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[PATCH] readv/writev syscalls are not checked by lsm

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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.

Signed-off-by: Kostik Belousov <kostikbel@gmail.com>
Signed-off-by: Chris Wright <chrisw@osdl.org>
This commit is contained in:
Kostik Belousov 2005-09-28 18:21:28 +03:00 committed by Chris Wright
parent aa55a08687
commit 411b67b4b6
1 changed files with 3 additions and 0 deletions
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3
fs/read_write.c
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@ -497,6 +497,9 @@ static ssize_t do_readv_writev(int type, struct file *file,
} }
ret = rw_verify_area(type, file, pos, tot_len); 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) if (ret)
goto out; goto out;