Taehee Yoo 71eb5255f5 bpf: use GFP_ATOMIC instead of GFP_KERNEL in bpf_parse_prog() ... bpf_parse_prog() is protected by rcu_read_lock(). so that GFP_KERNEL is not allowed in the bpf_parse_prog(). [51015.579396] ============================= [51015.579418] WARNING: suspicious RCU usage [51015.579444] 4.18.0-rc6+ #208 Not tainted [51015.579464] ----------------------------- [51015.579488] ./include/linux/rcupdate.h:303 Illegal context switch in RCU read-side critical section! [51015.579510] other info that might help us debug this: [51015.579532] rcu_scheduler_active = 2, debug_locks = 1 [51015.579556] 2 locks held by ip/1861: [51015.579577] #0: 00000000a8c12fd1 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x2e0/0x910 [51015.579711] #1: 00000000bf815f8e (rcu_read_lock){....}, at: lwtunnel_build_state+0x96/0x390 [51015.579842] stack backtrace: [51015.579869] CPU: 0 PID: 1861 Comm: ip Not tainted 4.18.0-rc6+ #208 [51015.579891] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 07/08/2015 [51015.579911] Call Trace: [51015.579950] dump_stack+0x74/0xbb [51015.580000] ___might_sleep+0x16b/0x3a0 [51015.580047] __kmalloc_track_caller+0x220/0x380 [51015.580077] kmemdup+0x1c/0x40 [51015.580077] bpf_parse_prog+0x10e/0x230 [51015.580164] ? kasan_kmalloc+0xa0/0xd0 [51015.580164] ? bpf_destroy_state+0x30/0x30 [51015.580164] ? bpf_build_state+0xe2/0x3e0 [51015.580164] bpf_build_state+0x1bb/0x3e0 [51015.580164] ? bpf_parse_prog+0x230/0x230 [51015.580164] ? lock_is_held_type+0x123/0x1a0 [51015.580164] lwtunnel_build_state+0x1aa/0x390 [51015.580164] fib_create_info+0x1579/0x33d0 [51015.580164] ? sched_clock_local+0xe2/0x150 [51015.580164] ? fib_info_update_nh_saddr+0x1f0/0x1f0 [51015.580164] ? sched_clock_local+0xe2/0x150 [51015.580164] fib_table_insert+0x201/0x1990 [51015.580164] ? lock_downgrade+0x610/0x610 [51015.580164] ? fib_table_lookup+0x1920/0x1920 [51015.580164] ? lwtunnel_valid_encap_type.part.6+0xcb/0x3a0 [51015.580164] ? rtm_to_fib_config+0x637/0xbd0 [51015.580164] inet_rtm_newroute+0xed/0x1b0 [51015.580164] ? rtm_to_fib_config+0xbd0/0xbd0 [51015.580164] rtnetlink_rcv_msg+0x331/0x910 [ ... ] Fixes: 3a0af8fd61 ("bpf: BPF for lightweight tunnel infrastructure") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-07-28 21:23:24 +02:00
..
