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747b67088f
linux/net
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Sabrina Dubroca 747b67088f xfrm: ipcomp: remove unnecessary get_cpu() 
While testing ipcomp on a realtime kernel, Xiumei reported a "sleeping
in atomic" bug, caused by a memory allocation while preemption is
disabled (ipcomp_decompress -> alloc_page -> ... get_page_from_freelist).

As Sebastian noted [1], this get_cpu() isn't actually needed, since
ipcomp_decompress() is called in napi context anyway, so BH is already
disabled.

This patch replaces get_cpu + per_cpu_ptr with this_cpu_ptr, then
simplifies the error returns, since there isn't any common operation
left.

[1] https://lore.kernel.org/lkml/20190820082810.ixkmi56fp7u7eyn2@linutronix.de/

Cc: Juri Lelli <jlelli@redhat.com>
Reported-by: Xiumei Mu <xmu@redhat.com>
Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-04-19 12:49:29 +02:00
..
6lowpan 6lowpan: Fix some typos in nhc_udp.c 2021-03-24 17:52:11 -07:00
9p net: 9p: Correct function names in the kerneldoc comments 2021-03-28 17:56:56 -07:00
802
8021q net: bridge: resolve forwarding path for VLAN tag actions in bridge devices 2021-03-24 12:48:38 -07:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-02-12 16:40:28 -08:00
atm net: atm: pppoatm: use new API for wakeup tasklet 2021-01-29 18:24:05 -08:00
ax25 net/ax25: Delete obsolete TODO file 2021-03-30 16:54:50 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
bluetooth Bluetooth: Allow Microsoft extension to indicate curve validation 2021-04-08 12:26:34 +02:00
bpf bpf: selftests: Add kfunc_call test 2021-03-26 20:41:52 -07:00
bpfilter net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
bridge net: bridge: propagate error code and extack from br_mc_disabled_update 2021-04-14 14:32:05 -07:00
caif net: caif: Use netif_rx_any_context(). 2021-02-15 13:21:48 -08:00
can can: isotp: fix msg_namelen values depending on CAN_REQUIRED_SIZE 2021-03-29 09:51:43 +02:00
ceph net: ceph: Fix a typo in osdmap.c 2021-03-25 17:05:07 -07:00
core scm: optimize put_cmsg() 2021-04-15 17:03:33 -07:00
dcb net: dcb: use obj-$(CONFIG_DCB) form in net/Makefile 2021-01-27 17:03:52 -08:00
dccp net: dccp: use net_generic storage 2021-04-09 16:34:56 -07:00
decnet net/decnet: Delete obsolete TODO file 2021-03-30 16:54:50 -07:00
dns_resolver net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
dsa of: net: pass the dst buffer to of_get_mac_address() 2021-04-13 14:35:02 -07:00
ethernet of: net: pass the dst buffer to of_get_mac_address() 2021-04-13 14:35:02 -07:00
ethtool ethtool: add FEC statistics 2021-04-15 17:08:29 -07:00
hsr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
ieee802154 net: remove the new_ifindex argument from dev_change_net_namespace 2021-04-07 14:43:28 -07:00
ife net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
ipv4 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2021-04-14 13:15:12 -07:00
ipv6 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2021-04-14 13:15:12 -07:00
iucv iucv: af_iucv.c: Couple of typo fixes 2021-03-28 17:31:13 -07:00
kcm kcm: kcmsock.c: Couple of typo fixes 2021-03-28 17:31:13 -07:00
key af_key: relax availability checks for skb size calculation 2021-01-04 10:05:50 +01:00
l2tp net: l2tp: Fix a typo 2021-03-22 13:17:49 -07:00
l3mdev l3mdev: Correct function names in the kerneldoc comments 2021-03-28 17:56:55 -07:00
lapb net: lapb: Make "lapb_t1timer_running" able to detect an already running timer 2021-03-23 14:14:50 -07:00
llc llc: llc_core.c: COuple of typo fixes 2021-03-28 17:31:13 -07:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
mac802154 net: mac802154: Fix general protection fault 2021-04-06 22:42:16 +02:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-03-09 16:12:20 -08:00
mptcp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
ncsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
netfilter netfilter: conntrack: Make global sysctls readonly in non-init netns 2021-04-12 13:27:11 -07:00
netlabel netlabel: Correct function name netlbl_mgmt_add() in the kerneldoc comments 2021-03-28 17:56:55 -07:00
netlink mptcp: avoid lock_fast usage in accept path 2021-02-12 16:31:46 -08:00
netrom
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
nsh
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
packet net/packet: remove data races in fanout operations 2021-04-14 14:34:38 -07:00
phonet
psample psample: Add additional metadata attributes 2021-03-14 15:00:43 -07:00
qrtr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
rfkill rfkill: revert back to old userspace API by default 2021-04-08 10:14:45 +02:00
rose net: rose: Fix fall-through warnings for Clang 2021-03-10 12:45:15 -08:00
rxrpc rxrpc: Fix dependency on IPv6 in udp tunnel config 2021-02-12 16:42:05 -08:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
smc net: smc: Remove repeated struct declaration 2021-04-01 15:52:38 -07:00
strparser
sunrpc Miscellaneous NFSD fixes for v5.12-rc. 2021-03-16 10:22:50 -07:00
switchdev net: bridge: propagate extack through switchdev_port_attr_set 2021-02-14 17:38:11 -08:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
tls skmsg: Extract __tcp_bpf_recvmsg() and tcp_bpf_wait_data() 2021-04-01 10:56:14 -07:00
unix af_unix: handle idmapped mounts 2021-01-24 14:27:18 +01:00
vmw_vsock net: vsock: Fix a typo 2021-03-28 17:52:51 -07:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
x25 af_x25.c: Fix a spello 2021-03-28 17:31:13 -07:00
xdp bpf, xdp: Restructure redirect actions 2021-03-10 01:06:34 +01:00
xfrm xfrm: ipcomp: remove unnecessary get_cpu() 2021-04-19 12:49:29 +02:00
compat.c
devres.c
Kconfig net: add CONFIG_PCPU_DEV_REFCNT 2021-03-19 13:38:46 -07:00
Makefile net: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile 2021-01-27 17:03:52 -08:00
socket.c net: Fix a misspell in socket.c 2021-03-25 16:56:27 -07:00
sysctl_net.c net: Ensure net namespace isolation of sysctls 2021-04-12 13:27:11 -07:00