13 +1194,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
kunmap_atomic(src);
ptr += len;
- length -= len;
+ remain -= len;
x = 0;
}
}
i915_gem_object_unpin_pages(src_obj);
+ memset32(dst + length, 0, (dst_obj->base.size - length) / sizeof(u32));
+
/* dst_obj is returned with vmap pinned */
return dst;
}
@@ -1392,11 +1395,6 @@ static unsigned long *alloc_whitelist(u32 batch_length)
#define LENGTH_BIAS 2
-static bool shadow_needs_clflush(struct drm_i915_gem_object *obj)
-{
- return !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
-}
-
/**
* intel_engine_cmd_parser() - parse a batch buffer for privilege violations
* @engine: the engine on which the batch is to execute
@@ -1538,16 +1536,9 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
ret = 0; /* allow execution */
}
}
-
- if (shadow_needs_clflush(shadow->obj))
- drm_clflush_virt_range(batch_end, 8);
}
- if (shadow_needs_clflush(shadow->obj)) {
- void *ptr = page_mask_bits(shadow->obj->mm.mapping);
-
- drm_clflush_virt_range(ptr, (void *)(cmd + 1) - ptr);
- }
+ i915_gem_object_flush_map(shadow->obj);
if (!IS_ERR_OR_NULL(jump_whitelist))
kfree(jump_whitelist);
The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 75353bcd2184010f08a3ed2f0da019bd9d604e1e Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld(a)intel.com>
Date: Thu, 24 Dec 2020 15:13:57 +0000
Subject: [PATCH] drm/i915: clear the shadow batch
The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
Signed-off-by: Matthew Auld <matthew.auld(a)intel.com>
Reviewed-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-1-matth…
Cc: stable(a)vger.kernel.org
(cherry picked from commit eeb52ee6c4a429ec301faf1dc48988744960786e)
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 93265951fdbb..b0899b665e85 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1166,7 +1166,7 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
}
}
if (IS_ERR(src)) {
- unsigned long x, n;
+ unsigned long x, n, remain;
void *ptr;
/*
@@ -1177,14 +1177,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
* We don't care about copying too much here as we only
* validate up to the end of the batch.
*/
+ remain = length;
if (!(dst_obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
- length = round_up(length,
+ remain = round_up(remain,
boot_cpu_data.x86_clflush_size);
ptr = dst;
x = offset_in_page(offset);
- for (n = offset >> PAGE_SHIFT; length; n++) {
- int len = min(length, PAGE_SIZE - x);
+ for (n = offset >> PAGE_SHIFT; remain; n++) {
+ int len = min(remain, PAGE_SIZE - x);
src = kmap_atomic(i915_gem_object_get_page(src_obj, n));
if (needs_clflush)
@@ -1193,13 +1194,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
kunmap_atomic(src);
ptr += len;
- length -= len;
+ remain -= len;
x = 0;
}
}
i915_gem_object_unpin_pages(src_obj);
+ memset32(dst + length, 0, (dst_obj->base.size - length) / sizeof(u32));
+
/* dst_obj is returned with vmap pinned */
return dst;
}
@@ -1392,11 +1395,6 @@ static unsigned long *alloc_whitelist(u32 batch_length)
#define LENGTH_BIAS 2
-static bool shadow_needs_clflush(struct drm_i915_gem_object *obj)
-{
- return !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
-}
-
/**
* intel_engine_cmd_parser() - parse a batch buffer for privilege violations
* @engine: the engine on which the batch is to execute
@@ -1538,16 +1536,9 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
ret = 0; /* allow execution */
}
}
-
- if (shadow_needs_clflush(shadow->obj))
- drm_clflush_virt_range(batch_end, 8);
}
- if (shadow_needs_clflush(shadow->obj)) {
- void *ptr = page_mask_bits(shadow->obj->mm.mapping);
-
- drm_clflush_virt_range(ptr, (void *)(cmd + 1) - ptr);
- }
+ i915_gem_object_flush_map(shadow->obj);
if (!IS_ERR_OR_NULL(jump_whitelist))
kfree(jump_whitelist);
The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 75353bcd2184010f08a3ed2f0da019bd9d604e1e Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld(a)intel.com>
Date: Thu, 24 Dec 2020 15:13:57 +0000
Subject: [PATCH] drm/i915: clear the shadow batch
The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
Signed-off-by: Matthew Auld <matthew.auld(a)intel.com>
Reviewed-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-1-matth…
Cc: stable(a)vger.kernel.org
(cherry picked from commit eeb52ee6c4a429ec301faf1dc48988744960786e)
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 93265951fdbb..b0899b665e85 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1166,7 +1166,7 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
}
}
if (IS_ERR(src)) {
- unsigned long x, n;
+ unsigned long x, n, remain;
void *ptr;
/*
@@ -1177,14 +1177,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
* We don't care about copying too much here as we only
* validate up to the end of the batch.
