Hello,
it seems that readv(2)/writev(2) syscalls do not call
file_permission callback. Looks like this is overlook.
I have filled the issue into redhat bugzilla as
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169433
and got the recommendation to post this on lsm mailing list.
The following trivial patch solves the problem.
--- linux-2.6.12/fs/read_write.c 2005-09-28 16:18:29.000000000 +0300
+++ p/fs/read_write.c 2005-09-28 17:17:08.000000000 +0300
@@ -485,6 +485,9 @@
ret = rw_verify_area(type, file, pos, tot_len);
if (ret)
goto out;
+ ret = security_file_permission(file, type == READ ? MAY_READ : MAY_WRITE);
+ if (ret)
+ goto out;
fnv = NULL;
if (type == READ) {
Best regargs,
Kostik Belousov
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