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bba5c1887a
linux_dsm_epyc7002/fs/nfs
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Weston Andros Adamson bba5c1887a nfs: disallow duplicate pages in pgio page vectors 
Adjacent requests that share the same page are allowed, but should only
use one entry in the page vector. This avoids overruning the page
vector - it is sized based on how many bytes there are, not by
request count.

This fixes issues that manifest as "Redzone overwritten" bugs (the
vector overrun) and hangs waiting on page read / write, as it waits on
the same page more than once.

This also adds bounds checking to the page vector with a graceful failure
(WARN_ON_ONCE and pgio error returned to application).

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-08-22 18:04:44 -04:00
..
blocklayout FS/NFS: replace count*size kzalloc by kcalloc 2014-06-25 19:02:14 -04:00
filelayout NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
objlayout nfs: remove unused writeverf code 2014-06-24 18:47:00 -04:00
cache_lib.c NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
cache_lib.h NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
callback_proc.c NFSv4.1: Minor optimisation in get_layout_by_fh_locked() 2014-02-19 21:21:06 -05:00
callback_xdr.c Merge branch 'labeled-nfs' into linux-next 2013-06-28 16:29:51 -04:00
callback.c nfs4: copy acceptor name from context to nfs_client 2014-07-12 18:41:25 -04:00
callback.h NFS: Add in v4.2 callback operation 2013-06-08 16:20:18 -04:00
client.c NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
delegation.c nfs4: add nfs4_check_delegation 2014-07-12 18:22:58 -04:00
delegation.h nfs4: add nfs4_check_delegation 2014-07-12 18:22:58 -04:00
dir.c NFS: fix two problems in lookup_revalidate in RCU-walk 2014-08-04 09:22:08 -04:00
direct.c Merge branch 'bugfixes' into linux-next 2014-07-13 15:22:02 -04:00
dns_resolve.c NFS: Enabling v4.2 should not recompile nfsd and lockd 2013-11-19 16:20:40 -05:00
dns_resolve.h NFS: DNS resolver cache per network namespace context introduced 2012-01-31 18:20:26 -05:00
file.c sched: Remove proliferation of wait_on_bit() action functions 2014-07-16 15:10:39 +02:00
fscache-index.c NFS: Use the inode->i_version to cache NFSv4 change attribute information 2011-10-18 09:14:34 -07:00
fscache.c NFS: Use i_writecount to control whether to get an fscache cookie in nfs_open() 2013-09-27 18:40:25 +01:00
fscache.h NFS: Use i_writecount to control whether to get an fscache cookie in nfs_open() 2013-09-27 18:40:25 +01:00
getroot.c dcache: d_obtain_alias callers don't all want DISCONNECTED 2014-08-07 14:40:10 -04:00
idmap.c Merge branch 'keys-fixes' into keys-next 2014-07-22 21:55:45 +01:00
inode.c NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
internal.h NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
iostat.h NFS: Squelch compiler warning in nfs_add_server_stats() 2010-05-14 15:09:31 -04:00
Kconfig nfs: fix pnfs Kconfig defaults 2013-11-15 13:41:43 -05:00
Makefile Push the file layout driver into a subdirectory 2014-05-29 20:21:56 -04:00
mount_clnt.c nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it 2013-06-28 15:51:51 -04:00
namespace.c nfs: use %p[dD] instead of open-coded (and often racy) equivalents 2013-10-24 23:34:50 -04:00
netns.h NFS: Fix /proc/fs/nfsfs/servers and /proc/fs/nfsfs/volumes 2014-08-04 09:28:32 -07:00
nfs2super.c NFS: Convert v2 into a module 2012-07-30 19:06:41 -04:00
nfs2xdr.c NFS: Create a common results structure for reads and writes 2014-05-28 18:12:43 -04:00
nfs3acl.c nfs3_list_one_acl(): check get_acl() result with IS_ERR_OR_NULL 2014-08-03 17:05:22 -04:00
nfs3client.c NFS: Only initialize the ACL client in the v3 case 2012-07-30 19:05:54 -04:00
nfs3proc.c Merge branch 'bugfixes' into linux-next 2014-07-13 15:22:02 -04:00
nfs3super.c nfs: use generic posix ACL infrastructure for v3 Posix ACLs 2014-01-26 08:26:20 -05:00
nfs3xdr.c NFS: Create a common results structure for reads and writes 2014-05-28 18:12:43 -04:00
nfs4_fs.h nfs4: turn free_lock_state into a void return operation 2014-07-12 18:36:37 -04:00
nfs4client.c nfsv4: set hostname when creating nfsv4 ds connection 2014-07-08 14:30:03 -04:00
nfs4file.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-06-12 10:30:18 -07:00
nfs4getroot.c NFSv4: Fix security auto-negotiation 2013-09-07 16:18:30 -04:00
nfs4namespace.c NFSv4: test SECINFO RPC_AUTH_GSS pseudoflavors for support 2014-06-24 18:46:58 -04:00
nfs4proc.c NFS: Avoid infinite loop when RELEASE_LOCKOWNER getting expired error 2014-08-04 16:51:38 -04:00
nfs4renewd.c workqueue: use mod_delayed_work() instead of cancel + queue 2012-08-13 16:27:37 -07:00
nfs4session.c NFSv4.1: nfs4_destroy_session must call rpc_destroy_waitqueue 2014-02-01 15:13:39 -05:00
nfs4session.h NFSv4.1: nfs4_destroy_session must call rpc_destroy_waitqueue 2014-02-01 15:13:39 -05:00
nfs4state.c NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
nfs4super.c mm + fs: store shadow entries in page cache 2014-04-03 16:21:01 -07:00
nfs4sysctl.c nfs: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
nfs4trace.c NFSv4.1: Add tracepoints for debugging slot table operations 2013-08-22 08:58:27 -04:00
nfs4trace.h nfs: merge nfs_pgio_data into _header 2014-06-24 18:47:00 -04:00
nfs4xdr.c NFSv4: Drop cast 2014-07-12 18:43:47 -04:00
nfs.h NFS: Convert v4 into a module 2012-07-30 19:06:52 -04:00
nfsroot.c SUNRPC/NFS: Add Kbuild dependencies for NFS_DEBUG/RPC_DEBUG 2012-03-20 13:08:26 -04:00
nfstrace.c NFS: Add event tracing for generic NFS lookups 2013-08-22 08:58:18 -04:00
nfstrace.h NFS: fix the handling of NFS_INO_INVALID_DATA flag in nfs_revalidate_mapping 2014-01-27 15:35:56 -05:00
pagelist.c nfs: disallow duplicate pages in pgio page vectors 2014-08-22 18:04:44 -04:00
pnfs_dev.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
pnfs.c NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
pnfs.h pnfs: add pnfs_put_lseg_async 2014-08-03 17:05:25 -04:00
proc.c nfs: merge nfs_pgio_data into _header 2014-06-24 18:47:00 -04:00
read.c nfs: get rid of duplicate dprintk 2014-06-25 19:01:27 -04:00
super.c nfs: reject changes to resvport and sharecache during remount 2014-08-04 17:41:52 -04:00
symlink.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sysctl.c nfs: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
unlink.c nfs: emit a fsnotify_nameremove call in sillyrename codepath 2014-03-17 15:14:17 -04:00
write.c nfs: don't sleep with inode lock in lock_and_join_requests 2014-08-22 18:04:43 -04:00