*/
+ remain = length;
if (!(dst_obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
- length = round_up(length,
+ remain = round_up(remain,
boot_cpu_data.x86_clflush_size);
ptr = dst;
x = offset_in_page(offset);
- for (n = offset >> PAGE_SHIFT; length; n++) {
- int len = min(length, PAGE_SIZE - x);
+ for (n = offset >> PAGE_SHIFT; remain; n++) {
+ int len = min(remain, PAGE_SIZE - x);
src = kmap_atomic(i915_gem_object_get_page(src_obj, n));
if (needs_clflush)
@@ -1193,13 +1194,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
kunmap_atomic(src);
ptr += len;
- length -= len;
+ remain -= len;
x = 0;
}
}
i915_gem_object_unpin_pages(src_obj);
+ memset32(dst + length, 0, (dst_obj->base.size - length) / sizeof(u32));
+
/* dst_obj is returned with vmap pinned */
return dst;
}
@@ -1392,11 +1395,6 @@ static unsigned long *alloc_whitelist(u32 batch_length)
#define LENGTH_BIAS 2
-static bool shadow_needs_clflush(struct drm_i915_gem_object *obj)
-{
- return !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
-}
-
/**
* intel_engine_cmd_parser() - parse a batch buffer for privilege violations
* @engine: the engine on which the batch is to execute
@@ -1538,16 +1536,9 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
ret = 0; /* allow execution */
}
}
-
- if (shadow_needs_clflush(shadow->obj))
- drm_clflush_virt_range(batch_end, 8);
}
- if (shadow_needs_clflush(shadow->obj)) {
- void *ptr = page_mask_bits(shadow->obj->mm.mapping);
-
- drm_clflush_virt_range(ptr, (void *)(cmd + 1) - ptr);
- }
+ i915_gem_object_flush_map(shadow->obj);
if (!IS_ERR_OR_NULL(jump_whitelist))
kfree(jump_whitelist);
The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 75353bcd2184010f08a3ed2f0da019bd9d604e1e Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld(a)intel.com>
Date: Thu, 24 Dec 2020 15:13:57 +0000
Subject: [PATCH] drm/i915: clear the shadow batch
The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow buffers")
Signed-off-by: Matthew Auld <matthew.auld(a)intel.com>
Reviewed-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris(a)chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-1-matth…
Cc: stable(a)vger.kernel.org
(cherry picked from commit eeb52ee6c4a429ec301faf1dc48988744960786e)
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 93265951fdbb..b0899b665e85 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1166,7 +1166,7 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
}
}
if (IS_ERR(src)) {
- unsigned long x, n;
+ unsigned long x, n, remain;
void *ptr;
/*
@@ -1177,14 +1177,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
* We don't care about copying too much here as we only
* validate up to the end of the batch.
*/
+ remain = length;
if (!(dst_obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
- length = round_up(length,
+ remain = round_up(remain,
boot_cpu_data.x86_clflush_size);
ptr = dst;
x = offset_in_page(offset);
- for (n = offset >> PAGE_SHIFT; length; n++) {
- int len = min(length, PAGE_SIZE - x);
+ for (n = offset >> PAGE_SHIFT; remain; n++) {
+ int len = min(remain, PAGE_SIZE - x);
src = kmap_atomic(i915_gem_object_get_page(src_obj, n));
if (needs_clflush)
@@ -1193,13 +1194,15 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
kunmap_atomic(src);
ptr += len;
- length -= len;
+ remain -= len;
x = 0;
}
}
i915_gem_object_unpin_pages(src_obj);
+ memset32(dst + length, 0, (dst_obj->base.size - length) / sizeof(u32));
+
/* dst_obj is returned with vmap pinned */
return dst;
}
@@ -1392,11 +1395,6 @@ static unsigned long *alloc_whitelist(u32 batch_length)
#define LENGTH_BIAS 2
-static bool shadow_needs_clflush(struct drm_i915_gem_object *obj)
-{
- return !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
-}
-
/**
* intel_engine_cmd_parser() - parse a batch buffer for privilege violations
* @engine: the engine on which the batch is to execute
@@ -1538,16 +1536,9 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
ret = 0; /* allow execution */
}
}
-
- if (shadow_needs_clflush(shadow->obj))
- drm_clflush_virt_range(batch_end, 8);
}
- if (shadow_needs_clflush(shadow->obj)) {
- void *ptr = page_mask_bits(shadow->obj->mm.mapping);
-
- drm_clflush_virt_range(ptr, (void *)(cmd + 1) - ptr);
- }
+ i915_gem_object_flush_map(shadow->obj);
if (!IS_ERR_OR_NULL(jump_whitelist))
kfree(jump_whitelist);
The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 311bea3cb9ee20ef150ca76fc60a592bf6b159f5 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers(a)google.com>
Date: Thu, 17 Dec 2020 16:24:32 -0800
Subject: [PATCH] arm64: link with -z norelro for LLD or aarch64-elf
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
With GNU binutils 2.35+, linking with BFD produces warnings for vmlinux:
aarch64-linux-gnu-ld: warning: -z norelro ignored
BFD can produce this warning when the target emulation mode does not
support RELRO program headers, and -z relro or -z norelro is passed.
