From 58eb5b6707477ff458db3ee522aac317da719e2a Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 15 Mar 2018 16:34:08 +0100 Subject: [PATCH] pstore: fix crypto dependencies The new crypto API use causes some problems with Kconfig dependencies, including this link error: fs/pstore/platform.o: In function `pstore_register': platform.c:(.text+0x248): undefined reference to `crypto_has_alg' platform.c:(.text+0x2a0): undefined reference to `crypto_alloc_base' fs/pstore/platform.o: In function `pstore_unregister': platform.c:(.text+0x498): undefined reference to `crypto_destroy_tfm' crypto/lz4hc.o: In function `lz4hc_sdecompress': lz4hc.c:(.text+0x1a): undefined reference to `LZ4_decompress_safe' crypto/lz4hc.o: In function `lz4hc_decompress_crypto': lz4hc.c:(.text+0x5a): undefined reference to `LZ4_decompress_safe' crypto/lz4hc.o: In function `lz4hc_scompress': lz4hc.c:(.text+0xaa): undefined reference to `LZ4_compress_HC' crypto/lz4hc.o: In function `lz4hc_mod_init': lz4hc.c:(.init.text+0xf): undefined reference to `crypto_register_alg' lz4hc.c:(.init.text+0x1f): undefined reference to `crypto_register_scomp' lz4hc.c:(.init.text+0x2f): undefined reference to `crypto_unregister_alg' The problem is that with CONFIG_CRYPTO=m, we must not 'select CRYPTO_LZ4' from a bool symbol, or call crypto API functions from a built-in module. This turns the sub-options into 'tristate' ones so the dependencies are honored, and makes the pstore itself select the crypto core if necessary. Fixes: cb3bee0369bc ("pstore: Use crypto compress API") Signed-off-by: Arnd Bergmann Signed-off-by: Kees Cook --- fs/pstore/Kconfig | 19 ++++++++++--------- fs/pstore/platform.c | 22 +++++++++++----------- 2 files changed, 21 insertions(+), 20 deletions(-) diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 49b407eab846..09c19ef91526 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -1,5 +1,6 @@ config PSTORE tristate "Persistent store support" + select CRYPTO if PSTORE_COMPRESS default n help This option enables generic access to platform level @@ -13,7 +14,7 @@ config PSTORE say N. config PSTORE_DEFLATE_COMPRESS - bool "DEFLATE (ZLIB) compression" + tristate "DEFLATE (ZLIB) compression" default y depends on PSTORE select CRYPTO_DEFLATE @@ -22,21 +23,21 @@ config PSTORE_DEFLATE_COMPRESS algorithm support. config PSTORE_LZO_COMPRESS - bool "LZO compression" + tristate "LZO compression" depends on PSTORE select CRYPTO_LZO help This option enables LZO compression algorithm support. config PSTORE_LZ4_COMPRESS - bool "LZ4 compression" + tristate "LZ4 compression" depends on PSTORE select CRYPTO_LZ4 help This option enables LZ4 compression algorithm support. config PSTORE_LZ4HC_COMPRESS - bool "LZ4HC compression" + tristate "LZ4HC compression" depends on PSTORE select CRYPTO_LZ4HC help @@ -70,19 +71,19 @@ choice The default compression algorithm is deflate. config PSTORE_DEFLATE_COMPRESS_DEFAULT - bool "deflate" if PSTORE_DEFLATE_COMPRESS=y + bool "deflate" if PSTORE_DEFLATE_COMPRESS config PSTORE_LZO_COMPRESS_DEFAULT - bool "lzo" if PSTORE_LZO_COMPRESS=y + bool "lzo" if PSTORE_LZO_COMPRESS config PSTORE_LZ4_COMPRESS_DEFAULT - bool "lz4" if PSTORE_LZ4_COMPRESS=y + bool "lz4" if PSTORE_LZ4_COMPRESS config PSTORE_LZ4HC_COMPRESS_DEFAULT - bool "lz4hc" if PSTORE_LZ4HC_COMPRESS=y + bool "lz4hc" if PSTORE_LZ4HC_COMPRESS config PSTORE_842_COMPRESS_DEFAULT - bool "842" if PSTORE_842_COMPRESS=y + bool "842" if PSTORE_842_COMPRESS endchoice diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 42e111b3bd0c..1143ef351c58 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -28,10 +28,10 @@ #include #include #include -#ifdef CONFIG_PSTORE_LZO_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS) #include #endif -#if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS) +#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS) #include #endif #include @@ -142,7 +142,7 @@ bool pstore_cannot_block_path(enum kmsg_dump_reason reason) } EXPORT_SYMBOL_GPL(pstore_cannot_block_path); -#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_DEFLATE_COMPRESS) static int zbufsize_deflate(size_t size) { size_t cmpr; @@ -171,21 +171,21 @@ static int zbufsize_deflate(size_t size) } #endif -#ifdef CONFIG_PSTORE_LZO_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS) static int zbufsize_lzo(size_t size) { return lzo1x_worst_compress(size); } #endif -#if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS) +#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS) static int zbufsize_lz4(size_t size) { return LZ4_compressBound(size); } #endif -#ifdef CONFIG_PSTORE_842_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_842_COMPRESS) static int zbufsize_842(size_t size) { return size; @@ -195,31 +195,31 @@ static int zbufsize_842(size_t size) static const struct pstore_zbackend *zbackend __ro_after_init; static const struct pstore_zbackend zbackends[] = { -#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_DEFLATE_COMPRESS) { .zbufsize = zbufsize_deflate, .name = "deflate", }, #endif -#ifdef CONFIG_PSTORE_LZO_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS) { .zbufsize = zbufsize_lzo, .name = "lzo", }, #endif -#ifdef CONFIG_PSTORE_LZ4_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) { .zbufsize = zbufsize_lz4, .name = "lz4", }, #endif -#ifdef CONFIG_PSTORE_LZ4HC_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS) { .zbufsize = zbufsize_lz4, .name = "lz4hc", }, #endif -#ifdef CONFIG_PSTORE_842_COMPRESS +#if IS_ENABLED(CONFIG_PSTORE_842_COMPRESS) { .zbufsize = zbufsize_842, .name = "842",