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audit: restore AUDIT_LOGINUID unset ABI

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A regression was caused by commit 780a7654ce:
	 audit: Make testing for a valid loginuid explicit.
(which in turn attempted to fix a regression caused by e1760bd)

When audit_krule_to_data() fills in the rules to get a listing, there was a
missing clause to convert back from AUDIT_LOGINUID_SET to AUDIT_LOGINUID.

This broke userspace by not returning the same information that was sent and
expected.

The rule:
	auditctl -a exit,never -F auid=-1
gives:
	auditctl -l
		LIST_RULES: exit,never f24=0 syscall=all
when it should give:
		LIST_RULES: exit,never auid=-1 (0xffffffff) syscall=all

Tag it so that it is reported the same way it was set.  Create a new
private flags audit_krule field (pflags) to store it that won't interact with
the public one from the API.

Cc: stable@vger.kernel.org # v3.10-rc1+
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <pmoore@redhat.com>
This commit is contained in:
Richard Guy Briggs 2014-12-23 13:02:04 -05:00 • committed by Paul Moore
parent 4a92843601
commit 041d7b98ff
2 changed files with 14 additions and 0 deletions
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4
include/linux/audit.h
View file

@ -47,6 +47,7 @@ struct sk_buff;
struct audit_krule {
int vers_ops;
u32 pflags;
u32 flags;
u32 listnr;
u32 action;
@ -64,6 +65,9 @@ struct audit_krule {
u64 prio;
};
/* Flag to indicate legacy AUDIT_LOGINUID unset usage */
#define AUDIT_LOGINUID_LEGACY 0x1
struct audit_field {
u32 type;
union {