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parser: Document change_profile exec modes in apparmor.d man page

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Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
Tyler Hicks 2016-05-31 15:38:36 -05:00
parent ab1cabf94e
commit 138a9bf9ef
1 changed files with 17 additions and 1 deletions
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18
parser/apparmor.d.pod
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@ -277,7 +277,9 @@ B<ALPHA> = ('a', 'b', 'c', ... 'z', 'A', 'B', ... 'Z')
B<ALPHANUMERIC> = ('0', '1', '2', ... '9', 'a', 'b', 'c', ... 'z', 'A', 'B', ... 'Z')
B<CHANGE_PROFILE RULE> = 'change_profile' [ I<EXEC COND> ] [ '-E<gt>' I<PROFILE NAME> ]
B<CHANGE_PROFILE RULE> = 'change_profile' [ [ I<EXEC MODE> ] I<EXEC COND> ] [ '-E<gt>' I<PROFILE NAME> ]
B<EXEC_MODE> = ( 'safe' | 'unsafe' )
B<EXEC COND> = I<FILEGLOB>
@ -1208,6 +1210,20 @@ rule set. Eg.
/bin/bash Px -> new_profile1,
change_profile /bin/bash -> {new_profile1,new_profile2,new_profile3},
The exec mode dictates whether or not the Linux Kernel's B<unsafe_exec>
routines should be used to scrub the environment, similar to setuid programs.
(See ld.so(8) for some information on setuid/setgid environment scrubbing.) The
B<safe> mode sets up environment scrubbing to occur when the new application is
executed and B<unsafe> mode disables AppArmor's requirement for environment
scrubbing (the kernel and/or libc may still require environment scrubbing). An
exec mode can only be specified when an exec condition is present.
change_profile safe /bin/bash -> new_profile,
Not all kernels support B<safe> mode and the parser will downgrade rules to
B<unsafe> mode in that situation. If no exec mode is specified, the default is
B<safe> mode in kernels that support it.
=head2 rlimit rules
AppArmor can set and control the resource limits associated with a