linux-stable/net/9p
Anant Thazhemadam 9d5fa0ad46 net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid
[ Upstream commit 7ca1db21ef ]

In p9_fd_create_unix, checking is performed to see if the addr (passed
as an argument) is NULL or not.
However, no check is performed to see if addr is a valid address, i.e.,
it doesn't entirely consist of only 0's.
The initialization of sun_server.sun_path to be equal to this faulty
addr value leads to an uninitialized variable, as detected by KMSAN.
Checking for this (faulty addr) and returning a negative error number
appropriately, resolves this issue.

Link: http://lkml.kernel.org/r/20201012042404.2508-1-anant.thazhemadam@gmail.com
Reported-by: syzbot+75d51fe5bf4ebe988518@syzkaller.appspotmail.com
Tested-by: syzbot+75d51fe5bf4ebe988518@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-05 11:08:44 +01:00
..
client.c 9p: Transport error uninitialized 2019-10-11 18:21:12 +02:00
error.c
Kconfig IB: Revert "remove redundant INFINIBAND kconfig dependencies" 2018-05-28 10:40:16 -06:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mod.c 9p: Use a slab for allocating requests 2019-07-03 13:14:41 +02:00
protocol.c 9p: p9dirent_read: check network-provided name length 2019-07-03 13:14:42 +02:00
protocol.h
trans_common.c net/9p: include trans_common.h to fix missing prototype warning. 2019-07-03 13:14:43 +02:00
trans_common.h net/9p: remove (now-)unused helpers 2015-04-11 22:28:29 -04:00
trans_fd.c net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid 2020-11-05 11:08:44 +01:00
trans_rdma.c 9p/rdma: remove useless check in cm_event_handler 2019-07-03 13:14:42 +02:00
trans_virtio.c 9p/virtio: Add cleanup path in p9_virtio_init 2019-07-26 09:14:25 +02:00
trans_xen.c 9p/xen: Add cleanup path in p9_trans_xen_init 2019-07-26 09:14:25 +02:00
util.c 9p: fix whitespace issues 2018-08-13 09:34:58 +09:00