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054f155721
linux/net
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Chuck Lever 054f155721 xprtrdma: Fix list corruption / DMAR errors during MR recovery 
The ro_release_mr methods check whether mr->mr_list is empty.
Therefore, be sure to always use list_del_init when removing an MR
linked into a list using that field. Otherwise, when recovering from
transport failures or device removal, list corruption can result, or
MRs can get mapped or unmapped an odd number of times, resulting in
IOMMU-related failures.

In general this fix is appropriate back to v4.8. However, code
changes since then make it impossible to apply this patch directly
to stable kernels. The fix would have to be applied by hand or
reworked for kernels earlier than v4.16.

Backport guidance -- there are several cases:
- When creating an MR, initialize mr_list so that using list_empty
  on an as-yet-unused MR is safe.
- When an MR is being handled by the remote invalidation path,
  ensure that mr_list is reinitialized when it is removed from
  rl_registered.
- When an MR is being handled by rpcrdma_destroy_mrs, it is removed
  from mr_all, but it may still be on an rl_registered list. In
  that case, the MR needs to be removed from that list before being
  released.
- Other cases are covered by using list_del_init in rpcrdma_mr_pop.

Fixes: 9d6b040978 ('xprtrdma: Place registered MWs on a ... ')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2018-05-01 13:29:43 -04:00
..
6lowpan License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
9p virtio: bugfixes 2018-02-15 14:29:27 -08:00
802 treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
8021q net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
appletalk net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
atm vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ax25 net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
batman-adv vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
bluetooth vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
bpf bpf: fix null pointer deref in bpf_prog_test_run_xdp 2018-02-01 07:43:56 -08:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2018-02-21 14:49:55 -05:00
caif vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
can can: migrate documentation to restructured text 2018-01-26 10:46:44 +01:00
ceph libceph, ceph: avoid memory leak when specifying same option several times 2018-02-26 16:19:30 +01:00
core net_sched: gen_estimator: fix broken estimators based on percpu stats 2018-02-23 12:35:46 -05:00
dcb
dccp vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
decnet dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock 2018-02-16 15:46:15 -05:00
dns_resolver afs: Support the AFS dynamic root 2018-02-06 14:43:37 +00:00
dsa net: dsa: Support internal phy on 'cpu' port 2018-01-23 19:22:38 -05:00
ethernet
hsr
ieee802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
ife MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
ipv4 net: ipv4: Set addr_type in hash_keys for forwarded case 2018-02-22 14:30:51 -05:00
ipv6 ipv6 sit: work around bogus gcc-8 -Wrestrict warning 2018-02-23 10:53:26 -05:00
iucv vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
kcm vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
key af_key: Fix memory leak in key_notify_policy. 2018-01-10 09:45:11 +01:00
l2tp l2tp: remove switch block in l2tp_nl_cmd_session_create() 2018-01-19 15:10:23 -05:00
l3mdev
lapb treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts 2017-11-21 16:35:54 -08:00
llc net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
mac80211 Various fixes across the tree, the shortlog basically says it all: 2018-02-22 15:17:01 -05:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
mpls mpls, nospec: Sanitize array index in mpls_label_ok() 2018-02-08 15:24:12 -05:00
ncsi net/ncsi: Don't take any action on HNCDSC AEN 2017-12-18 14:50:11 -05:00
netfilter netfilter: IDLETIMER: be syzkaller friendly 2018-02-19 18:28:59 +01:00
netlabel net/netlabel: Add list_next_rcu() in rcu_dereference(). 2017-11-18 10:32:41 +09:00
netlink netlink: put module reference if dump start fails 2018-02-22 14:01:38 -05:00
netrom net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
nfc NFC: llcp: Limit size of SDP URI 2018-02-16 15:16:05 -05:00
nsh openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
openvswitch openvswitch: Remove padding from packet before L3+ conntrack processing 2018-02-01 09:46:22 -05:00
packet vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
phonet vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
psample MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
qrtr net: use rtnl_register_module where needed 2017-12-04 11:32:39 -05:00
rds rds: do not call ->conn_alloc with GFP_KERNEL 2018-02-13 13:52:02 -05:00
rfkill vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rose net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
rxrpc rxrpc: Fix send in rxrpc_send_data_packet() 2018-02-22 15:37:47 -05:00
sched net: sched: report if filter is too large to dump 2018-02-20 21:57:17 -05:00
sctp sctp: remove the left unnecessary check for chunk in sctp_renege_events 2018-02-16 16:32:37 -05:00
smc vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
strparser strparser: Call sock_owned_by_user_nocheck 2017-12-28 14:28:22 -05:00
sunrpc xprtrdma: Fix list corruption / DMAR errors during MR recovery 2018-05-01 13:29:43 -04:00
switchdev net: bridge: Add/del switchdev object on host join/leave 2017-11-10 13:41:40 +09:00
tipc tipc: Fix missing RTNL lock protection during setting link properties 2018-02-14 14:46:33 -05:00
tls tls: getsockopt return record sequence number 2018-02-14 15:05:19 -05:00
unix net: af_unix: fix typo in UNIX_SKB_FRAGS_SZ comment 2018-02-13 12:21:45 -05:00
vmw_vsock vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
wimax License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
wireless Various fixes across the tree, the shortlog basically says it all: 2018-02-22 15:17:01 -05:00
x25 treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts 2017-11-21 16:35:54 -08:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2018-01-26 10:22:53 -05:00
compat.c
Kconfig Staging/IIO patches for 4.16-rc1 2018-02-01 09:51:57 -08:00
Makefile ipx: move Novell IPX protocol support into staging 2017-11-28 13:55:00 +01:00
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
sysctl_net.c