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Subject: Re: [PATCH] apparmor: fix build error undefined reference to zlib_*
To:     Anders Roxell <anders.roxell@linaro.org>, jmorris@namei.org,
        serge@hallyn.com
Cc:     linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20190212094828.8429-1-anders.roxell@linaro.org>
From:   John Johansen <john.johansen@canonical.com>
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Organization: Canonical
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Date:   Tue, 12 Feb 2019 02:53:56 -0800
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On 2/12/19 1:48 AM, Anders Roxell wrote:
> 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@linaro.org>

yep thanks for the patch,

unfortunately this same fix landed in apparmor-next about 5 hours ago

> ---
>  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.
>