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 linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 18 Aug 2016 15:58:28 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Benjamin Coddington <bcodding@...hat.com>, Alexey Dobriyan <adobriyan@...il.com>, Weston Andros Adamson <dros@...marydata.com>, Trond Myklebust <trond.myklebust@...marydata.com> Subject: [PATCH 4.7 091/186] nfs: dont create zero-length requests 4.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Benjamin Coddington <bcodding@...hat.com> commit 149a4fddd0a72d526abbeac0c8deaab03559836a upstream. NFS doesn't expect requests with wb_bytes set to zero and may make unexpected decisions about how to handle that request at the page IO layer. Skip request creation if we won't have any wb_bytes in the request. Signed-off-by: Benjamin Coddington <bcodding@...hat.com> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com> Reviewed-by: Weston Andros Adamson <dros@...marydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- fs/nfs/write.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1289,6 +1289,9 @@ int nfs_updatepage(struct file *file, st dprintk("NFS: nfs_updatepage(%pD2 %d@...d)\n", file, count, (long long)(page_file_offset(page) + offset)); + if (!count) + goto out; + if (nfs_can_extend_write(file, page, inode)) { count = max(count + offset, nfs_page_length(page)); offset = 0; @@ -1299,7 +1302,7 @@ int nfs_updatepage(struct file *file, st nfs_set_pageerror(page); else __set_page_dirty_nobuffers(page); - +out: dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n", status, (long long)i_size_read(inode)); return status;
Powered by blists - more mailing lists