6lowpan
9p	net/9p/client.c: put refcount of trans_mod in error case in parse_opts()	2018-07-14 11:11:09 -07:00
802
8021q	net: fix use-after-free in GRO with ESP	2018-07-02 20:34:04 +09:00
appletalk	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
atm	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
ax25	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
batman-adv	batman-adv: Fix multicast TT issues with bogus ROAM flags	2018-06-23 10:29:33 +02:00
bluetooth	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
bpf	bpf: fix panic due to oob in bpf_prog_test_run_skb	2018-07-11 16:10:57 -07:00
bpfilter	bpfilter: include bpfilter_umh in assembly instead of using objcopy	2018-06-28 21:39:16 +09:00
bridge	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-06-16 07:39:34 +09:00
caif	net: caif: Add a missing rcu_read_unlock() in caif_flow_cb	2018-07-21 16:14:39 -07:00
can	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
ceph	The main piece is a set of libceph changes that revamps how OSD	2018-06-15 07:24:58 +09:00
core	bpf: use GFP_ATOMIC instead of GFP_KERNEL in bpf_parse_prog()	2018-07-28 21:23:24 +02:00
dcb	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
dccp	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
decnet	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
dns_resolver	KEYS: DNS: fix parsing multiple options	2018-07-16 11:22:14 -07:00
dsa	net: dsa: add error handling for pskb_trim_rcsum	2018-06-11 14:19:38 -07:00
ethernet	net: core: rework basic flow dissection helper	2018-05-08 00:02:36 -04:00
hsr
ieee802154	ieee802154: 6lowpan: set IFLA_LINK	2018-07-05 11:13:17 +02:00
ife	net: sched: ife: check on metadata length	2018-04-22 21:12:00 -04:00
ipv4	tcp: add tcp_ooo_try_coalesce() helper	2018-07-23 12:01:36 -07:00
ipv6	ip: hash fragments consistently	2018-07-23 11:39:30 -07:00
iucv	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
kcm	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
key	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
l2tp	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
l3mdev
lapb
llc	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
mac80211	mac80211: disable BHs/preemption in ieee80211_tx_control_port()	2018-06-29 09:39:08 +02:00
mac802154	net/mac802154: disambiguate mac80215 vs mac802154 trace events	2018-03-28 22:55:18 +02:00
mpls	net: Drop pernet_operations::async	2018-03-27 13:18:09 -04:00
ncsi	net/ncsi: Use netdev_dbg for debug messages	2018-06-20 07:26:58 +09:00
netfilter	netfilter: nf_conntrack: Fix possible possible crash on module loading.	2018-07-09 18:04:11 +02:00
netlabel	audit: use inline function to get audit context	2018-05-14 17:24:18 -04:00
netlink	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
netrom	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
nfc	net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL.	2018-07-18 10:51:45 -07:00
nsh	nsh: set mac len based on inner packet	2018-07-12 16:55:29 -07:00
openvswitch	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
packet	packet: reset network header if packet shorter than ll reserved space	2018-07-12 16:55:59 -07:00
phonet	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
psample
qrtr	net: qrtr: Reset the node and port ID of broadcast messages	2018-07-05 20:20:03 +09:00
rds	rds: clean up loopback rds_connections on netns deletion	2018-06-27 10:11:03 +09:00
rfkill	rfkill: Create rfkill-none LED trigger	2018-05-23 11:26:45 +02:00
rose	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
rxrpc	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
sched	net: sched: Using NULL instead of plain integer	2018-07-18 13:44:07 -07:00
sctp	sctp: fix the issue that pathmtu may be set lower than MINSEGMENT	2018-07-04 21:36:34 +09:00
smc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-07-18 19:32:54 -07:00
strparser	strparser: Remove early eaten to fix full tcp receive buffer stall	2018-06-28 21:37:26 +09:00
sunrpc	NFS client bugfixes for Linux 4.18	2018-06-22 06:21:34 +09:00
switchdev
tipc	tipc: make function tipc_net_finalize() thread safe	2018-07-07 19:49:02 +09:00
tls	tls: check RCV_SHUTDOWN in tls_wait_data	2018-07-20 14:38:14 -07:00
unix	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
vmw_vsock	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
wimax
wireless	nl80211: check nla_parse_nested() return values	2018-06-29 09:44:51 +02:00
x25	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
xdp	xsk: fix poll/POLLIN premature returns	2018-07-26 02:53:10 +02:00
xfrm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-06-06 18:39:49 -07:00
compat.c	net: support compat 64-bit time in {s,g}etsockopt	2018-04-27 19:46:06 -04:00
Kconfig	net: Introduce generic failover module	2018-05-28 22:59:54 -04:00
Makefile	bpfilter: check compiler capability in Kconfig	2018-06-28 13:36:39 +09:00
socket.c	net: handle NULL ->poll gracefully	2018-06-29 06:51:51 -07:00
sysctl_net.c	net: Drop pernet_operations::async	2018-03-27 13:18:09 -04:00