Alan Modra clarifies:
The default linker emulation for an aarch64-linux ld.bfd is
-maarch64linux, the default for an aarch64-elf linker is
-maarch64elf. They are not equivalent. If you choose -maarch64elf
you get an emulation that doesn't support -z relro.
The ARCH=arm64 kernel prefers -maarch64elf, but may fall back to
-maarch64linux based on the toolchain configuration.
LLD will always create RELRO program header regardless of target
emulation.
To avoid the above warning when linking with BFD, pass -z norelro only
when linking with LLD or with -maarch64linux.
Fixes: 3b92fa7485eb ("arm64: link with -z norelro regardless of CONFIG_RELOCATABLE")
Fixes: 3bbd3db86470 ("arm64: relocatable: fix inconsistencies in linker script and options")
Cc: <stable(a)vger.kernel.org> # 5.0.x-
Reported-by: kernelci.org bot <bot(a)kernelci.org>
Reported-by: Quentin Perret <qperret(a)google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers(a)google.com>
Reviewed-by: Nathan Chancellor <natechancellor(a)gmail.com>
Acked-by: Ard Biesheuvel <ardb(a)kernel.org>
Cc: Alan Modra <amodra(a)gmail.com>
Cc: Fāng-ruì Sòng <maskray(a)google.com>
Link: https://lore.kernel.org/r/20201218002432.788499-1-ndesaulniers@google.com
Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com>
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6be9b3750250..90309208bb28 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -10,7 +10,7 @@
#
# Copyright (C) 1995-2001 by Russell King
-LDFLAGS_vmlinux :=--no-undefined -X -z norelro
+LDFLAGS_vmlinux :=--no-undefined -X
ifeq ($(CONFIG_RELOCATABLE), y)
# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
@@ -115,16 +115,20 @@ KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
# Prefer the baremetal ELF build target, but not all toolchains include
# it so fall back to the standard linux version if needed.
-KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
+KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro)
UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
# Same as above, prefer ELF but fall back to linux target if needed.
-KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux)
+KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro)
UTS_MACHINE := aarch64
endif
+ifeq ($(CONFIG_LD_IS_LLD), y)
+KBUILD_LDFLAGS += -z norelro
+endif
+
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y)
The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 311bea3cb9ee20ef150ca76fc60a592bf6b159f5 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers(a)google.com>
Date: Thu, 17 Dec 2020 16:24:32 -0800
Subject: [PATCH] arm64: link with -z norelro for LLD or aarch64-elf
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
With GNU binutils 2.35+, linking with BFD produces warnings for vmlinux:
aarch64-linux-gnu-ld: warning: -z norelro ignored
BFD can produce this warning when the target emulation mode does not
support RELRO program headers, and -z relro or -z norelro is passed.
Alan Modra clarifies:
The default linker emulation for an aarch64-linux ld.bfd is
-maarch64linux, the default for an aarch64-elf linker is
-maarch64elf. They are not equivalent. If you choose -maarch64elf
you get an emulation that doesn't support -z relro.
The ARCH=arm64 kernel prefers -maarch64elf, but may fall back to
-maarch64linux based on the toolchain configuration.
LLD will always create RELRO program header regardless of target
emulation.
To avoid the above warning when linking with BFD, pass -z norelro only
when linking with LLD or with -maarch64linux.
