David Lebrun dbad5abd2b ipv6: sr: fix scheduling in RCU when creating seg6 lwtunnel state ... [ Upstream commit 191f86ca8e ] The seg6_build_state() function is called with RCU read lock held, so we cannot use GFP_KERNEL. This patch uses GFP_ATOMIC instead. [ 92.770271] ============================= [ 92.770628] WARNING: suspicious RCU usage [ 92.770921] 4.16.0-rc4+ #12 Not tainted [ 92.771277] ----------------------------- [ 92.771585] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 92.772279] [ 92.772279] other info that might help us debug this: [ 92.772279] [ 92.773067] [ 92.773067] rcu_scheduler_active = 2, debug_locks = 1 [ 92.773514] 2 locks held by ip/2413: [ 92.773765] #0: (rtnl_mutex){+.+.}, at: [<00000000e5461720>] rtnetlink_rcv_msg+0x441/0x4d0 [ 92.774377] #1: (rcu_read_lock){....}, at: [<00000000df4f161e>] lwtunnel_build_state+0x59/0x210 [ 92.775065] [ 92.775065] stack backtrace: [ 92.775371] CPU: 0 PID: 2413 Comm: ip Not tainted 4.16.0-rc4+ #12 [ 92.775791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1.fc27 04/01/2014 [ 92.776608] Call Trace: [ 92.776852] dump_stack+0x7d/0xbc [ 92.777130] __schedule+0x133/0xf00 [ 92.777393] ? unwind_get_return_address_ptr+0x50/0x50 [ 92.777783] ? __sched_text_start+0x8/0x8 [ 92.778073] ? rcu_is_watching+0x19/0x30 [ 92.778383] ? kernel_text_address+0x49/0x60 [ 92.778800] ? __kernel_text_address+0x9/0x30 [ 92.779241] ? unwind_get_return_address+0x29/0x40 [ 92.779727] ? pcpu_alloc+0x102/0x8f0 [ 92.780101] _cond_resched+0x23/0x50 [ 92.780459] __mutex_lock+0xbd/0xad0 [ 92.780818] ? pcpu_alloc+0x102/0x8f0 [ 92.781194] ? seg6_build_state+0x11d/0x240 [ 92.781611] ? save_stack+0x9b/0xb0 [ 92.781965] ? __ww_mutex_wakeup_for_backoff+0xf0/0xf0 [ 92.782480] ? seg6_build_state+0x11d/0x240 [ 92.782925] ? lwtunnel_build_state+0x1bd/0x210 [ 92.783393] ? ip6_route_info_create+0x687/0x1640 [ 92.783846] ? ip6_route_add+0x74/0x110 [ 92.784236] ? inet6_rtm_newroute+0x8a/0xd0 Fixes: 6c8702c60b ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Signed-off-by: David Lebrun <dlebrun@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-03-31 18:10:39 +02:00
..
6lowpan
9p	9p/trans_virtio: discard zero-length reply	2018-02-22 15:42:30 +01:00
802
8021q	8021q: fix a memory leak for VLAN 0 device	2018-01-17 09:45:20 +01:00
appletalk
atm
ax25
batman-adv
bluetooth	Bluetooth: Prevent stack info leak from the EFS element.	2018-01-17 09:45:26 +01:00
bpf
bridge	netfilter: bridge: ebt_among: add missing match size checks	2018-03-15 10:54:24 +01:00
caif
can	can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once	2018-01-23 19:58:17 +01:00
ceph
core	devlink: Remove redundant free on error path	2018-03-31 18:10:39 +02:00
dcb
dccp	dccp: CVE-2017-8824: use-after-free in DCCP code	2018-02-16 20:22:45 +01:00
decnet	dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock	2018-02-25 11:07:52 +01:00
dns_resolver
dsa
ethernet
hsr
ieee802154
ife
ipv4	tcp: purge write queue upon aborting the connection	2018-03-31 18:10:38 +02:00
ipv6	ipv6: sr: fix scheduling in RCU when creating seg6 lwtunnel state	2018-03-31 18:10:39 +02:00
ipx
iucv
kcm	kcm: Only allow TCP sockets to be attached to a KCM mux	2018-02-25 11:07:45 +01:00
key	af_key: fix buffer overread in parse_exthdrs()	2018-01-23 19:58:12 +01:00
l2tp
l3mdev
lapb
llc
mac80211	mac80211: remove BUG() when interface type is invalid	2018-03-19 08:42:55 +01:00
mac802154
mpls	mpls, nospec: Sanitize array index in mpls_label_ok()	2018-02-22 15:42:28 +01:00
ncsi
netfilter	netfilter: IDLETIMER: be syzkaller friendly	2018-03-15 10:54:24 +01:00
netlabel
netlink	netlink: put module reference if dump start fails	2018-03-08 22:41:17 -08:00
netrom
nfc
nsh
openvswitch	openvswitch: fix the incorrect flow action alloc size	2018-02-03 17:39:03 +01:00
packet
phonet
psample
qrtr
rds	rds: tcp: atomically purge entries from rds_tcp_conn_list during netns delete	2018-02-25 11:07:51 +01:00
rfkill
rose
rxrpc	rxrpc: Fix send in rxrpc_send_data_packet()	2018-03-08 22:41:12 -08:00
sched	net: sched: drop qdisc_reset from dev_graft_qdisc	2018-03-19 08:42:54 +01:00
sctp	sctp: fix dst refcnt leak in sctp_v6_get_dst()	2018-03-08 22:41:15 -08:00
smc	net/smc: fix NULL pointer dereference on sock_create_kern() error path	2018-03-15 10:54:28 +01:00
strparser
sunrpc	xprtrdma: Fix BUG after a device removal	2018-02-22 15:42:29 +01:00
switchdev
tipc	tipc: fix tipc_mon_delete() oops in tipc_enable_bearer() error path	2018-03-03 10:24:30 +01:00
tls	tls: reset crypto_info when do_tls_setsockopt_tx fails	2018-01-31 14:03:48 +01:00
unix
vmw_vsock	VSOCK: fix outdated sk_state value in hvs_release()	2018-02-25 11:07:59 +01:00
wimax
wireless	nl80211: Check for the required netlink attribute presence	2018-03-03 10:24:34 +01:00
x25
xfrm	xfrm: Fix xfrm_replay_overflow_offload_esn	2018-03-19 08:42:50 +01:00
compat.c
Kconfig
Makefile
socket.c	kmemcheck: remove annotations	2018-02-22 15:42:23 +01:00
sysctl_net.c