Ziyang Xuan 991e634360 net: fix uninit-value in caif_seqpkt_sendmsg ... When nr_segs equal to zero in iovec_from_user, the object msg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg which is defined in ___sys_sendmsg. So we cann't just judge msg->msg_iter.iov->base directlly. We can use nr_segs to judge msg in caif_seqpkt_sendmsg whether has data buffers. ===================================================== BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmmsg+0x808/0xc90 net/socket.c:2480 __compat_sys_sendmmsg net/compat.c:656 [inline] Reported-by: syzbot+09a5d591c1f98cf5efcb@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?id=1ace85e8fc9b0d5a45c08c2656c3e91762daa9b8 Fixes: bece7b2398 ("caif: Rewritten socket implementation") Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-07-15 11:08:33 -07:00
..
6lowpan	6lowpan: Fix some typos in nhc_udp.c	2021-03-24 17:52:11 -07:00
9p	9p/trans_virtio: Fix spelling mistakes	2021-06-02 14:01:55 -07:00
802	net/802/garp: fix memleak in garp_request_join()	2021-07-01 11:21:57 -07:00
8021q	net: vlan: pass thru all GSO_SOFTWARE in hw_enc_features	2021-06-18 11:58:03 -07:00
appletalk	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-06-18 19:47:02 -07:00
atm	atm: Use list_for_each_entry() to simplify code in resources.c	2021-06-10 14:08:09 -07:00
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	2021-06-18 19:47:02 -07:00
bluetooth	TTY / Serial patches for 5.14-rc1	2021-07-05 14:08:24 -07:00
bpf	bpf: Prepare bpf syscall to be used from kernel and user space.	2021-05-19 00:33:40 +02:00
bpfilter	bpfilter: Specify the log level for the kmsg message	2021-06-25 13:13:50 +02:00
bridge	net: bridge: multicast: fix MRD advertisement router port marking race	2021-07-11 12:11:06 -07:00
caif	net: fix uninit-value in caif_seqpkt_sendmsg	2021-07-15 11:08:33 -07:00
can	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-06-29 15:45:27 -07:00
ceph	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
core	net_sched: introduce tracepoint trace_qdisc_enqueue()	2021-07-15 10:32:38 -07:00
dcb	net: dcb: Return the correct errno code	2021-06-01 17:01:33 -07:00
dccp	net: sock: introduce sk_error_report	2021-06-29 11:28:21 -07:00
decnet	decnet: Fix spelling mistakes	2021-06-02 14:01:55 -07:00
dns_resolver
dsa	net: dsa: properly check for the bridge_leave methods in dsa_switch_bridge_leave()	2021-07-13 14:47:10 -07:00
ethernet	of: net: pass the dst buffer to of_get_mac_address()	2021-04-13 14:35:02 -07:00
ethtool	net: sock: extend SO_TIMESTAMPING for PHC binding	2021-07-01 13:08:18 -07:00
hsr	net: hsr: don't check sequence number if tag removal is offloaded	2021-06-16 12:13:01 -07:00
ieee802154	ieee802154: fix error return code in ieee802154_llsec_getparams()	2021-06-03 10:59:49 +02:00
ife
ipv4	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
ipv6	ipv6: allocate enough headroom in ip6_finish_output2()	2021-07-12 11:25:12 -07:00
iucv	s390: iucv: Avoid field over-reading memcpy()	2021-07-01 15:54:01 -07:00
kcm	net: sock: introduce sk_error_report	2021-06-29 11:28:21 -07:00
key	net: Remove unnecessary variables	2021-05-26 07:03:39 +02:00
l2tp	l2tp: Fix spelling mistakes	2021-06-07 14:08:30 -07:00
l3mdev	l3mdev: Correct function names in the kerneldoc comments	2021-03-28 17:56:55 -07:00
lapb	net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c	2021-06-08 16:31:25 -07:00
llc	llc2: Remove redundant assignment to rc	2021-04-27 14:16:14 -07:00
mac80211	mac80211: Switch to a virtual time-based airtime scheduler	2021-06-23 18:12:00 +02:00
mac802154	net: mac802154: Fix general protection fault	2021-04-06 22:42:16 +02:00
mpls	mpls: Remove redundant assignment to err	2021-04-27 14:17:00 -07:00
mptcp	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
ncsi	net/ncsi: add dummy response handler for Intel boards	2021-07-08 14:16:39 -07:00
netfilter	netfilter: nft_last: incorrect arithmetics when restoring last used	2021-07-06 14:15:13 +02:00
netlabel	netlabel: Fix memory leak in netlbl_mgmt_add_common	2021-06-15 11:19:04 -07:00
netlink	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
netrom	net: netrom: Fix fall-through warnings for Clang	2021-05-17 19:57:08 -05:00
nfc	TTY / Serial patches for 5.14-rc1	2021-07-05 14:08:24 -07:00
nsh
openvswitch	openvswitch: Optimize operation for key comparison	2021-07-01 11:13:10 -07:00
packet	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
phonet
psample
qrtr	net: sock: introduce sk_error_report	2021-06-29 11:28:21 -07:00
rds	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
rfkill	Another set of updates, all over the map:	2021-04-20 16:44:04 -07:00
rose
rxrpc	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
sched	net/sched: act_ct: remove and free nf_table callbacks	2021-07-02 13:36:35 -07:00
sctp	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
smc	net: sock: introduce sk_error_report	2021-06-29 11:28:21 -07:00
strparser	net: sock: introduce sk_error_report	2021-06-29 11:28:21 -07:00
sunrpc	NFS client updates for Linux 5.14	2021-07-09 09:43:57 -07:00
switchdev	net: switchdev: add a context void pointer to struct switchdev_notifier_info	2021-06-28 14:09:03 -07:00
tipc	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
tls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-06-29 15:45:27 -07:00
unix	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
vmw_vsock	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
wireless	cfg80211: Support hidden AP discovery over 6GHz band	2021-06-23 13:05:09 +02:00
x25	net: x25: Use list_for_each_entry() to simplify code in x25_route.c	2021-06-10 14:08:09 -07:00
xdp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-06-29 15:45:27 -07:00
xfrm	Networking changes for 5.14.	2021-06-30 15:51:09 -07:00
compat.c	net: Return the correct errno code	2021-06-03 15:13:56 -07:00
devres.c	net: devres: Correct a grammatical error	2021-06-11 12:55:28 -07:00
Kconfig	bpf, kconfig: Add consolidated menu entry for bpf with core options	2021-05-11 13:56:16 -07:00
Makefile
socket.c	net: socket: support hardware timestamp conversion to PHC bound	2021-07-01 13:08:18 -07:00
sysctl_net.c	net: Ensure net namespace isolation of sysctls	2021-04-12 13:27:11 -07:00