From 89c2ba9ce42a069899b6901eb4964882ccc0c66a Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 10 Jan 2022 03:15:27 +0900 Subject: [PATCH] BACKPORT: UPSTREAM: kbuild: rename cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22} GZIP-compressed files end with 4 byte data that represents the size of the original input. The decompressors (the self-extracting kernel) exploit it to know the vmlinux size beforehand. To mimic the GZIP's trailer, Kbuild provides cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}. Unfortunately these macros are used everywhere despite the appended size data is only useful for the decompressors. There is no guarantee that such hand-crafted trailers are safely ignored. In fact, the kernel refuses compressed initramdfs with the garbage data. That is why usr/Makefile overrides size_append to make it no-op. To limit the use of such broken compressed files, this commit renames the existing macros as follows: cmd_bzip2 --> cmd_bzip2_with_size cmd_lzma --> cmd_lzma_with_size cmd_lzo --> cmd_lzo_with_size cmd_lz4 --> cmd_lz4_with_size cmd_xzkern --> cmd_xzkern_with_size cmd_zstd22 --> cmd_zstd22_with_size To keep the decompressors working, I updated the following Makefiles accordingly: arch/arm/boot/compressed/Makefile arch/h8300/boot/compressed/Makefile arch/mips/boot/compressed/Makefile arch/parisc/boot/compressed/Makefile arch/s390/boot/compressed/Makefile arch/sh/boot/compressed/Makefile arch/x86/boot/compressed/Makefile I reused the current macro names for the normal usecases; they produce the compressed data in the proper format. I did not touch the following: arch/arc/boot/Makefile arch/arm64/boot/Makefile arch/csky/boot/Makefile arch/mips/boot/Makefile arch/riscv/boot/Makefile arch/sh/boot/Makefile kernel/Makefile This means those Makefiles will stop appending the size data. I dropped the 'override size_append' hack from usr/Makefile. Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier Bug: 135791357 (cherry picked from commit 7ce7e984ab2b218d6e92d5165629022fe2daf9ee https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master) Change-Id: I3524909ef3daab85f7d22afdebc2e5bbfd5e5cf3 [szuweilin: Resolved the conflict about non-existing zstd22 in arch/s390/boot/compressed/Makefile] Signed-off-by: SzuWei Lin (cherry picked from commit dd18c291f9a958a1e285ce0e84ec6b5879fe10ab) --- arch/arm/boot/compressed/Makefile | 8 +++---- arch/h8300/boot/compressed/Makefile | 4 +++- arch/mips/boot/compressed/Makefile | 12 +++++------ arch/parisc/boot/compressed/Makefile | 10 ++++----- arch/s390/boot/compressed/Makefile | 10 ++++----- arch/sh/boot/compressed/Makefile | 8 +++---- arch/x86/boot/compressed/Makefile | 12 +++++------ scripts/Makefile.lib | 31 +++++++++++++++++++++------- usr/Makefile | 5 ----- 9 files changed, 57 insertions(+), 43 deletions(-) diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 175213d7a1aa..37c3036cd468 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -76,10 +76,10 @@ CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)" CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)" compress-$(CONFIG_KERNEL_GZIP) = gzip -compress-$(CONFIG_KERNEL_LZO) = lzo -compress-$(CONFIG_KERNEL_LZMA) = lzma -compress-$(CONFIG_KERNEL_XZ) = xzkern -compress-$(CONFIG_KERNEL_LZ4) = lz4 +compress-$(CONFIG_KERNEL_LZO) = lzo_with_size +compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size +compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size +compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o diff --git a/arch/h8300/boot/compressed/Makefile b/arch/h8300/boot/compressed/Makefile index 5942793f77a0..6ab2fa5ba105 100644 --- a/arch/h8300/boot/compressed/Makefile +++ b/arch/h8300/boot/compressed/Makefile @@ -30,9 +30,11 @@ $(obj)/vmlinux.bin: vmlinux FORCE suffix-$(CONFIG_KERNEL_GZIP) := gzip suffix-$(CONFIG_KERNEL_LZO) := lzo +compress-$(CONFIG_KERNEL_GZIP) := gzip +compress-$(CONFIG_KERNEL_LZO) := lzo_with_size $(obj)/vmlinux.bin.$(suffix-y): $(obj)/vmlinux.bin FORCE - $(call if_changed,$(suffix-y)) + $(call if_changed,$(compress-y)) LDFLAGS_piggy.o := -r --format binary --oformat elf32-h8300-linux -T OBJCOPYFLAGS := -O binary diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index eae0fad30f27..69eda7ab110a 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -71,12 +71,12 @@ $(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE $(call if_changed,objcopy) tool_$(CONFIG_KERNEL_GZIP) = gzip -tool_$(CONFIG_KERNEL_BZIP2) = bzip2 -tool_$(CONFIG_KERNEL_LZ4) = lz4 -tool_$(CONFIG_KERNEL_LZMA) = lzma -tool_$(CONFIG_KERNEL_LZO) = lzo -tool_$(CONFIG_KERNEL_XZ) = xzkern -tool_$(CONFIG_KERNEL_ZSTD) = zstd22 +tool_$(CONFIG_KERNEL_BZIP2) = bzip2_with_size +tool_$(CONFIG_KERNEL_LZ4) = lz4_with_size +tool_$(CONFIG_KERNEL_LZMA) = lzma_with_size +tool_$(CONFIG_KERNEL_LZO) = lzo_with_size +tool_$(CONFIG_KERNEL_XZ) = xzkern_with_size +tool_$(CONFIG_KERNEL_ZSTD) = zstd22_with_size targets += vmlinux.bin.z $(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE diff --git a/arch/parisc/boot/compressed/Makefile b/arch/parisc/boot/compressed/Makefile index dff453687530..c09300a6ba98 100644 --- a/arch/parisc/boot/compressed/Makefile +++ b/arch/parisc/boot/compressed/Makefile @@ -73,15 +73,15 @@ suffix-$(CONFIG_KERNEL_XZ) := xz $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) $(call if_changed,gzip) $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) - $(call if_changed,bzip2) + $(call if_changed,bzip2_with_size) $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) - $(call if_changed,lz4) + $(call if_changed,lz4_with_size) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) - $(call if_changed,lzma) + $(call if_changed,lzma_with_size) $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) - $(call if_changed,lzo) + $(call