audit: handle unknown status requests in audit_receive_msg()

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Currently, audit_receive_msg() ignores unknown status bits in AUDIT_SET
requests, incorrectly returning success to newer user space tools
querying unsupported features. This breaks forward compatibility.

Fix this by defining AUDIT_STATUS_ALL and returning -EINVAL if any
unrecognized bits are set (s.mask & ~AUDIT_STATUS_ALL).
This ensures invalid requests are safely rejected, allowing user space
to reliably test for and gracefully handle feature detection on older
kernels.

Suggested-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Ricardo Robaina <rrobaina@redhat.com>
[PM: subject line tweak]
Signed-off-by: Paul Moore <paul@paul-moore.com>

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Ricardo Robaina 2026-03-09 10:05:33 -03:00 • committed by Paul Moore

parent f3e334fb7f

commit 360160f755

2 changed files with 11 additions and 0 deletions

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9

include/linux/audit.h

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2

kernel/audit.c

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