kernel-fxtec-pro1x/net/atm
Gustavo A. R. Silva bcb964012d net: atm: Fix potential Spectre v1 vulnerabilities
[ Upstream commit 899537b73557aafbdd11050b501cf54b4f5c45af ]

arg is controlled by user-space, hence leading to a potential
exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:

net/atm/lec.c:715 lec_mcast_attach() warn: potential spectre issue 'dev_lec' [r] (local cap)

Fix this by sanitizing arg before using it to index dev_lec.

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-27 09:36:30 +02:00
..
addr.c
addr.h
atm_misc.c
atm_sysfs.c
br2684.c
clip.c
common.c
common.h
ioctl.c
Kconfig
lec.c
lec.h
lec_arpc.h
Makefile
mpc.c
mpc.h
mpoa_caches.c
mpoa_caches.h
mpoa_proc.c
pppoatm.c
proc.c
protocols.h
pvc.c
raw.c
resources.c
resources.h
signaling.c
signaling.h
svc.c