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NeilBrown cf64b9bce9 SUNRPC: return proper error from get_expiry() 
The get_expiry() function currently returns a timestamp, and uses the
special return value of 0 to indicate an error.

Unfortunately this causes a problem when 0 is the correct return value.

On a system with no RTC it is possible that the boot time will be seen
to be "3".  When exportfs probes to see if a particular filesystem
supports NFS export it tries to cache information with an expiry time of
"3".  The intention is for this to be "long in the past".  Even with no
RTC it will not be far in the future (at most a second or two) so this
is harmless.
But if the boot time happens to have been calculated to be "3", then
get_expiry will fail incorrectly as it converts the number to "seconds
since bootime" - 0.

To avoid this problem we change get_expiry() to report the error quite
separately from the expiry time.  The error is now the return value.
The expiry time is reported through a by-reference parameter.

Reported-by: Jerry Zhang <jerry@skydio.com>
Tested-by: Jerry Zhang <jerry@skydio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
 		2023-04-26 09:05:00 -04:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p 9p/xen : Fix use after free bug in xen_9pfs_front_remove due to race condition 2023-04-02 01:00:31 +00:00
802
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8021q vlan: Add MACsec offload operations for VLAN interface 2023-04-21 08:22:14 +01:00
appletalk
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atm net: annotate lockless accesses to sk->sk_err_soft 2023-03-17 08:25:05 +00:00
ax25
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batman-adv net: vlan: introduce skb_vlan_eth_hdr() 2023-04-23 14:16:44 +01:00
bluetooth Bluetooth: hci_sync: Only allow hci_cmd_sync_queue if running 2023-04-23 22:07:43 -07:00
bpf bpf: add test_run support for netfilter program type 2023-04-21 11:34:50 -07:00
bpfilter
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bridge bridge: Allow setting per-{Port, VLAN} neighbor suppression state 2023-04-21 08:25:50 +01:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-02 22:22:07 -08:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-06 12:01:20 -07:00
ceph Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
dcb net: dcb: add helper functions to retrieve PCP and DSCP rewrite maps 2023-01-20 09:33:22 +00:00
dccp netfilter: keep conntrack reference until IPsecv6 policy checks are done 2023-03-22 21:50:23 +01:00
devlink devlink: drop leftover duplicate/unused code 2023-02-20 11:38:35 +00:00
dns_resolver
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dsa net: dsa: tag_ocelot: call only the relevant portion of __skb_vlan_pop() on TX 2023-04-23 14:16:45 +01:00
ethernet
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ethtool net: ethtool: coalesce: try to make user settings stick twice 2023-04-24 18:09:49 -07:00
handshake net/handshake: Fix section mismatch in handshake_exit 2023-04-21 20:24:57 -07:00
hsr hsr: ratelimit only when errors are printed 2023-03-16 21:11:03 -07:00
ieee802154 net: ieee802154: remove an unnecessary null pointer check 2023-03-17 09:13:53 +01:00
ife
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ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
ipv6 net: dst: fix missing initialization of rt_uncached 2023-04-21 20:26:56 -07:00
iucv net/iucv: Fix size of interrupt data 2023-03-16 17:34:40 -07:00
kcm net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
key af_key: Fix heap information leak 2023-02-13 09:30:14 +00:00
l2tp l2tp: generate correct module alias strings 2023-03-31 09:25:12 +01:00
l3mdev
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lapb
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llc
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mac80211 wireless-next patches for v6.4 2023-04-21 07:35:51 -07:00
mac802154 Merge tag 'ieee802154-for-net-next-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next 2023-02-20 16:40:52 -08:00
mctp mctp: remove MODULE_LICENSE in non-modules 2023-03-09 23:06:21 -08:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-15 10:26:37 +00:00
mptcp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-20 16:29:51 -07:00
ncsi net: Use of_property_read_bool() for boolean properties 2023-03-16 17:41:28 +00:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
netlabel
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netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
netrom netrom: Fix use-after-free caused by accept on already connected socket 2023-01-30 07:30:47 +00:00
nfc nfc: change order inside nfc_se_io error path 2023-03-07 13:37:05 -08:00
nsh
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openvswitch net: openvswitch: fix race on port output 2023-04-07 19:42:53 -07:00
packet net/packet: support mergeable feature of virtio 2023-04-21 12:01:58 +01:00
phonet net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
psample
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qrtr net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume() 2023-04-13 09:35:30 +02:00
rds rds: rds_rm_zerocopy_callback() correct order for list_add_tail() 2023-02-13 09:33:39 +00:00
rfkill rfkill: Use sysfs_emit() to instead of sprintf() 2023-02-14 12:21:14 +01:00
rose net/rose: Fix to not accept on connected socket 2023-01-28 00:19:57 -08:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-26 10:17:46 +02:00
sctp sctp: delete the nested flexible array hmac 2023-04-21 08:19:30 +01:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-13 16:04:28 -07:00
strparser
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sunrpc SUNRPC: return proper error from get_expiry() 2023-04-26 09:05:00 -04:00
switchdev
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tipc Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
tls net: tls: fix device-offloaded sendpage straddling records 2023-03-06 13:26:16 -08:00
unix af_unix: annotate lockless accesses to sk->sk_err 2023-03-17 08:25:05 +00:00
vmw_vsock vsock/loopback: don't disable irqs for queue access 2023-04-14 11:04:04 +01:00
wireless Merge wireless/main into wireless-next/main 2023-03-31 11:07:40 +02:00
x25 net/x25: Fix to not accept on connected socket 2023-01-25 09:51:04 +00:00
xdp bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
xfrm ipsec-next-2023-04-19 2023-04-19 18:46:17 -07:00
Kconfig net/handshake: Add Kunit tests for the handshake consumer API 2023-04-19 18:48:48 -07:00
Kconfig.debug
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Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c
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socket.c net: skbuff: hide wifi_acked when CONFIG_WIRELESS not set 2023-04-19 13:04:30 +01:00
sysctl_net.c
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