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| author | Richard Guy Briggs <rgb@redhat.com> | 2013-09-17 00:20:42 +0200 |
|---|---|---|
| committer | Eric Paris <eparis@redhat.com> | 2013-11-05 17:06:49 +0100 |
| commit | b50eba7e2d534762a19a7207dda012f09302a8d2 (patch) | |
| tree | 3b9f2e1c2f591648d2e9c64a66e7d01bf4e47c3a /kernel/audit.c | |
| parent | Linux 3.11 (diff) | |
| download | linux-b50eba7e2d534762a19a7207dda012f09302a8d2.tar.xz linux-b50eba7e2d534762a19a7207dda012f09302a8d2.zip | |
audit: format user messages to size of MAX_AUDIT_MESSAGE_LENGTH
Messages of type AUDIT_USER_TTY were being formatted to 1024 octets,
truncating messages approaching MAX_AUDIT_MESSAGE_LENGTH (8970 octets).
Set the formatting to 8560 characters, given maximum estimates for prefix and
suffix budgets.
See the problem discussion:
https://www.redhat.com/archives/linux-audit/2009-January/msg00030.html
And the new size rationale:
https://www.redhat.com/archives/linux-audit/2013-September/msg00016.html
Test ~8k messages with:
auditctl -m "$(for i in $(seq -w 001 820);do echo -n "${i}0______";done)"
Reported-by: LC Bruzenak <lenny@magitekltd.com>
Reported-by: Justin Stephenson <jstephen@redhat.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 91e53d04b6a9..dd63d2f978d5 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -715,7 +715,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) } audit_log_common_recv_msg(&ab, msg_type); if (msg_type != AUDIT_USER_TTY) - audit_log_format(ab, " msg='%.1024s'", + audit_log_format(ab, " msg='%.*s'", + AUDIT_MESSAGE_TEXT_MAX, (char *)data); else { int size; |