Ziyang Xuan 452c3ed7bf net: fix uninit-value in caif_seqpkt_sendmsg ... [ Upstream commit 991e634360 ] 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> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-28 11:13:48 +02:00
..
caif_dev.c	net: caif: fix memory leak in caif_device_notify	2021-06-10 13:24:06 +02:00
caif_socket.c	net: fix uninit-value in caif_seqpkt_sendmsg	2021-07-28 11:13:48 +02:00
caif_usb.c	net: caif: fix memory leak in cfusbl_device_notify	2021-06-10 13:24:06 +02:00
cfcnfg.c	net: caif: add proper error handling	2021-06-10 13:24:06 +02:00
cfctrl.c	caif: reduce stack size with KASAN	2018-01-19 14:02:12 -05:00
cfdbgl.c
cfdgml.c
cffrml.c
cfmuxl.c
cfpkt_skbuff.c	net: caif: remove unused hardirq.h	2018-01-08 20:59:25 -05:00
cfrfml.c
cfserl.c	net: caif: added cfserl_release function	2021-06-10 13:24:06 +02:00
cfsrvl.c
cfutill.c
cfveil.c
cfvidl.c
chnl_net.c	net: caif: fix spelling mistake "UKNOWN" -> "UNKNOWN"	2018-04-19 13:37:10 -04:00
Kconfig
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00