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selinux: improve debug configuration

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If the SELinux debug configuration is enabled define the macro DEBUG
such that pr_debug() calls are always enabled, regardless of
CONFIG_DYNAMIC_DEBUG, since those message are the main reason for this
configuration in the first place.

Mention example usage in case CONFIG_DYNAMIC_DEBUG is enabled in the
help section of the configuration.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Reviewed-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Christian Göttsche 2023-08-18 17:12:14 +02:00 committed by Paul Moore
parent fb8142ff4a
commit 6f594f5a3d
2 changed files with 12 additions and 0 deletions
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10
security/selinux/Kconfig
View File

@ -77,3 +77,13 @@ config SECURITY_SELINUX_DEBUG
This enables debugging code designed to help SELinux kernel
developers, unless you know what this does in the kernel code you
should leave this disabled.
To fine control the messages to be printed enable
CONFIG_DYNAMIC_DEBUG and see
Documentation/admin-guide/dynamic-debug-howto.rst for additional
information.
Example usage:
echo -n 'file "security/selinux/*" +p' > \
/proc/dynamic_debug/control

2
security/selinux/Makefile
View File

@ -12,6 +12,8 @@ obj-$(CONFIG_SECURITY_SELINUX) := selinux.o
ccflags-y := -I$(srctree)/security/selinux -I$(srctree)/security/selinux/include
ccflags-$(CONFIG_SECURITY_SELINUX_DEBUG) += -DDEBUG
selinux-y := avc.o hooks.o selinuxfs.o netlink.o nlmsgtab.o netif.o \
netnode.o netport.o status.o \
ss/ebitmap.o ss/hashtab.o ss/symtab.o ss/sidtab.o ss/avtab.o \