if_changed,lzo_with_size) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) - $(call if_changed,xzkern) + $(call if_changed,xzkern_with_size) LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T $(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index b235ed95a3d8..0e4b585885f0 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -49,15 +49,15 @@ suffix-$(CONFIG_KERNEL_XZ) := .xz $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE $(call if_changed,gzip) $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE - $(call if_changed,bzip2) + $(call if_changed,bzip2_with_size) $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lz4) + $(call if_changed,lz4_with_size) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzma) + $(call if_changed,lzma_with_size) $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzo) + $(call if_changed,lzo_with_size) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE - $(call if_changed,xzkern) + $(call if_changed,xzkern_with_size) OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed $(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile index 589d2d8a573d..0525d8abdf45 100644 --- a/arch/sh/boot/compressed/Makefile +++ b/arch/sh/boot/compressed/Makefile @@ -58,13 +58,13 @@ vmlinux.bin.all-y := $(obj)/vmlinux.bin $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE $(call if_changed,gzip) $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE - $(call if_changed,bzip2) + $(call if_changed,bzip2_with_size) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzma) + $(call if_changed,lzma_with_size) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE - $(call if_changed,xzkern) + $(call if_changed,xzkern_with_size) $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzo) + $(call if_changed,lzo_with_size) OBJCOPYFLAGS += -R .empty_zero_page diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index ad268a15bc7b..9911512c9196 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -127,17 +127,17 @@ vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE $(call if_changed,gzip) $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE - $(call if_changed,bzip2) + $(call if_changed,bzip2_with_size) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzma) + $(call if_changed,lzma_with_size) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE - $(call if_changed,xzkern) + $(call if_changed,xzkern_with_size) $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzo) + $(call if_changed,lzo_with_size) $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lz4) + $(call if_changed,lz4_with_size) $(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE - $(call if_changed,zstd22) + $(call if_changed,zstd22_with_size) suffix-$(CONFIG_KERNEL_GZIP) := gz suffix-$(CONFIG_KERNEL_BZIP2) := bz2 diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index f4759df1cdf1..ce84bb5eadc8 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -415,20 +415,31 @@ printf "%08x\n" $$dec_size | \ ) quiet_cmd_bzip2 = BZIP2 $@ - cmd_bzip2 = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ + cmd_bzip2 = cat $(real-prereqs) | $(KBZIP2) -9 > $@ + +quiet_cmd_bzip2_with_size = BZIP2 $@ + cmd_bzip2_with_size = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ # Lzma # --------------------------------------------------------------------------- quiet_cmd_lzma = LZMA $@ - cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ + cmd_lzma = cat $(real-prereqs) | $(LZMA) -9 > $@ + +quiet_cmd_lzma_with_size = LZMA $@ + cmd_lzma_with_size = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ quiet_cmd_lzo = LZO $@ - cmd_lzo = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ + cmd_lzo = cat $(real-prereqs) | $(KLZOP) -9 > $@ + +quiet_cmd_lzo_with_size = LZO $@ + cmd_lzo_with_size = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ quiet_cmd_lz4 = LZ4 $@ - cmd_lz4 = { cat $(real-prereqs) | \ - $(LZ4) -l -12 --favor-decSpeed stdin stdout; \ + cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -12 --favor-decSpeed stdin stdout > $@ + +quiet_cmd_lz4_with_size = LZ4 $@ + cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -12 --favor-decSpeed stdin stdout; \ $(size_append); } > $@ # U-Boot mkimage @@ -471,7 +482,10 @@ quiet_cmd_uimage = UIMAGE $@ # big dictionary would increase the memory usage too much in the multi-call # decompression mode. A BCJ filter isn't used either. quiet_cmd_xzkern = XZKERN $@ - cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \ + cmd_xzkern = cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh > $@ + +quiet_cmd_xzkern_with_size = XZKERN $@ + cmd_xzkern_with_size = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \ $(size_append); } > $@ quiet_cmd_xzmisc = XZMISC $@ @@ -497,7 +511,10 @@ quiet_cmd_zstd = ZSTD $@ cmd_zstd = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@ quiet_cmd_zstd22 = ZSTD22 $@ - cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@ + cmd_zstd22 = cat $(real-prereqs) | $(ZSTD) -22 --ultra > $@ + +quiet_cmd_zstd22_with_size = ZSTD22 $@ + cmd_zstd22_with_size = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@ # ASM offsets # --------------------------------------------------------------------------- diff --git a/usr/Makefile b/usr/Makefile index b1a81a40eab1..7b89c0175a3a 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -3,11 +3,6 @@ # kbuild file for usr/ - including initramfs image # -# cmd_bzip2, cmd_lzma, cmd_lzo, cmd_lz4 from scripts/Makefile.lib appends the -# size at the end of the compressed file, which unfortunately does not work -# with unpack_to_rootfs(). Make size_append no-op. -override size_append := : - compress-y := shipped compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) := gzip compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) := bzip2