lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 5 Jun 2019 18:45:40 -0700 From: ira.weiny@...el.com To: Dan Williams <dan.j.williams@...el.com>, Jan Kara <jack@...e.cz>, "Theodore Ts'o" <tytso@....edu>, Jeff Layton <jlayton@...nel.org>, Dave Chinner <david@...morbit.com> Cc: Ira Weiny <ira.weiny@...el.com>, Matthew Wilcox <willy@...radead.org>, linux-xfs@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, John Hubbard <jhubbard@...dia.com>, Jérôme Glisse <jglisse@...hat.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org, linux-ext4@...r.kernel.org, linux-mm@...ck.org Subject: [PATCH RFC 07/10] fs/ext4: Fail truncate if pages are GUP pinned From: Ira Weiny <ira.weiny@...el.com> If pages are actively gup pinned fail the truncate operation. Signed-off-by: Ira Weiny <ira.weiny@...el.com> --- fs/ext4/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 75f543f384e4..1ded83ec08c0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4250,6 +4250,9 @@ int ext4_break_layouts(struct inode *inode, loff_t offset, loff_t len) if (!page) return 0; + if (page_gup_pinned(page)) + return -ETXTBSY; + error = ___wait_var_event(&page->_refcount, atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, 0, 0, -- 2.20.1
Powered by blists - more mailing lists