linux-kernel - [PATCH] apparmor: fix build error undefined reference to zlib

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Date:   Tue, 12 Feb 2019 10:48:28 +0100
From:   Anders Roxell <anders.roxell@...aro.org>
To:     john.johansen@...onical.com, jmorris@...ei.org, serge@...lyn.com
Cc:     linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Anders Roxell <anders.roxell@...aro.org>
Subject: [PATCH] apparmor: fix build error undefined reference to zlib_*

With commit 876dd866c084 ("apparmor: Initial implementation of raw
policy blob compression") and SECURITY_APPARMOR is set to '=y'
ZLIB_DEFLATE must be enabled as well for the linker to see the symbols.

aarch64-linux-gnu-ld: security/apparmor/policy_unpack.o: in function `deflate_compress':
../security/apparmor/policy_unpack.c:1030: undefined reference to `zlib_deflate_workspacesize'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1030:(.text+0xe20): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflate_workspacesize'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1036: undefined reference to `zlib_deflateInit2'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1036:(.text+0xe60): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflateInit2'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1053: undefined reference to `zlib_deflate'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1053:(.text+0xec0): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflate'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081: undefined reference to `zlib_deflateEnd'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081:(.text+0xf90): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflateEnd'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081: undefined reference to `zlib_deflateEnd'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081:(.text+0xfb4): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflateEnd'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081: undefined reference to `zlib_deflateEnd'
aarch64-linux-gnu-ld: ../security/apparmor/policy_unpack.c:1081:(.text+0xfd8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `zlib_deflateEnd'
make[1]: *** [Makefile:1023: vmlinux] Error 1
make[1]: Target 'Image' not remade because of errors.
make: *** [Makefile:152: sub-make] Error 2
make: Target 'Image' not remade because of errors.

Rework so when SECURITY_APPARMOR is set to '=y' ZLIB_INFLATE and ZLIB_DEFLATE gets
selected, since both are used by the SECURITY_APPARMOR.

Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
---
 security/apparmor/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/apparmor/Kconfig b/security/apparmor/Kconfig
index 3de21f46c82a..99c35e22c119 100644
--- a/security/apparmor/Kconfig
+++ b/security/apparmor/Kconfig
@@ -5,6 +5,8 @@ config SECURITY_APPARMOR
 	select SECURITY_PATH
 	select SECURITYFS
 	select SECURITY_NETWORK
+	select ZLIB_INFLATE
+	select ZLIB_DEFLATE
 	default n
 	help
 	  This enables the AppArmor security module.
-- 
2.20.1