Fixes: 3b92fa7485eb ("arm64: link with -z norelro regardless of CONFIG_RELOCATABLE")
Fixes: 3bbd3db86470 ("arm64: relocatable: fix inconsistencies in linker script and options")
Cc: <stable(a)vger.kernel.org> # 5.0.x-
Reported-by: kernelci.org bot <bot(a)kernelci.org>
Reported-by: Quentin Perret <qperret(a)google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers(a)google.com>
Reviewed-by: Nathan Chancellor <natechancellor(a)gmail.com>
Acked-by: Ard Biesheuvel <ardb(a)kernel.org>
Cc: Alan Modra <amodra(a)gmail.com>
Cc: Fāng-ruì Sòng <maskray(a)google.com>
Link: https://lore.kernel.org/r/20201218002432.788499-1-ndesaulniers@google.com
Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com>
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6be9b3750250..90309208bb28 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -10,7 +10,7 @@
#
# Copyright (C) 1995-2001 by Russell King
-LDFLAGS_vmlinux :=--no-undefined -X -z norelro
+LDFLAGS_vmlinux :=--no-undefined -X
ifeq ($(CONFIG_RELOCATABLE), y)
# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
@@ -115,16 +115,20 @@ KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
# Prefer the baremetal ELF build target, but not all toolchains include
# it so fall back to the standard linux version if needed.
-KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
+KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro)
UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
# Same as above, prefer ELF but fall back to linux target if needed.
-KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux)
+KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro)
UTS_MACHINE := aarch64
endif
+ifeq ($(CONFIG_LD_IS_LLD), y)
+KBUILD_LDFLAGS += -z norelro
+endif
+
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y)
The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 311bea3cb9ee20ef150ca76fc60a592bf6b159f5 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers(a)google.com>
Date: Thu, 17 Dec 2020 16:24:32 -0800
Subject: [PATCH] arm64: link with -z norelro for LLD or aarch64-elf
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
With GNU binutils 2.35+, linking with BFD produces warnings for vmlinux:
aarch64-linux-gnu-ld: warning: -z norelro ignored
BFD can produce this warning when the target emulation mode does not
support RELRO program headers, and -z relro or -z norelro is passed.
Alan Modra clarifies:
The default linker emulation for an aarch64-linux ld.bfd is
-maarch64linux, the default for an aarch64-elf linker is
-maarch64elf. They are not equivalent. If you choose -maarch64elf
you get an emulation that doesn't support -z relro.
The ARCH=arm64 kernel prefers -maarch64elf, but may fall back to
-maarch64linux based on the toolchain configuration.
LLD will always create RELRO program header regardless of target
emulation.
To avoid the above warning when linking with BFD, pass -z norelro only
when linking with LLD or with -maarch64linux.
Fixes: 3b92fa7485eb ("arm64: link with -z norelro regardless of CONFIG_RELOCATABLE")
Fixes: 3bbd3db86470 ("arm64: relocatable: fix inconsistencies in linker script and options")
Cc: <stable(a)vger.kernel.org> # 5.0.x-
Reported-by: kernelci.org bot <bot(a)kernelci.org>
Reported-by: Quentin Perret <qperret(a)google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers(a)google.com>
Reviewed-by: Nathan Chancellor <natechancellor(a)gmail.com>
Acked-by: Ard Biesheuvel <ardb(a)kernel.org>
Cc: Alan Modra <amodra(a)gmail.com>
Cc: Fāng-ruì Sòng <maskray(a)google.com>
Link: https://lore.kernel.org/r/20201218002432.788499-1-ndesaulniers@google.com
Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com>
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6be9b3750250..90309208bb28 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -10,7 +10,7 @@
#
# Copyright (C) 1995-2001 by Russell King
-LDFLAGS_vmlinux :=--no-undefined -X -z norelro
+LDFLAGS_vmlinux :=--no-undefined -X
ifeq ($(CONFIG_RELOCATABLE), y)
# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
@@ -115,16 +115,20 @@ KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
# Prefer the baremetal ELF build target, but not all toolchains include
# it so fall back to the standard linux version if needed.
-KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
+KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro)
UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
# Same as above, prefer ELF but fall back to linux target if needed.
-KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux)
+KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro)
UTS_MACHINE := aarch64
endif
+ifeq ($(CONFIG_LD_IS_LLD), y)
+KBUILD_LDFLAGS += -z norelro
+endif
+
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y)